Engineered Source has supplied this custom socket cap screw for many years on a blanket order basis - the cad plated screw measures 2/56 X 3/8 and is manufactured in the United States using 18-8 stainless steel material. Secondary service of cadmium plating with NADCAP certification is applied to finalize the cap screws for their end use. Internal part number for this socket cap screw is SC-002006-ID.