Stainless #4-40 x 3/8" (3/8" to 1-1/2" Available) Socket Button Head Cap Screws, Full Thread, Hex Drive, Stainless Steel 18-8, Machine Thread (4-40 x 3/8")

A button head socket cap screw is a screw with a button head and hexagon drive for tightening with an Allen-styles wrench.

This screw carries a recessed internal socket drive to add strength.

The 18-8 stainless steel material provides strength and offers good corrosion resistance in many environments.

The material may be slightly magnetic.

The button head is round with a low profile, short vertical sides and is suitable for light duty applications.

The internal hex drive, also known as a hex-socket drive, has a hexagonal slot that requires an Allen key driver, also known as a hex key or Allen wrench.

Socket cap screws are threaded fasteners that have a cap head with an internal socket drive for installing in areas with limited side clearance.