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 5950-00-914-5246
NSN 4140-01-338-1147
NSN 5999-01-519-7910
NSN 6130-01-487-5349
NSN 6620-00-456-0404
NSN 5895-01-051-1164
NSN 6145-00-859-2522
NSN 5975-00-954-7961
NSN 5965-01-513-6540
NSN 5910-01-369-6379
NSN 6610-01-100-3662
NSN 5985-00-945-0432