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 5960-00-161-3728
NSN 5950-01-434-8458
NSN 6645-01-440-5500
NSN 5905-00-094-6850
NSN 6150-00-234-6475
NSN 6130-01-585-9233
NSN 6620-00-905-6590
NSN 5925-00-644-5546
NSN 5855-00-466-2309
NSN 6650-00-503-1677
NSN 6220-01-100-7428
NSN 5910-01-086-2209