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 7035-00-104-7613
NSN 5996-01-479-9637
NSN 2925-01-212-1040
NSN 6620-00-925-8435
NSN 6610-00-175-5640
NSN 6220-01-191-7643
NSN 6130-00-098-7622
NSN 5999-00-959-7144
NSN 5935-00-021-9628
NSN 6145-01-375-9481
NSN 5945-01-202-8119
NSN 5920-01-514-7007