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 2925-01-464-6127
NSN 6220-01-381-7129
NSN 5835-01-297-1909
NSN 5985-01-622-1540
NSN 5910-00-102-5668
NSN 6645-01-130-9393
NSN 5915-01-246-5027
NSN 6110-00-860-9659
NSN 5915-01-459-8059
NSN 6685-01-217-0284
NSN 5996-01-068-2886
NSN 5855-01-109-6433