1/2-13 X 1 1/4 HEAVY HEX BOLT B-7
1/2-13 X 1 1/4 HVY HEX BOLT A193 B-16
1/2-13 X 1 1/4 HEAVY HEX BOLT A193 B7 ZI
1/2-13 X 1 1/4 HEAVY HEX BOLT A325 W/OMC CERTS MUST ACCOMPANY PARTS