Elliptical locking feature id
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 5960-01-336-5459
NSN 5835-00-187-1481
NSN 5999-01-490-1779
NSN 5905-00-533-5324
NSN 5930-00-079-1304
NSN 5999-00-135-4116
NSN 6145-01-194-3086
NSN 6645-00-200-2322
NSN 5945-01-415-6049
NSN 6620-01-518-7803
NSN 6150-01-460-7916
NSN 5965-00-486-7907