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 5999-01-273-7322
NSN 6685-01-181-3125
NSN 6645-01-469-0192
NSN 5910-01-420-5794
NSN 6135-00-932-3136
NSN 5910-01-381-3009
NSN 5930-00-300-0683
NSN 4140-00-635-9195
NSN 5960-01-388-4951
NSN 6135-01-048-0910
NSN 6620-01-629-4045
NSN 6110-01-408-5621