MIL-S-3644B (NOTICE 2), MILITARY SPECIFICATION: SHAFT ASSEMBLY, FLEXIBLE (05-NOV-2008)
MIL-S-3644B (NOTICE 2), MILITARY SPECIFICATION: SHAFT ASSEMBLY, FLEXIBLE (05-NOV-2008)., MIL-S-3644B, dated 30 April 1996, remains inactive for new
design; however, the document is valid for use.