HEX.BOLT, 1-1/2" - 8 UNC, 5-1/2" ( L), FULLY THREADED HEAVY ALLOY STEEL ASTM A193 GRADEB16- 256 PC HEX.BOLT, 1-1/2" - 8 UNC, 4-1/2" ( L), FULLY THREADED HEAVY ALLOY STEEL ASTM A193 GRADE B16 -544 PC HEX.BOLT , 1" - 8 UNC, 4" ( L), HEAVY ALLOY STEEL ASTM A193 GRADE B16- 256 PC HEX.NUT 1-1/2" - 8 UNC, ALL METAL TOP LOCK, ALLOY STEEL ASTM A194, GRADE B4-512 PC HEX.NUT 1" - 8 UNC, ALL METAL TOP LOCK, ALLOY STEEL ASTM A194, GRADE B4-256 PC USING FOR EXHUST LINE. QUOTE SAME GRADE OR HIGHER