A headless fastener externally threaded on both ends with each threaded portion of one but not necessarily the same nominal diameter. It is designed to be locked in place by either a ring, lock, serrated or a ring, lock, keyed.
NSN 4140-00-952-2287
NSN 5935-01-616-0462
NSN 5998-01-222-0641
NSN 6105-01-381-2012
NSN 6135-01-319-0623
NSN 5905-00-480-0013
NSN 6130-00-615-5727
NSN 5835-01-291-5405
NSN 6145-00-959-5897
NSN 6240-01-099-8826
NSN 6105-01-605-1972
NSN 5910-01-219-8063