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 6135-01-222-0703
NSN 6145-01-261-5150
NSN 7035-01-327-6130
NSN 5835-00-757-3558
NSN 5910-01-321-7170
NSN 4140-01-431-9065
NSN 5930-01-061-9246
NSN 2925-01-607-7754
NSN 5835-01-200-7153
NSN 6685-01-414-3238
NSN 6610-01-536-1252
NSN 6610-01-552-7958