They are 1/2" dia. X 4.250" long. Fit BBC 366, 396, 402, 427, 454s. Threads are 1.000" long on each end w/ Coarse and Fine on the ends.
10 NEW ARP Hardened 12 Point Balancer Bolts 12MM x 1.50 x 1.800" Long NASCAR
NEW ARP 208-4301 12-Point Head Stud Kit For Honda D16A / D16Z
ARP M10 x 1.5/1.25 . 5.5in Length ARP Stud (One Stud) - AM5.500-2B
(12-Pk) SC Parts ARP Stud Kit Cylinder Head Chrome Moly 538928
ARP 354-2103 Intake Manifold Stud, 12 Point Nuts, Stainless, Polished, Small Blo
ARP Oil Pan Stud - 12 Point Nuts - Stainless - Polished - Small Block Ford - Kit