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 6240-01-160-8975
NSN 6610-00-060-0871
NSN 2925-01-472-4423
NSN 5905-00-829-9757
NSN 6130-00-935-5589
NSN 5935-01-505-6697
NSN 4140-01-358-7889
NSN 6645-00-536-1524
NSN 5950-00-577-0678
NSN 4140-01-419-8592
NSN 6135-01-285-1925
NSN 6220-01-533-6553