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 5990-01-463-2279
NSN 6685-01-121-2193
NSN 7035-01-114-3134
NSN 6145-01-593-9758
NSN 6320-01-426-8947
NSN 6610-01-503-0153
NSN 2925-01-157-9204
NSN 6110-01-282-4687
NSN 5910-00-957-7826
NSN 6610-01-167-8747
NSN 5920-01-617-3772
NSN 5985-01-524-5994