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 5975-00-276-7559
NSN 5835-00-198-4936
NSN 6320-00-149-7570
NSN 5905-00-167-6872
NSN 5925-00-368-1291
NSN 5945-01-218-5532
NSN 6150-01-634-0575
NSN 5985-00-859-7059
NSN 5910-01-312-9783
NSN 6220-01-600-5625
NSN 6685-01-572-9290
NSN 5895-00-280-2811