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 5975-01-530-6162
NSN 5895-01-268-8171
NSN 5835-01-102-4451
NSN 2925-01-115-8072
NSN 5930-00-903-3424
NSN 6620-01-222-2136
NSN 6110-01-603-9227
NSN 5960-01-018-1489
NSN 5945-01-008-1465
NSN 5925-01-413-1638
NSN 5960-00-297-7099
NSN 6135-01-538-7272