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 5990-01-252-8175
NSN 5999-01-420-8903
NSN 5950-01-431-9068
NSN 6645-00-916-5615
NSN 6110-01-315-0815
NSN 5990-00-965-0495
NSN 5975-01-266-1706
NSN 5930-00-100-3938
NSN 5965-01-467-3203
NSN 5950-00-595-8113
NSN 6685-00-027-7186
NSN 6650-01-213-1231