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 5996-01-420-6525
NSN 6145-00-982-0860
NSN 5950-01-025-4751
NSN 6145-00-570-0516
NSN 6130-01-249-0795
NSN 5998-01-467-2979
NSN 6645-00-960-6594
NSN 5915-01-313-5149
NSN 4140-00-631-7178
NSN 4140-01-175-0919
NSN 6135-01-309-5765
NSN 6685-01-081-2694