Profile: Fulford Mfg. Co. specializes in miniature automotive stampings and assemblies such as cup plugs, check ball valves, orifice plugs, freeze plugs & spring pins. Our automotive products and capabilities are suitable for OEM applications such as medical device components, hydraulic/pneumatic plugs & flow restrictors, electronic components, standard eyelets and grommets. Our cup plug is used to plug holes, which is a part of an items design requirement.