Military Standard (MS)

This standard was developed by the military, and has found its way into all aspects of aviation. The MS/MIL standard has replaced the AN system and in many cases, former AN parts are now being produced as MS or MIL parts. The suffix usually consists of a letter, which identifies the item (R for rivet, S for steel, C for cable, etc.), and a serial number. These standards apply both to hardware and materials. For example, MIL-C-5424 is a standard 7 x 19 aircraft cable, made of carbon steel.