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 5925-01-113-7793
NSN 5835-01-407-5260
NSN 5905-00-206-1943
NSN 6645-01-325-5605
NSN 5930-01-258-9669
NSN 5985-01-265-0338
NSN 5895-01-513-1873
NSN 5990-01-411-5930
NSN 2925-01-588-3507
NSN 6135-01-534-3007
NSN 5910-00-158-5389
NSN 6650-01-502-2316