Screws with a smooth shank and tapered point of use in wood. Abbreviated WS
Self Drilling SMS
A sheet metal screw with a self drilling point.
Screws with threads for use with a nit or tapped hole. Abbreviated MS
Bolts with a hexagonal head with threads for use with a nut or tapped hole. Abbreviated HHMB or HXBT
Thread Cutting Machine Screws
Machine screws with a thread cutting (self tapping) point.
Bolts with a smooth rounded head that has a small square section underneath.
Sheet Metal Screws
Fully threaded screws with a point use for sheet metal. Abbreviation SMS
Bolts with a wood thread and pointed tip. Abbreviation LAG
A six sided nut. also referred to as a finished Hex Nut
A heavier pattern version of a standard hex nut.
Nylon Insert Lock
a nut with a nylon insert to prevent backing off. also referred to as a nylock.
A hex nut with a reduced height.
Nylon Insert Jam Lock
A nylock nut with a reduced like flange.
A nut with “wings” for hand tightening.
A nut with a domed top over the end of fastener.
Acorn nuts are a high crown type of cap nut. used for appearance.
A nut with a built in washer like flange.
A nut designed to be driven into the wood to create a threaded hole.
A four sided nut.
Prevailing Torque Lock
A non-reversible lock nut used for high temperature application
External Tooth Lock
A washer with external “teeth” Used to prevent nuts and bolts from backing out
An oversize flat washer used to further distribute load especially on soft materials
A washer used to obtain a “finished look”. Usually used with oval head screws
The most common style of washer used to prevent nuts and bolts from backing out.