Item description for 1/4"-20 x 1-1/4" Black Oxide Steel Coarse Thread Socket Set Screws (10 pcs.)

Diameter: 1/4"
Length: 1-1/4"
Material: Steel
Finish: Black Oxide
Driver Type: Hex
Thread Size: 20 (Coarse)
Type: Socket Set Screw

Box of 10.

A socket set screw is the most common set screw, which is tightened or loosened with a hex key.