Head Set, Product Type Head Set, Compatible Thread Size #4-40, Compatible Rivet Nut Body Type Hex, Material Steel, Overall Length 1 3/4 in, System of Measurement Inch, Compatible Insert Type Rivet Nuts, Compatible with Manufacturer Model Number FL5-HS-00754, FL5-HS-00854, FL5-HS-09154, M-0440-200, Includes Headset Only