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 5996-01-322-4838
NSN 6145-01-438-3748
NSN 5965-00-892-1094
NSN 5915-01-231-5869
NSN 6685-01-318-9063
NSN 5960-00-872-0531
NSN 6650-01-560-8576
NSN 5996-01-461-3464
NSN 5960-00-201-5265
NSN 6240-00-541-7032
NSN 5990-01-598-8769
NSN 5965-01-156-4478