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ARP 5/16-24 x 1.125 12‑point black oxide chromoly bolts are specified for applications needing a 1.125" length with 5/16-24 threading and a 12‑point head. The listing indicates a chromoly bolt in black oxide finish at the stated length, supplied to meet exact fastener length and head style requirements. Choose this size when the assembly calls for 5/16-24 thread, a 12‑point seating, and the black oxide appearance and protection.
ARP 5/16-24 X 1.125 12pt black oxide bolts
