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 5920-01-193-1356
NSN 6150-01-032-4556
NSN 6150-01-173-5188
NSN 6150-00-923-4476
NSN 5930-00-421-3246
NSN 5975-01-542-9066
NSN 5999-01-056-4490
NSN 5975-01-029-4879
NSN 5975-01-218-7186
NSN 6135-01-421-7168
NSN 5915-01-431-9754
NSN 6145-01-524-3687