#4-48 Button Head Socket Cap screws. These are made from Alloy Steel with Thermal Black Oxide coating.
Thread Size: 48 TPI - Fine Thread
Length: Please select from menu above.
Type: Button Head Cap Screw
Matching Nut & Washers: #4-48 - Available here
System of Measurement: U.S. / Inch
Material: Alloy Steel with Thermal Black Oxide
Specifications: ANSI/ASME B18.3, ASTM F879