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 6130-01-361-6475
NSN 5920-00-081-3850
NSN 5835-01-044-2628
NSN 5905-00-842-0167
NSN 5895-00-912-4745
NSN 6685-01-436-3149
NSN 6135-00-998-5884
NSN 5915-01-474-8187
NSN 5910-01-111-4495
NSN 5950-01-627-5415
NSN 2925-01-228-6554
NSN 6220-01-376-1507