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 6685-01-106-0962
NSN 5965-00-113-9748
NSN 2925-00-136-2612
NSN 5975-00-301-1537
NSN 5998-01-160-7099
NSN 5999-01-604-1450
NSN 5960-01-346-6002
NSN 7035-01-279-2815
NSN 5945-01-534-6123
NSN 6610-01-476-7412
NSN 6650-01-046-3718
NSN 5925-01-047-8884