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 5950-00-160-8869
NSN 4140-01-412-0101
NSN 6650-00-177-0983
NSN 5910-01-615-5232
NSN 6685-01-482-7396
NSN 7035-00-116-1900
NSN 6645-00-522-4173
NSN 5835-01-612-4753
NSN 6135-01-017-3001
NSN 6620-00-946-2491
NSN 5999-01-282-9035
NSN 5950-01-480-0507