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 7035-01-118-5861
NSN 5855-00-832-9341
NSN 6620-00-405-4621
NSN 5985-01-512-0773
NSN 6135-00-422-3967
NSN 5990-01-582-1977
NSN 6650-01-330-1573
NSN 5999-01-564-9035
NSN 5985-00-117-4170
NSN 6610-00-186-9180
NSN 5975-01-127-1314
NSN 5925-00-229-3519