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 6685-01-338-8455
NSN 5920-01-273-3144
NSN 5855-01-512-1926
NSN 5925-00-067-8322
NSN 5996-01-069-5027
NSN 5985-01-150-4451
NSN 5915-01-487-6454
NSN 5945-01-573-4144
NSN 6150-01-546-5004
NSN 2925-01-104-8163
NSN 6650-01-559-7635
NSN 5835-01-294-5753