... Co.,Ltd is one of the leading China tap bolts manufacturers and suppliers,Website:http://www.zhenyafastener. ... productive factory is able to produce CE certification tap bolts at both high quality and low price. ... head. Minimum tensile strength = 150 Ksi. TAP BOLTS Tap bolts do not have a washer faced bearing ... currently only available in Grade 2 steel. Hex Tap Bolts, Zinc Plated, A2,A4 The information ...