PIPE PLUG C.S. HEX. Dorman's Pipe Plugs are manufactured with a high corrosion resistance for long-lasting performance. They're conveniently available in packs of varying quantities.Pipe Plug C.S. Hex M8-1.0, Head Size 4mm.Pipe, Plug, PlugsFeature - Benefit 1: Direct replacement for a proper fit every timeFeature - Benefit 2: Thread lock applied for increased locking action and leak prevention (where applicable)Feature - Benefit 3: Made of high quality steel, brass, or aluminumFeature - Benefit 4: Dorman's Pipe Plugs are designed and constructed to strict engineering quality standards.Dorman is one of the most versatile and innovative manufacturers in the automotive aftermarket as they provide the parts and equipment that you need