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 6320-01-021-6633
NSN 5910-01-260-7218
NSN 2925-01-248-6028
NSN 6150-01-651-8765
NSN 5985-00-892-1071
NSN 5965-01-314-3253
NSN 4140-01-397-7790
NSN 5915-01-421-9779
NSN 5835-01-351-3425
NSN 6110-00-244-1354
NSN 5905-00-304-4349
NSN 5990-01-485-0260