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 6135-01-067-8331
NSN 5855-01-606-3587
NSN 6145-00-170-7947
NSN 6135-01-590-8320
NSN 6145-00-452-4501
NSN 6145-01-280-6131
NSN 5925-00-229-3519
NSN 6650-00-925-1274
NSN 5935-00-432-0918
NSN 6645-00-279-1777
NSN 5999-00-186-3976
NSN 5990-00-070-9608