MonsterBolts - #4-40 x 5/16' Flat Head Socket Cap Screws, ASTM F8356, Alloy Steel, Black Oxide, 10 Pack
- Diameter - Thread Pitch : #4 - 40 UNC / Coarse Thread.
- Type : Flat Head Socket Cap Screw, Hex Drive.
- Material : Alloy Steel with Thermal Black Oxide.
- Specifications : ASTM F835 - Countersunk 82° Head (Standard).