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 5975-00-189-0857
NSN 5975-00-690-9061
NSN 5950-01-381-1361
NSN 6645-01-200-5289
NSN 5985-01-208-4835
NSN 5950-00-045-6944
NSN 6620-01-355-8904
NSN 6105-01-233-4466
NSN 5895-01-479-5031
NSN 6150-01-592-2493
NSN 6650-01-375-0507
NSN 6645-00-469-5963