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 5999-01-174-0450
NSN 5999-01-301-6497
NSN 5905-01-040-1702
NSN 7035-00-275-5604
NSN 5935-01-259-4935
NSN 5930-00-485-9194
NSN 6135-01-056-4609
NSN 5935-00-785-6501
NSN 7035-00-495-2137
NSN 5925-00-321-8040
NSN 5835-00-198-4936
NSN 6135-00-010-5275