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 6685-01-454-6520
NSN 5960-00-916-3859
NSN 6610-01-236-2510
NSN 5835-01-306-5511
NSN 5925-00-676-1797
NSN 6650-01-254-7981
NSN 6220-01-013-4559
NSN 5835-01-313-7054
NSN 6105-00-866-6094
NSN 6240-01-561-2944
NSN 5950-01-534-7890
NSN 6685-00-313-9239