Cylindrical head with a flat chamfered top surface.
Knurled cylindrical sides and hexagonal recess.
Ideal for precision assembly work with close tolerances, and applications needing a well tooled appearance.
Supplies greater tensile strength than equivalent sizes of grade 5 and grade 8 hex cap screws while requiring less surface area or counterbore since the fastener is internally wrenched.
Plain black finish.
Diameter: 5/16-18″
Length: 1″
Made from alloy steel. Cylindrical head with a flat chamfered top surface. Knurled cylindrical sides and hexagonal recess. Ideal for precision assembly w