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 6650-00-677-2577
NSN 6220-01-556-8043
NSN 5999-01-645-4854
NSN 4140-01-066-7883
NSN 5855-00-058-1293
NSN 2925-01-525-8212
NSN 5965-01-205-6249
NSN 5999-00-452-6389
NSN 5835-01-143-9143
NSN 2925-01-370-6898
NSN 5925-01-484-6975
NSN 5975-01-423-8280