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 5925-01-575-1383
NSN 5965-01-626-5775
NSN 5950-00-069-2784
NSN 5998-01-039-1684
NSN 5895-01-406-3729
NSN 6685-00-084-7572
NSN 5905-01-006-5141
NSN 5895-01-256-0075
NSN 6110-01-280-2093
NSN 4140-00-205-6491
NSN 6620-01-333-4734
NSN 5965-00-170-5254