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Fastener Type Chartwww.boltdepot.com/toolsFastener CategoriesWood ScrewsMachine ScrewsScrews with a smooth shankand tapered point for use inwood. Abbreviated WS.Screws with threads for usewith a nut or tapped hole.Abbreviated MS.Self Drilling SMSA sheet metal screw with aself drilling point.Socket ScrewsSocket screws, also knownas Allen Head, are fastenedwith a hex Allen wrench.Hex BoltsBolts with a hexagonal headwith threads for use with anut or tapped hole. Abbreviated HHMB or HXBT.Lag BoltsBolts with a wood thread andpointed tip.Abbreviated Lag.Thread CuttingMachine ScrewsMachine screws with a threadcutting (self tapping) point.Carriage BoltsBolts with a smooth roundedhead that has a small squaresection underneath.Eye BoltsA bolt with a circular ring onthe head end. Used forattaching a rope or chain.Sheet Metal ScrewsFully threaded screws with apoint for use in sheet metal.Abbreviated SMS.Plow BoltsSimilar to carriage bolts butused for attaching the cuttingedge of a plow to the plowblade.Eye LagsSimilar to an eye bolt but withwood threads instead ofmachine thread.J-BoltsU-BoltsShoulder BoltsElevator BoltsJ shaped bolts are used fortie-downs or as an open eyebolt.Bolts in U shape for attachingto pipe or other roundsurfaces. Also available witha square bend.Shoulder bolts (also knownas stripper bolts) are used tocreate a pivot point.Elevator bolts are often usedin conveyor systems. Theyhave a large, flat head.Copyright 2000-2017 Bolt Depot Inc.

Fastener Type Chartwww.boltdepot.com/toolsFastener Categories (continued)Sex BoltsMating ScrewsHanger BoltsSet ScrewsSex bolts (a.k.a. barrel nuts orChicago bolts) have a femalethread and are used forthrough bolting applicationswhere a head is desired onboth sides of the joint.Mating screws have ashoulder that matches thediameter of the sex boltsthey are used with.Hanger bolts have woodthread on one end andmachine thread on the otherendMachine screws with no headfor screwing all the way intothreaded holes.Timber BoltsCotter PinsRivetsMachine threaded fastenerswith a wide domed head. Thehead has fins underneaththat prevent the bolt fromspinning during installation.Typically used in wood.Cotter or split pins have twotines which are bent apart tohold them in place.Used to join sheets of metal.During installation the rivetbody is deformed to permanently lock in place. Blindrivets can be installed withoutaccess to the back side ofthe material.Head StylesFlatOvalPanTrussA countersunk head with aflat top.Abbreviated FHA countersunk head with arounded top.Abbreviated OH or OVA slightly rounded head withshort vertical sides.Abbreviated PNAn extra wide head with arounded top.RoundA domed head.Abbreviated RHSlotted Hex WasherA hex head with built inwasher and a slot.HexHex WasherHex FlangeA hexagonal headAbbreviated HH or HXA hex head with built inwasher.A hex head with built inflange.ButtonSocket CapA low-profile rounded headusing a socket drive.A small cylindrical head usinga socket drive.Copyright 2000-2017 Bolt Depot Inc.

Fastener Type Chartwww.boltdepot.com/toolsDrive TypesPhillips and FrearsonSlottedCombinationSocket, Hex or AllenAn X-shaped drive.Abbreviated PH.A slot in the head.Abbreviated SL.A combination of slotted andPhillips drives.Abbreviated combo.A hexagonal hole for usewith an Allen wrench.One WaySquareStarInstalls with a normal slotteddriver but can not beremoved without specialtools.Also known as Robertsondrive.Abbreviated SQ or SD.A six-pointed star pattern,specifically designed toprevent cam-out and strippedheads.Washer TypesFlatFenderFinishingSplit LockA flat washer, used todistribute load. Available inSAE, USS and other patterns.An oversize flat washer usedto further distribute loadespecially on soft materials.A washer used to obtain a‘finished’ look. Usually usedwith oval head screws.The most common style ofwasher used to prevent nutsand bolts from backing out.External Tooth LockInternal Tooth LockSquareDockA washer with external‘teeth’. Used to prevent nutsand bolts from backing out.A washer with internal ‘teeth’.Used to prevent nuts andbolts from backing out.A square shaped washer.Dock washers have a largeroutside diameter and arethicker than standard.OgeeThick, large diameter, castiron washers with a curved orsculpted appearance.Typically used in dock andwood construction.Copyright 2000-2017 Bolt Depot Inc.

