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 6685-01-170-5651
NSN 5985-01-382-1742
NSN 5999-01-468-2028
NSN 6610-01-309-5361
NSN 5950-01-487-0377
NSN 6130-01-502-8877
NSN 6130-00-186-8460
NSN 2925-00-071-4197
NSN 6135-01-263-4073
NSN 6105-01-155-4041
NSN 7035-01-379-6978
NSN 5910-01-497-7864