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 5895-01-598-8308
NSN 6220-01-319-1166
NSN 7035-01-144-3345
NSN 5950-01-168-3139
NSN 5999-01-398-1242
NSN 6620-00-724-3137
NSN 5935-01-176-5057
NSN 5930-01-234-7284
NSN 6320-00-225-7013
NSN 6145-01-254-2624
NSN 6220-01-449-4202
NSN 6110-00-917-3805