Fastener Type Chartwww.boltdepot.com/toolsNut TypesHexHeavy HexNylon Insert LockJamA six sided nut. Also referredto as a Finished Hex Nut.A heavier pattern version of astandard hex nut.A nut with a nylon insert toprevent backing off. Alsoreferred to as a Nylock.A hex nut with a reducedheight.Nylon Insert Jam LockA nylock nut with a reducedheight.WingA nut with ‘wings’ for handtightening.CapAcornA nut with a domed top overthe end of the fastener.Acorn nuts are a high crowntype of cap nut, used forappearance.FlangeTeeSquarePrevailing Torque LockA nut with a built in washerlike flange.A nut designed to be driveninto wood to create athreaded hole.A four sided nut.A non-reversible lock nutused for high temperatureapplications.K-Lock or KepCouplingSlottedCastleA nut with an attachedfree-spinning external toothlock washer.Coupling nuts are long nutsused to connect pieces ofthreaded rod or other malefasteners.Slotted nuts are used inconjunction with a cotter pinon drilled shank fasteners toprevent loosening.Castle nuts are used inconjunction with a cotter pinon drilled shank fasteners toprevent loosening.Pin LockA nut that does not requirean high installation torqueand can be installed andremoved without threaddamage.Copyright 2000-2017 Bolt Depot Inc.

Fastener Type Chartwww.boltdepot.com/toolsAnchoring ProductsStud AnchorsSleeve AnchorsLag ShieldsMachine Screw AnchorsA.k.a. Wedge Anchors. Onepiece expansion bolts forheavy duty fastening intostone or solid concrete.Heavy duty masonry anchors.Does not require a solid basematerial for installation.Medium dury anchors for usein concrete, brick or mortar.Use with a lag bolt.A two-piece machine threadanchor for use in stone, brick,or concrete.Drop-in AnchorsDouble Expansion SleevesConcrete ScrewsSpring Toggle WingsA heavy duty machine threadanchor for concrete or stone.Expansion anchor formasonry that ensures contactalong the length of the hole.Used in concrete, brick orblock. A quick and easy wayto fasten in light to mediumduty applicationsNon-removable fastenersthat expand behind thematerial, e.g. inside a wall, fora secure grip.Self Drilling DrywallAnchorsPlastic ToggleKaptoggle Conical AnchorsWhen these anchors aredriven in they expand insidethe hole for a secure grip.Drill hole the same size asthe anchor. Non-removable.A non removable anchorcommonly used for hollowspaces such as drywall andmasonry block.Plastic anchors used withsheet metal screws. Can beused in most materials.Wood Screw AnchorsHollow Wall AnchorsNail Drive AnchorsAnchor BoltsThis anchor is made of leadand can be used with woodscrews or sheet metalscrews.A.k.a. Molly Bolts. Used forlight duty anchoring indrywall or other hollow walls.Non removable anchors thatexpand inside the hole whenthe nail like pin is driven.L shaped, machine threadedanchors. Typically embeddedin concrete when it is poured.Quick-install plastic anchorsused in drywall with sheetmetal screws.Copyright 2000-2017 Bolt Depot Inc.

Fastener Type Chart Head Styles. Flat A flat washer, used to distribute load. Available in SAE, USS and other patterns. Fender An oversize flat washer used to further distribute load especially on soft materials. Finishing A washer used to obtain a ‘finished’ look. Usually used with oval head screws. Split Lock The most common style of washer used to prevent nuts and bolts from backing .