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 6145-00-181-9622
NSN 5835-01-398-3859
NSN 5925-01-362-8044
NSN 5945-00-161-5109
NSN 6150-01-350-7060
NSN 5975-01-450-7868
NSN 5985-01-312-4125
NSN 6130-01-556-4260
NSN 5945-00-142-0005
NSN 5996-00-141-3945
NSN 5905-00-261-3418
NSN 5930-01-029-9959