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 6240-01-415-5149
NSN 5910-00-202-1056
NSN 2925-00-816-8765
NSN 6620-00-269-5168
NSN 5950-01-535-6326
NSN 6645-01-227-2036
NSN 5855-00-058-1293
NSN 6645-00-832-1609
NSN 5930-00-644-9537
NSN 5920-00-900-8839
NSN 6685-01-596-9875
NSN 6645-01-657-2604