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 6220-01-554-2501
NSN 6645-00-234-3873
NSN 5996-00-759-5025
NSN 2925-01-625-6841
NSN 5905-01-542-9115
NSN 5925-01-102-8482
NSN 6105-00-909-4561
NSN 5945-00-952-2511
NSN 5925-00-245-3391
NSN 2925-01-243-0328
NSN 5905-00-412-1708
NSN 6110-00-857-4274