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 6145-01-063-8318
NSN 6110-01-382-9706
NSN 5960-01-010-3083
NSN 6620-01-236-6290
NSN 6130-01-381-5671
NSN 6685-01-218-0792
NSN 6650-01-102-3422
NSN 6320-01-264-7506
NSN 5950-01-070-5935
NSN 5920-00-917-6824
NSN 6130-01-068-4475
NSN 7035-01-576-9455