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 5905-01-121-1508
NSN 5925-01-497-9874
NSN 6650-00-778-2949
NSN 5965-00-458-7321
NSN 5855-00-167-7893
NSN 5855-01-147-4785
NSN 5998-01-442-5829
NSN 6135-01-052-9634
NSN 6685-00-959-8815
NSN 6685-00-187-5890
NSN 6620-00-104-6937
NSN 5915-00-454-1675