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 6610-00-469-8534
NSN 4140-00-944-5190
NSN 5930-01-415-3111
NSN 5945-00-228-2976
NSN 5855-01-167-2162
NSN 6240-00-925-0841
NSN 6320-00-336-9123
NSN 5910-01-138-6313
NSN 5985-01-207-6351
NSN 5915-01-113-1576
NSN 6135-01-344-2442
NSN 5920-01-440-5629