1790-1810, most nails were made entirely by hand at the forge. Square nuts are used along with flat washers to avoid damage from its sharp edges and increase the strength of the fastener. Wood Screws. Multiple Options Available. Although the idea appeared in the mid-16th century, application of the principle was limited until the advent of screw-making machinery in the mid-19th century. Robertson (1879–1951), 28 years before Henry Phillips patented his Phillips head screws,. 6. When were phillips head screw drivers invented? The phillips head screw was invented in the 1930's and received its patent in 1936. The simple screwdriver was preceded by a flat-bladed bit for the carpenter’s brace (1744). Spring-opposed screws were invented in the year 1871 by Heller & Brightly and were incorporated by most manufacturers after 1885. An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle from the vertical direction, with one end higher than the other, used as an aid for raising or lowering a load. 169. When was the screwdriver invented? The earliest documented screwdrivers were used in the late Middle Ages. Initially, Torx screws were used to lock emissions units in automobiles. It is considered by some that the screw thread was invented in about 400BC by Archytas of Tarentum (428 BC - 350 BC). A set of lug nuts is typically used to secure a wheel to threaded wheel studs and thereby to a vehicle's axles . When were flat head screws invented? Whether you work in construction or you’re simply a fan of trivia, we’re here to sate your curiosity with some facts about screws. They needed screws that could take greater torque and could provide tighter fastenings. This Klein Tools #2 Phillips Screwdriver features an easy-grip rubber handle and a precision-ground head that resists slippage. Choose from our selection of flush head screws, including hex drive flat head screws, Phillips flat head screws, and more. Here are some of the newer thread designs and their intended advantages: QuickCutter thread (Quickscrews production screws): Deep threads and an extra-long flute above the point. Handheld screwdrivers first appeared after 1800. The reason the phillips screw was invented was to allow the screwdriver to "torque-out" of the screw rather than break the screw head off if you over-tighten it. Around 4000 BC, Egyptians assembled a simple rigging system and suspended a piece of cloth in the air to pull basic log boats along rivers. Flat irons were also called sad irons or smoothing irons. In the 1500s, screws appeared in German watches, and were used to fasten suits of armor. Pozidriv Screwdriver. 688 BC) is made with stone arches and lined with waterproof concrete. jack, as it currently stands, is the musical equivalent of a Phillips screwdriver, better than what we originally had (flathead screws) but also greatly. A jack is a mechanical lifting device used to apply great forces or lift heavy loads. Some designs (Audi, BMW, Mercedes-Benz, Saab, Volkswagen) use lug bolts or wheel bolts instead of nuts, which screw into a. C. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation, with all other translations or rotations prevented; thus a hinge has one degree of freedom. A mechanical jack employs a screw thread for lifting heavy equipment. When was the flat head screwdriver invented? As mentioned, it’s difficult to pinpoint the exact date of invention for the flat head screwdriver, as it has been in use for centuries. This screw is commonly used for woodwork and decorative accessories. Robertson. The Origins: Ancient Greece, 400 BC It all started many centuries ago, and it was Archytas that invented the very first screws back in 400 BC. The speed opener is a flat blade of steel approximately 4 cm wide and 16 cm long with a thumb hole at one end and a. for pricing and availability. This was improved upon until the process for the cold rolling thread that was until the engineering, materials, and machines of the industrial revolution were made screws useful in building projects. In 1908, square-drive screws were invented by Canadian P. The late 1800s finally made screws a usable option on a large scale due to better machining techniques being made available. 1830 Modern screw pump is invented by Revillion. History of the Screwdriver . It is used to allow a screw or bolt to be inserted into it. Becoming more common with Torx / Six-lobe drives as well. Some historians suggest that they may have been used in ancient Egypt, while others believe that they were first used in Europe during the 16th century. The Gauge is 8. S. It appears that the Phillips head screw and driver were invented in the. 287 BC – c. When were phillips head screw drivers invented? Wiki User. The growing uses of paper in the 19th century created a demand for an efficient paper fastener. These scooter-boxes were seen as far back as the late 1800s, but it wasn’t until the 1950s when wooden pallets with clay wheels were popularized on the downhill slopes of Southern California. The evolution of Edison's incandescent electric light bulb and socket - 1880-1881. #3, torx, and squares are where it's at. Metric Stainless Steel Tamper-ResistantButton Head Hex Drive Screws. It normally consists of two threaded eye bolts, one screwed into each end of a small metal frame, one with a left-hand thread and the other with a. Use 1-5/8-in. Basically, the monkey wrench has a fixed upper jaw with a lower jaw that can move up and down the wrench through a screw. Flush riveting was invented in. The Phillips head screw. Ubaid Boats, the Mesopotamian Ships . Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. 3. You must countersink the hole before driving the screws (Illus. In 1858, a Vineland, New Jersey, tinsmith named John Landis Mason (1832–1902) invented and patented a screw threaded glass jar or bottle that became known as the Mason jar (U. Technology. The external threads on the screw can either mate with an internally threaded nut or hole, or cut its way into a soft material. Phillips, who developed and patented his Phillips-head screwdriver in 1933. 31 mm. We would like to show you a description here but the site won’t allow us. These earliest screwdrivers had pear-shaped handles and were made for slotted screws (diversification of the many types of screwdrivers did not emerge until the Gilded Age). These screw lengths ensure the screw drives completely through the drywall and into at least half the thickness of a standard stud to provide a secure hold. The screws will not be uniform with heads off center and slots off center on the heads. A Robertson screw, also known as a square screw or Scrulox, is a type of screw with a square-shaped socket in the screw head and a corresponding square protrusion on the tool. Yellow drivers (#0) work with screw types 3 and 4 and feature a recess size range of 2. Flathead screws are meant to be countersunk flush or below the wood surface. In manufacturing, a countersink (symbol: ⌵) is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. Use a slotted screwdriver (flat blade) for slotted, combination and one way. They were. A potentiometer knob with a set screw for locking it in place. What is the meaning of Phillips head screwdriver? A Phillips screwdriver has a head with pointed edges in the shape of a cross , which fit neatly into the cross slots of a Phillips screw. Invented in the early 19th century, screw tops weren’t produced with any uniform standards. Binding Head Screw: ( Types of Screw Heads ) They are a unique screw which are used for various of projects. A McGill stapler. The Assyrian King Sennacherib (704–681 BC) claims to have invented automatic sluices and to have been the first to use water screw pumps, of up to 30 tons weight, which were cast using two-part clay molds rather than by the 'lost wax' process. When the U. The modern-style twist drill bit was invented by Sir Joseph Whitworth in 1860. 105" thick. Yes, screws have been a long time in the making, and in this guide, we’ll talk about the history of the screw in great detail. Compare $ 45. the filister screw was actually invented in 1897 by Sir George Filister who was knighted for his valuable contribution to the already overcrowded alternative fastener department at the Whitworth company. 316 Stainless Steel Flanged Button Head Screws. FastenMaster. Movable type and paper were invented in China, and printing with movable type was undertaken. They are stronger than Grade 8 steel screws and are nearly two and a half times stronger than stainless steel thread-locking screws. A hydraulic jack uses hydraulic power. The modern screwdriver, as we now know it, was invented by Industrialist Henry F. Hand tool - Drilling, Boring, Chiseling: A varied terminology is related to making holes with revolving tools. ”. Drive screws, possibly another name for drive rivets, are commonly used to hold nameplates into blind holes. The flange distributes pressure over the surface, eliminating the need for a washer. Green Robertson screwdriver (#1) operates with screw types 5, 6, and 7, with a recess size range of 2. Most issues with flat head screws arise from. At the time of this advertisement, the fittings were of the flat-top type, but Zerk fittings would soon appear. 6 kg), and hard to move. When the patents were granted in 1933, the rights were assigned "By Direct and Mesne Assignments" to Henry F. It was invented in the 15th century in Europe and one of the most common types of screwdrivers. Robertson’s screws were superior to slot head screws since the square recess automatically centered the screwdriver, provided more surface area for the driver to press. Choose from our selection of 10-24 screws, including over 2,600 products in a wide range of styles and sizes. 