A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 6110-01-323-7617
NSN 6220-01-432-2831
NSN 6645-01-411-5657
NSN 6135-00-170-8819
NSN 5935-00-820-1892
NSN 5855-01-147-4785
NSN 6685-01-490-7623
NSN 6220-01-546-4442
NSN 6610-01-365-7796
NSN 6110-01-534-4275
NSN 6620-01-210-4401
NSN 6130-00-064-0678