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 5999-01-062-0739
NSN 5935-01-012-3082
NSN 6685-01-318-5042
NSN 6110-01-561-6609
NSN 7035-00-152-6485
NSN 5999-00-175-2346
NSN 7035-00-436-1229
NSN 6135-01-348-8264
NSN 5920-01-078-6438
NSN 2925-00-333-4702
NSN 6135-01-275-9767
NSN 5998-00-528-0615