1740-1765 . Robertson's came along when labor costs were increasing and when the length of time a product was on the line was a big cost factor. Automobile manufacturers now used car assembly lines. Torx. Henry Phillips of the Phillips Screw Company in Portland, Ore. Star Flat-Head Wood Deck Screw 10 lbs. Robertson. One such patent of 1902-03 was the Giles jar and cap. A chair screw (also known as coach screw) is a large (~6 in or 152 mm length, slightly under 1 in or 25 mm diameter) metal screw used to fix a chair (for bullhead rail), baseplate (for flat bottom rail) or to directly. Around 1740, the English began mass-producing cast steel. Eventually, the concepts specific to screw manufacturing were also applied to the manufacture of other items. All the shortlisted online casinos here offer a great variety of slot machines for players to enjoy, including classic and video variations with plenty of different themes to choose from. Abrading & Polishing;. Automobile manufacturers now used car assembly lines. Set a marking gauge to the pencil line and gauge a line at each location you need a screw. These are often used for general-purpose fastening and have countersunk heads that fit flush with the surface when installed. These screws were invented in the 1930s by Henry F. 1800 B. Wall plugs. When did flat head screws come out? In 1744, the flat-bladed bit for the carpenter’s brace was invented, the precursor to the first simple screwdriver. "Flathead, North American Indian tribe of what is now western Montana, U. His Sackett Board would become “drywall. Flat screw heads sit completely flush with a surface, leaving no head exposed. For screws measured in inches, diameters of 1/4 inch and smaller (for machine and sheet metal screws) or 5/16 inch and smaller (for wood screws) are expressed with a # and a whole number (ex. Threading (manufacturing) In manufacturing, threading is the process of creating a screw thread. The threads are designed so that a screw can be fastened into a groove. They are called “countersunk screws” because they “sink”. They were mostly used for general work like felling trees but were sometimes used as a weapon. Robertson!. ”The general principle of the. The “History of the Nut and Bolt Industry in America” by W. Hex Head Screws. ∙ 2017-10-31 01:28:43. In the early 1900s, different types of screw heads came about. You can use a drill bit the same diameter as the head of. In 1770, English instrument maker, Jesse Ramsden (1735-1800) invented the first. patent titled “Inside-Wall Covering” on May 23, 1890. Without removing the screwdriver, press down and slowly unscrew the screw. Of the many that exist, the most common are: slotted, Phillips, combination (both slotted and Phillips), hex, hex socket, square, Torx® and spanner. Even torx aren't immune against this, but then again if a torx is stuck you're more likely to round the head entirely. It's also easier to hold the screwdriver in. These 20th-century screw-topped bottles have. The device consisted of three upright metal bars, between which the thumbs were placed. A nut is a type of fastener with a threaded hole. He showed his. 1. Purchase 1-1/4-in. Use the formula below to estimate the screw head and gauge. See moreScrews (and they were very often slotted screws) date back much earlier. Padlocks that offered more key variance were the demise of the screw lock. Thompson who, in 1932, patented (#1,908,080) a recessed cruciform screw and in 1933, a screwdriver for it. The idea of a hex socket screw drive was probably conceived as early as the 1860s to the 1890s, but such screws were probably not manufactured until around 1910. Slotted screws, along with Philips are among the most commonly used screws. British Standard Whitworth (BSW) is an imperial-unit-based screw thread standard, devised and specified by Joseph Whitworth in 1841 and later adopted as a British Standard. A nylon patch bonded to the threads of these metric screws adds friction to prevent loosening from vibration. By the 1st century BC, the Greeks and Romans were using screw presses to press clothes, olives and wine. 86 mm. Flat head refers to the screw head profile, not the type of slot. Flathead drivers were invented as a handy general purpose scraping/prying tool that can also be used to fasten Philips head screws if you can't find the correct driver. American engineer William Sellers did the same for his. Domed: The flat inner part helps this dome-shaped head sit flush on the surface. Zinc-plated steel screw nails resist rust. When. Screws: A screw is a metal fastener with a helical thread that winds around the screw. In 1933 he also patent-protected a matching screwdriver. In these times. Yes, in some parts of the world, people don't have phillips or. More screw threads are produced each year than any other machine element. The screws tend to be lightweight and relatively small. Ancient screws were generally made by hand with. To. More narrowly, self-tapping is used only to describe a specific type of thread-cutting screw intended to produce a thread in relatively soft material or sheet. The ball screw is invented by Rudolph G. A Sunday Oregonian article from 1939 stated that Thompson, who died in Portland on September 4, 1940, had been an auto mechanic when he invented the screw. It's also the oldest design used since the 1400's. If the screw is stuck it doesn't matter how well it fits, it'll still slip. You can get round head or pan head or bugle head with either drive as well. A nylon patch bonded to the threads of these metric screws adds friction to prevent loosening from vibration. We were on a job recently, installing. 