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 5935-01-163-9137
NSN 5915-01-433-6013
NSN 6685-01-065-2177
NSN 6145-01-304-3718
NSN 5905-01-537-0022
NSN 5965-01-036-1325
NSN 5905-01-537-8473
NSN 6645-01-361-4813
NSN 6620-01-540-5712
NSN 5905-01-556-9079
NSN 6650-00-514-3531
NSN 4140-00-900-1816