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 6610-01-158-2988
NSN 6145-01-025-5840
NSN 5905-01-457-9072
NSN 6105-01-461-9317
NSN 6650-01-388-4363
NSN 6145-00-759-6745
NSN 6685-01-132-1744
NSN 5925-00-923-3960
NSN 5855-00-757-5149
NSN 5835-01-005-8564
NSN 5935-01-605-4194
NSN 5999-01-133-6465