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 5960-00-774-6338
NSN 6645-01-451-9735
NSN 5925-01-277-1677
NSN 6145-01-394-3122
NSN 2925-01-222-7764
NSN 5935-01-319-4511
NSN 5905-00-932-2971
NSN 5915-01-293-3847
NSN 5960-00-990-6850
NSN 5975-00-117-9515
NSN 6145-00-854-1892
NSN 5925-00-615-8777