16. When the screw’s thread engages with the wood, move your fingers that were holding the screw in place to the screwdriver shank. Shawn Lifer. Phillips in the 1930s. 5/16 head times two equals 10, minus two equals 8. Robert Fulton(1765-1815) built his first boat after Fitch's death and would become known as the "father of steam navigation. That's why #2 screws need to die as well. Thompson thought that a crosshair-style engagement would be a better idea. The flanks of the Phillips cross-head screws taper off towards the tip. Screw Length: 1-1/2 in. Allows for slightly longer thread grip. In the 1st century ad , wooden screws were used in wine and olive-oil presses, and cutters (taps) for cutting internal threads were in use. The advantage of flat screws is that you don’t have to worry about the screw sticking out of the surface and other things snagging on it. This type of bolt was named after the shape of a cane, similar to the shape of a candy cane or walking cane. This technology was applied to axe making by 1765 to make the cutting edge section of the head. Secondly, it's often used in low tech maintenance applications, because anyone has a flat screwdriver somewhere, or can make one himself. These continuous screw-thread jars were designed with a bead between the screw threads and the shoulder as a sealing surface. Information on Screw Threads. The #0 Phillips head screwdriver fits screw sizes 0 and 1. A wall plug (UK English), also known as an anchor (US) or "Rawlplug" (UK), is a fibre or plastic (originally wood) insert used to enable the attachment of a screw in material that is porous or brittle or that would otherwise not support the weight of the object attached with the screw. Some were made of stone, like these soapstone irons from Italy. Flathead drivers were invented as a handy general purpose scraping/prying tool that can also be used to fasten Philips head screws if you can't find the correct driver. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. They were invented by Canadian traveling salesman Peter Robertson around 1906. Screws were described as "2BA", "4BA" etc. Socket set with ratchet (above), four hex sockets and a universal joint. Pivoted scissors were not manufactured in large numbers until 1761, when Robert Hinchliffe of Sheffield produced the first pair of modern-day scissors made of hardened and polished cast steel. One Ada Harris was. Turning the screw was accomplished with a drive rod handle positioned through the perpendicular hole. It first. Wire-clamped jars such as Lightning and Atlas jars were in use from the late 19th century until 1964, and still, turn up in yard sales and thrift shops. Who invented Phillips head screws? John P. Around the time of the Industrial Revolution, about 1860, the methods of making nails, screws, hinges and latches, and of milling lumber, changed often. Devices functionally equivalent to dice, in the form of flat two-sided throwsticks, are seen in the Egyptian game of. Screws with pointy ends are meant to be driven into materials that. Also known as transfer screws, these punches have a uniform shoulder height so you can quickly transfer multiple hole locations at once. Sit just above the surface for a low-profile finish and hold tighter than flat head screws. . Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. Wood screws strengthen a joint with great clamping force. 4 wood screws, including over 70 products in a wide range of styles and sizes. The company began with an automatic screw machine invented by Frank Sr. Screw eyes Screw eyes. Roman fresco of a woman fixing her hair using a mirror, from Stabiae, Italy, 1st century AD Detail of the convex mirror from the Arnolfini portrait, Bruges, 1434 AD 'Adorning Oneself', detail from 'Admonitions of the Instructress to the Palace Ladies', Tang dynasty copy of an original by Chinese painter Gu Kaizhi, c. They allow for more clamping load or force to be applied. When was the slot screw invented? The first documentation of the tool is in the medieval Housebook of Wolfegg Castle, a manuscript written sometime between 1475 and 1490. But what is a Phillips head screwdriver? These tools are designed to fit screws with Phillips heads, which have a cross-shaped recess - hence the alternative name of cross screwdriver. The screw was also apparently. While many metal hinges remain from periods dating back 5500 years, there is also evidence from later cultures that wood and stone were used to produce them, it follows that some of these ancient Mesopotamian cultures may. Improved manufacturing methods allowed the manufacture of better padlocks that put an end to the Smokehouse around 1910. 