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 7035-00-215-3272
NSN 6645-01-200-5289
NSN 5905-00-071-6553
NSN 6620-01-598-2271
NSN 6620-01-560-2447
NSN 5855-01-103-8650
NSN 5945-01-520-6157
NSN 5985-01-082-3173
NSN 5895-01-537-7075
NSN 5905-01-240-5943
NSN 7035-00-803-3056
NSN 6620-01-201-4176