STUD BOLT CARBON STEEL C/WITH 2 NUT 5/8" X 4 1/4" ANSI B1.1 ASTM A193 FOR STUD - ASTM A194 FOR NUT 5000 pcs. STUD BOLT CARBON STEEL C/WITH 2 NUT 3/4" X 4 1/2" ANSI B1.1 ASTM A193 FOR STUD - ASTM A194 FOR NUT 5000 pcs.