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 5960-01-411-5899
NSN 6135-01-324-7718
NSN 5915-01-104-9078
NSN 5915-00-865-7977
NSN 5996-00-593-6973
NSN 5925-00-539-8372
NSN 5945-01-010-7931
NSN 5945-00-117-3520
NSN 6150-00-779-5547
NSN 5925-00-248-2959
NSN 7035-01-548-3126
NSN 5915-01-054-6598