Home News & Events New Marking Standards for Military (MS) Parts

New Marking Standards for Military (MS) Parts

Due to abuses by offshore and U.S. based gray market counterfeiters, the U.S. government has imposed a new marking standard for MS part numbers. Legitimate franchised and approved sources are now marking MIL-STD-5015 connectors with a J prefix. The MS prefix was never copyrighted and was being duplicated by unscrupulous counterfeiters. The U.S. government has now protected the JMS call out – just as they had previously done for the older JAN call out. So if you order, for example, an MS3106F10SL-3P connector, the connector itself will come marked JMS3106F10SL-3P signifying that it is an authentic mil-spec part.

If your supplier is shipping you old MS nomenclature parts, beware of your source of supply. Approved military marking should now include the J or JAN prefix.