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 7035-01-331-5614
NSN 5930-01-596-1766
NSN 5930-00-431-4818
NSN 4140-01-215-6672
NSN 5960-01-512-0233
NSN 5920-01-631-6457
NSN 5855-00-150-1820
NSN 5998-01-230-0555
NSN 5996-00-619-3378
NSN 5985-01-399-7713
NSN 6685-01-132-4168
NSN 6650-00-557-5482