Brand: Automotive Racing Products (ARP)
These hardened, parallel-ground 3/8" ID chrome moly washers are a perfect match for ARP black oxide bolts. The 5/8" OD matches 3/8" ARP bolts with a 3/8" hex or 12-point head. It is also the same OD as AN960-616 washers, but the 0.120" thickness is almost like stacking two AN960s. The ID is not chamfered (both sides are flat). Black oxide finish. Sold in packs of 10.