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 6110-01-442-5601
NSN 5960-01-205-0386
NSN 5998-01-557-1500
NSN 5950-01-248-9578
NSN 5998-01-514-2816
NSN 6135-01-328-6583
NSN 5999-01-445-2835
NSN 5999-01-348-8871
NSN 6105-01-147-5586
NSN 5990-01-584-8363
NSN 6145-00-248-8965
NSN 6105-00-592-7242