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 5965-01-512-1985
NSN 5996-01-375-0357
NSN 5996-00-115-6458
NSN 5965-01-187-0941
NSN 5945-00-234-0806
NSN 6685-00-274-5533
NSN 5895-00-783-3416
NSN 5985-01-521-4291
NSN 6105-01-399-0695
NSN 6220-01-241-4625
NSN 6145-01-555-4315
NSN 5996-01-014-6103