Stud - 9/16-12 and 9/16-18 in Thread - 5.250 in Long - Broached - Chromoly - Black Oxide - Universal - Each. Manufacturer: ARP (Automotive Racing Products). Automotive Racing Products (ARP) started in 1968, in Southern California.
ARP M10 x 1.25 ARP 2000 Stud w/ Guide (one stud) - AM3.935-2GB
ARP HEADER STUD KIT 400-1412 SB CHEVY 3/8 DIAMETER STUD 3/8 SIZE QTY 12
ARP HEADER STUD KIT 400-1402 SB CHEVY 3/8 DIAMETER STUD 3/8 SIZE QTY 12
ARP HEADER STUD KIT 400-1414 FORD 3/8 STUD 3/8 SIZE 1.670 UHL QTY 16
ARP HEADER STUD KIT 400-1403 BB CHEVY 3/8 DIAMETER STUD 3/8 SIZE QTY 16
ARP Head Stud Kit 153-4001; Hex Stud Chromoly for 89-95 Ford Super Coupe 3.8L
