ARP Insert Washer 1pc ID/OD: 5/16 / 0.38 8740 Chromemoly OD: 0.625
These handy washers are made to protect the top of holes from galling or collapsing around studs or bolts. They're ideal for head bolt holes, mid-motor plates, or any other high-wear area that requires a washer. Easy to install by just oversizing hole and pressing in washer. ARP Insert Washers are fully CNC machined from premium thru-hardened 8740 stock.
- Insert Washer Single Piece
- Insert Size (ID/OD): 5/16 / 0.38
- Material: 8740 Chrome Moly
- OD: 0.625
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