#4-40 Flat Head Socket Cap screws. These are countersunk screws that are made from Alloy Steel with Thermal Black Oxide coating.
Thread Size: 40 TPI - Coarse (Standard) Thread
Length: Please select from drop down menu above.
Type: Flat Head Socket Cap Screw
Matching Nut & Washers: #4-40 - Available here
System of Measurement: U.S. / Inch
Material: Alloy Steel with Thermal Black Oxide
Specifications: ASTM F835, 82° Head (Standard)