18-8 stainless steel screw nails have good corrosion resistance and may be mildly magnetic. despite their varied sizes, you can often use a smaller size with a larger screw. It has been thought that such devices were used to. Made of 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. 2 in stock Aisle 13, Bay 005. The slotted screw drive – also known as flat-head – is the oldest type of drive that simply features a straight slot across its head. A Robertson screw, also known as a square screw [1] or Scrulox, [2] is a type of screw with a square -shaped socket in the screw head and a corresponding square protrusion on the tool. Brass Machine Screws — History & Manufacturing. Torx drive is a trademark commonly referred to as star drive or, simply, a six-lobe. Choose from a range of period authentic finishes to match your hardware, new or old. Torx (pronounced / tɔːrks /) is a trademark for a type of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 [1] by Camcar Textron. Suppose the thimble were screwed out so that graduation 2, and three additional sub-divisions, were visible on the sleeve (as shown in the image), and that graduation 1 on the thimble coincided. ONLY 11. Flathead screws are also commonly used for securing hinges, mounting plates, and other hardware. By 1940, most American automakers used Phillips screws. Invented at the same time as the crown cork, it is the original bottle opener. And in the early 20th century, the Phillips head screws were made. Rybczynski (2000) describes a flurry of patents for alternative drive types in the 1860s to the 1890s in the U. This should be enough to either break through the paint, or put a dent into the screw head. Inventor Peter Lymburner Robertson came up with the idea in 1908 after cutting his hand with a slotted screwdriver. National Inventors Hall of Fame Inductee Henry Phillips invented the Phillips screw, where its significance lies in the self-centering property. The deeper the screw or bolt is sunk, the more secure it will be. Rectangular holes may indicate that the piece was built from 1800 to the 1880s. The two partners are kept together by a combination of their threads' friction (with slight elastic deformation ), a slight. Small (80 mm (3 + 5 ⁄ 32 in)) turnbuckle Turnbuckle diagramA turnbuckle, stretching screw or bottlescrew is a device for adjusting the tension or length of ropes, cables, tie rods, and other tensioning systems. Over time, manufacturers bred screws for. The history of the hinge stretches so far back into antiquity that archaeologists aren’t sure of its exact origin. They have a unique cross-like shape that helps to reduce cam-out, which is when the screwdriver slips out of the screw head during installation. S. Choose from our selection of sheet metal screws, including rounded head screws, flat head screws, and more. It is one of the oldest types of screwdriver. These metric 316 stainless steel screws resist corrosion from chemicals and salt water better than 18-8 stainless steel screws. Long-shanked screw eyes are termed 'vine eyes' and are used to attach support wires. In 1886, 10 percent of the nails that were made in the United States were of the soft steel wire variety and by 1892, steel wire nails overtook iron cut nails as the main type of nails that were being produced. Even when screws were used, from their inception until the late 1800s slotted screws and drivers were the only option available. A 16th-century portable drum watch with sundial. Skateboarding, as it exists today, was probably born sometime in the late 1940s, or early 1950s, when surfers in California wanted something to do when the waves were flat. A steamboat is a boat that is propelled primarily by steam power, typically driving propellers or paddlewheels. Self-tapping. A Round Screw Head has a rounded or domed head. If this doesn't work, try using a smaller flat head to find a spot that will grab. By the 1820s, cast iron was also used to make flatirons. In 1867, he received U. What is a flat head screwdriver? A “slotted flat blade screwdriver” is a long standard. patent 67,665 for a press to insert the fastener into paper. 