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 5999-01-537-7090
NSN 6610-01-357-1940
NSN 6135-01-517-6060
NSN 5965-00-139-1039
NSN 5935-01-406-5455
NSN 7035-01-512-1826
NSN 6645-01-603-9331
NSN 5945-00-773-3879
NSN 6610-01-425-1523
NSN 6130-01-025-6770
NSN 5985-00-947-8906
NSN 6130-00-205-1714