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 5999-01-092-1865
NSN 7035-01-352-6235
NSN 6610-00-236-7175
NSN 5905-01-432-1961
NSN 6220-00-880-3181
NSN 6105-01-446-4233
NSN 5950-01-118-0419
NSN 5975-00-057-9415
NSN 6220-01-625-0816
NSN 6135-01-347-0201
NSN 6145-00-104-7789
NSN 6150-01-246-0319