Called washer, seal
A washer of various shapes having a centrally located hole. It is primarily used as a seat for a bolt or screw to distribute pressure and has a sealing element. It may be used in connection with metallic washers to which it can be bonded.
NSN 6145-01-547-6651
NSN 5999-01-078-2528
NSN 6220-01-440-9763
NSN 6685-00-270-8070
NSN 5925-01-370-1818
NSN 5975-01-397-6380
NSN 7035-00-849-5526
NSN 5965-01-292-9163
NSN 6145-00-956-6118
NSN 6220-01-190-0627
NSN 5920-01-153-2690
NSN 5855-01-541-5569