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Your cart is empty.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 10Pieces Insert Size (ID/OD) 5/16 / 0.38 Material 8740 Chrome Moly OD 0.625
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