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 6610-01-085-0831
NSN 5985-00-855-6727
NSN 5990-00-719-4947
NSN 6650-01-038-9079
NSN 6145-01-414-1493
NSN 5999-01-063-7408
NSN 5905-01-230-0392
NSN 5915-00-891-8158
NSN 6650-00-518-5194
NSN 5905-01-336-9461
NSN 5835-00-378-1429
NSN 6685-00-006-3537