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 6320-01-141-3791
NSN 5910-01-406-4317
NSN 5975-00-186-8884
NSN 5920-00-784-5214
NSN 6145-01-089-9879
NSN 6150-00-438-4940
NSN 5975-01-163-6315
NSN 5915-01-464-9287
NSN 6145-00-054-6744
NSN 5990-00-308-2538
NSN 6220-01-283-1294
NSN 5910-00-687-1254