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 5935-01-505-1302
NSN 5945-01-494-1428
NSN 5990-01-030-5206
NSN 6110-01-407-8339
NSN 6145-00-144-0918
NSN 5935-01-159-9563
NSN 6320-01-652-3806
NSN 5950-01-248-2241
NSN 5996-01-369-4964
NSN 5915-01-182-3341
NSN 6130-01-191-5087
NSN 5990-01-433-3786