Fastener Categories Wood Screws Screws with a smooth shank and tapered point for use in wood. Abbreviated WS Machine Screws Screws with threads for use with a nut or tapped hole. Abbreviated MS Sheet Metal Screws Fully threaded screws with a point for use in sheet metal. Abbreviated SMS Self Drilling SMS A Sheet metal screw with a self drilling point. Hex Bolts Bolts with a hexagonal head with threads for use with a nut or tapped hole. Abbreviated HHMB or HXBT
Carriage Bolts Bolts with a smooth rounded head that has a small square section underneath. Lag Bolts Bolts with a wood thread and pointed tip. Abbreviated Lag Set Screws Machine screws with no head for screwing all the way into threaded holes. Socket Head Socket Flat Head Wire Eye Bolt Shoulder Eye Bolt Wire Eye Lag Forged Eye Lag U-Bolt Socket Screws Socket screws, also known as Allen head are fastened with a hex Allen wrench. Eye Bolts A bolt with a circular ring on the head end. Used for attaching rope or chain. Eye Lags Similar to an eye bolt but with wood threads instead of machine thread. U-Bolts Bolts in U shape for attaching to pipe or other round surfaces. Also available with a square bend. J-Bolt Hanger Bolt J-Bolts J shaped bolts are used for tie-downs or as an open eye bolt. Hanger Bolts Hanger bolts have wood thread on one end and machine thread on the other end. Head Styles Flat Head Flat Head Profile Oval Head Oval Head Profile Pan Head Pan Head Profile Truss Head Truss Head Profile Flat A countersunk head with a flat top. Abbreviated FH Oval A countersunk head with a rounded top. Abbreviated OH or OV Pan A slightly rounded head with short vertical sides. Abbreviated PN Truss An extra wide head with a rounded top. Round Head Round Head Profile Hex Head Hex Head Profile Hex Washer Head Hex Washer Head Profile Slotted Hex Head Slotted Hex Head Profile Round A domed head. Abbreviated RH Hex A hexagonal Head. Abbreviated HH or HX Hex Washer A hex head with built in washer. Slotted Hex Washer A hex head with built in washer and a slot. Socket Cap Socket Cap Profile Button Head Button Head Profile Socket Cap A small cylindrical head using a socket drive. Button A low profile rounded head using a socket drive. Drive Types Phillips Drive Phillips Drive Top Slotted Drive Slotted Drive Top Combo Drive Combo Drive Top Allen Drive Allen Drive Top Phillips and Frearson An X shaped drive. Abbreviated PH Slotted A slot in the head. Abbreviated SL Combination A combination of slotted and Phillips drives. Abbreviated Combo Socket, Hex or Allen A hexagonal hole for use with an Allen wrench. Nut Types Hex A six sided nut. Also referred to as a finished hex nut. Nylon Insert Lock A nut with a nylon insert to prevent backing off. Also referred to as a Nylock Jam A hex nut with a reduced height. Nylon Insert Jam Lock A nylock nut with a reduced height. Acorn Nut Wing A nut with 'wings' for hand tightening. Cap A nut with a domed top over the end of the fastener. Acorn Acorn nuts are a high crown type of cap nut, used for appearance. Flange A nut with a built in washer like flange. Tee A nut designed to be driven into wood to create a threaded hole. Square A four sided nut. Prevailing torque lock A non-reversible lock nut used for high temperature applications K-Lock or Kep A nut with an attached free-spinning external tooth lockwasher. Coupling Nut Coupling Coupling nuts are long nuts used to connect pieces of threaded rod or other male threaded fasteners. Washer Types 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 out. Dock Washer External Tooth Lock A washer with external 'teeth' Used to prevent nuts and bolts from backing out. Internal Tooth Lock A washer with internal 'teeth' Used to prevent nuts and bolts from backing out. Square A square shaped washer. Dock Dock washers have a larger outside diameter and are thicker than standard. Ogee Washer Ogee Thick, large diameter, cast iron washers with a curved or sculpted appearance. Typically used in dock and wood construction ********************************************************************** This message and its attachments may contain legally privileged or confidential information. If you are not the intended recipient, you must not disclose or use the information contained in it. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete the e-mail. Any content of this message and its attachments which does not relate to the official business of Eraring Energy must be taken not to have been sent or endorsed by Eraring Energy. No warranty is made that the e-mail or attachment(s) are free from computer virus or other defect. ********************************************************************** [Non-text portions of this message have been removed]
