Company looks for a supplier of stud Bolts Class 600 for gas lines Each Full Threaded stud bolt ASTM A193 GR.B7 with 2 Nos. Hexagonal Nuts ASTM A194 GR.2H along with 2 Nos. Steel Washers. Stud Bolt Dimensions ANSI B16.5, Threads shall be in accordance wit ANSI/ASME B-1, 20.1 Manufacturers must be ISO 9001 or ISO 9002 Certificated.