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 5910-00-874-6889
NSN 5920-00-196-3631
NSN 6110-01-319-5570
NSN 5985-01-243-0495
NSN 5950-00-219-6537
NSN 5925-01-277-9592
NSN 4140-00-490-0630
NSN 6685-00-994-1027
NSN 6650-00-149-8865
NSN 5920-01-019-9861
NSN 6220-01-210-8141
NSN 5990-01-015-5968