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 6150-01-300-4475
NSN 5990-00-816-9289
NSN 5895-01-292-0948
NSN 5905-00-392-0122
NSN 6145-00-332-4988
NSN 5998-00-549-2661
NSN 5930-01-356-8454
NSN 6220-00-920-8225
NSN 5915-01-550-1879
NSN 5975-01-603-2801
NSN 6685-01-448-4056
NSN 2925-01-623-9285