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 6145-01-534-0390
NSN 6685-01-431-7927
NSN 5905-00-314-4602
NSN 5835-00-059-5854
NSN 5985-01-583-8437
NSN 5915-01-509-7206
NSN 5925-00-660-7589
NSN 7035-00-104-7613
NSN 6645-00-933-2170
NSN 6110-01-262-2353
NSN 6645-01-400-2119
NSN 5855-01-312-5160