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Hardened steel/black phosphate finish for economical performance
These flat head, machine screw threaded fasteners are made for attaching wood floors to steel runners, which is an increasingly popular practice. Their special ‘F-type’ or thread-cutting point is intended to minimize vibration and provides high resistance to torque, shear, and tension. The F-Type point isn’t a self-drilling point, however, so please pre-drill a 7/32” pilot hole when using these items.