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 6620-01-201-6080
NSN 5965-00-052-9184
NSN 6645-01-556-5263
NSN 6135-01-393-4746
NSN 5998-00-754-5186
NSN 5965-00-578-1438
NSN 2925-01-359-4027
NSN 5990-00-883-8819
NSN 6320-01-458-1853
NSN 6135-01-186-4010
NSN 5945-00-777-3404
NSN 6130-01-088-8542