Tamper Resistant Fasteners

Tamper resistant fasteners (a.k.a. security fasteners) require special drivers or tools to install and remove. Some types cannot be removed once installed. Tamper resistant fasteners are commonly used in public spaces to reduce the risk of tampering or unauthorized removal.

Machine Screws

Screws with machine threads for use with a nut or in a tapped hole.

PanFlatButtonRoundTrussOval

Star pin-in

Star pin-in flat

Star pin-in button

Spanner
(snake eyes)

Spanner pan

Spanner flat

Spanner oval

One-way

One-way round
View our full selection of Machine Screws


Sheet Metal Screws

Screws with large threads for use in sheet metal sometimes also used in plastic, fiberglass, or wood.

PanFlatButtonRoundTrussOval

Star pin-in

Star pin-in flat

Star pin-in button

Spanner
(snake eyes)

Spanner pan

Spanner flat

Spanner truss

Spanner oval

One-way

One-way round
View our full selection of Sheet Metal Screws


Sex Bolt and Mating Screws

Sex bolts resemble machine screws, but with internal threads, and can be used with either specialized mating screws or standard machine screws. Also known as barrel nuts and Chicago bolts.

Sex boltsMating screws

One way

One-way truss, serrated

One-way truss, serrated
View our full selection of Sex bolt and Mating screws


Driver Bits

Standard 1/4" insert bit5/16" shank insert bitPower bit

Star pin-in

Star pin-in insert bits

Star pin-in 5/16" insert bits

Spanner
(snake eyes)

Spanner insert bits

One way
(slotted driver)

Slotted insert bits

Slotted power bits
View our full selection of Driver Bits