Profile Chromoly Female Hub Bolts

A. Butted Head Bolts - Replacement profile bolts for 3/8 (10mm) front/rear hubs. B. Volcano Bolts - 3/8" x 16 tpi fits Profile and Madera female axles, heat treated cromo bolt with aluminum Volcano washer, accepts 5/16" or 8mm hex wrench. C. Profile 17mm hex head bolts. Available in two versions: - 3/8 straight. 3/8 to 14mm adapter for 14mm drop outs. - 17mm hex head for use with a 17mm socket or 8mm allen wrench option. Heat treated and made out of 4140 chromoly.