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 6220-01-173-7860
NSN 5965-01-503-0358
NSN 5855-00-411-8688
NSN 5965-01-473-6082
NSN 5920-01-025-6989
NSN 6685-01-157-6932
NSN 4140-01-188-2871
NSN 2925-01-655-0562
NSN 2925-01-167-6500
NSN 6220-00-893-9776
NSN 5925-00-284-3726
NSN 5990-01-507-1479