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 5855-00-487-9691
NSN 6130-01-237-2358
NSN 5990-01-474-3477
NSN 5920-01-050-7474
NSN 5945-00-340-2819
NSN 5910-00-378-4725
NSN 6620-00-942-1751
NSN 6685-00-215-8894
NSN 6620-01-262-9489
NSN 6220-00-825-1808
NSN 6130-01-106-3649
NSN 5975-00-414-7143