ARP 301-8343 12-Point Nuts - 5/16-18" Thread (Set of 10)

ARP nuts are made from aerospace-quality material with 12-point style heads. 12-Point Nuts - 5/16-18" Thread (Set of 10). ARP 250-3021 9in Pinion Support Stud Kit 6pt. ARP Bolts 100-1202 Big Block For Chevy & Ford 3/8" 12pt header bolt kit.