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 6135-01-422-1440
NSN 6620-01-631-7770
NSN 6110-01-310-2075
NSN 5999-00-264-9504
NSN 5998-00-438-4139
NSN 5999-01-215-6080
NSN 5960-01-461-9284
NSN 5935-01-218-4338
NSN 5855-01-145-4903
NSN 5990-01-600-8407
NSN 5935-00-430-1234
NSN 6240-01-200-0797