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 5835-01-557-4914
NSN 5975-00-614-3555
NSN 6645-00-456-2923
NSN 4140-01-232-0537
NSN 6220-01-578-5724
NSN 6150-00-485-8853
NSN 6610-00-216-6538
NSN 5960-01-076-4708
NSN 5835-00-572-7445
NSN 6620-00-994-4917
NSN 6145-00-278-0697
NSN 6620-01-633-8443