Pjp 4mm shrouded plugs and sockets pjp 1065 bl this electro pjp 4mm shrouded cable plug is designed for use with 4mm shrouded sockets it has polypropylene insulation with brass and beryllium copper nickel contact plating both plugs and sockets are rated for 36a pjp 1065 bl 4mm shrouded cable plug blue