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 5920-00-391-6252
NSN 6685-00-868-2947
NSN 5998-01-634-0604
NSN 5895-01-602-8348
NSN 5950-01-319-9119
NSN 6650-00-238-1199
NSN 6650-00-111-3399
NSN 6650-01-003-9355
NSN 5925-01-354-1129
NSN 6240-01-171-0374
NSN 6130-01-187-3573
NSN 5990-01-514-8030