arp washer, hardened, high performance, flat, 12mm id, 19.1mm od, 3mm thick, chromoly, black oxide, each

ARP quality general purpose washers have an oversized I.D. to clear most under-bolt head radii. They're available in your choice of black oxide or rust-resistant stainless steel for 1/4, 5/16, 3/8, 7/16, and 1/2 in. shank bolts and studs. Whatever the application, these washers are sure to do the job.