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 5990-01-517-7848
NSN 5905-01-238-7729
NSN 6220-00-925-9497
NSN 6105-00-003-6141
NSN 5855-00-411-8688
NSN 5920-01-548-0094
NSN 5925-00-516-2449
NSN 5855-01-528-2744
NSN 5930-00-018-6225
NSN 7035-01-579-4897
NSN 5910-01-351-2844
NSN 6320-00-174-1362