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 6220-01-614-0563
NSN 6105-01-420-9474
NSN 5855-01-246-0342
NSN 5999-01-346-7755
NSN 6645-01-057-7987
NSN 6685-00-164-4223
NSN 2925-00-786-6227
NSN 5930-00-133-4033
NSN 6145-01-250-0689
NSN 6135-00-958-7981
NSN 6610-00-132-3387
NSN 5998-00-999-3703