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 5915-00-480-5163
NSN 5950-01-596-5787
NSN 6145-00-961-0775
NSN 6105-00-726-2754
NSN 5960-00-754-7340
NSN 6685-01-250-2669
NSN 5998-01-557-1060
NSN 5990-00-557-8726
NSN 5915-01-585-2987
NSN 6105-00-557-8962
NSN 6150-01-504-4734
NSN 5950-00-456-0665