10-6 and 10-7). On June 6, 1882, Henry W. The modern screwdriver, as we now know it, was invented by Industrialist Henry F. Machine-Made Screws By the late 18th century screws with blunt ends were made by machine, and in the 1840s George Nettlefield began to produce the. The Wing. Available in interior and exterior styles. Flat Head Screw Assortments. The cheese head has cylindrical sides with a flat disc top and a flat bearing surface. Dome heads are a popular screw head type used to enhance various projects with an appealing aesthetic. It helped speed production, and was rapidly adopted by other Detroit automakers. Different types of screw heads include Slotted, Square or Robertson, Trox or Star, etc. Often believed that these clamps are called "C" clamps because of their C-shaped frame, or also often called C-clamps or G-clamps [1] because including the screw. Let us begin with the screw, a fastener that keeps the roof over our heads and the floor under our feet. Robertson Screw/Inventors When was the first wood screw invented? The earliest record of lathe made wood screws dates to an English patent of 1760. A screw driver or drill can be used to drive a screw into place. The Type 17 auger point and narrow body penetrate softwood and plastic-wood composite decking material. 2-7/8-in Black Ecoat Flat-Head Exterior Structural Wood Screws (50-Pack) Model # FMHLGM278-50. Where Flathead screws will be used to fix bookcases and cabinets etc, Roundheads may be used on. #17 Self-drilling Screw. In 1770, English instrument maker, Jesse Ramsden (1735-1800) invented the first satisfactory screw-cutting lathe. The half of the screw that remains visible when screwed into the surface is rounded and domed. Some historians suggest that they may have been used in ancient Egypt, while others believe that they were first used in Europe during the 16th century. Flat heads are countersunk into wood for a flush installation. Because there is still a lot of tooling for flat head screws, from the manufacturing of, to the screwdrivers in your home. The LOX-Recess screw drive was invented by Brad Wagner, and fasteners using it are distributed by licensees Hitachi,. Both the tool and socket have a slight taper. Choose a length that will penetrate the lowest board by 2/3 of its thickness. One of the first applications of the screw principle was in presses for the extraction. The Electric Iron. Information on Screw Threads. These were common in GM automobiles, trucks and buses of the 1940s and 1950s. Thompson, who wasn’t able to muster up any commercial interest for his screwhead. The one on the right is twice as strong as the one on the left because it would have to shear the bolt off in two places to become free. Upsize the Tip. These tools were developed in the 19th century as an improvement over flathead screwdrivers because the shape of the screwdriver head provides better traction or grip when you are driving or removing screws. Instrument maker Jesse Ramsden invented the first screw-cutting lathe in 1770, which inspired subsequent inventors to create machinery for mass production of. Heely’s 1888 British patent on a corkscrew he called the A1 Heeley Double Lever. Once the torque was a little bit larger, it was easy to slip and hurt, and this injury directly contributed to Roberston's way of reducing slip and increasing torque when screwing. In its modern form, the flat-head screwdriver was probably invented in about 1744 in England, where it was known as a "turn-screw"—a type of bit used as an attachment in a carpenter's brace-and-bit tool. The standard specifies the dimensions, materials, mechanical properties and marking of. The double-lever, rack-and-pinion “Wing” corkscrew has its origins in H. Hereof,who invented flat head screws? Henry18th century and earlier - Prior to the early 19th century, most screws were made by hand. Made from 18-8 stainless steel, these metric button head screws have good chemical resistance and may be mildly magnetic. Prior to this invention, the lathes that produced screws couldn’t produce the tapering that is featured on modern screws. I’m prepared to be corrected, but I’ve been taught that “flathead screws” are of a shape meant to be installed flush with the surface. The exact origin of flat head screws is not known, but it is believed that they have been in use for several centuries. L. The screws will not be uniform with heads off center and slots off center on the heads. 6,913 products. In my case here, I had a 5/8″-thick top, so the screw projects past the edge of the skirt 1/2″. P. No. Most can meet either the ASTM A194, ASTM A563, or ASTM F594 standard. A wingnut, wing nut or butterfly nut is a type of nut with two large metal "wings", one on each side, so it can be easily tightened and loosened by hand without tools. It helped speed production, and was rapidly adopted by other Detroit automakers. Both can be read about on this timeline. * Some exclusions applyView Details. Between 1770 and 1798, Jesse Ramsden, an English musical instrument maker, Henry Maudslay, an English engineer, and David Wilkins, an. This 17 piece kit includes 9 Flatheads/slotted screwdrivers and 7 Phillips screwdrivers plus a 4 in 1 pocket. Robertson invented a square-head screw. Using a pilot hole slightly smaller than the wood screw diameter is suggested to prevent splitting. Flat head screws can have philips, hex, or slot drives. Hex Screwdriver or Hexagon Screwdriver. As screws have changed throughout the decades, they can be used to help age an object. Used in bolts, nuts, and a.