AN4 AN6 AN8 AN10 AN12 Aluminum Male Flare Thread Hexagon Head Blanking Plugs Fitting Hex Cap Lock Hose Fitting Adapters Anodized Application: Fit For Fuel Rail, for Oil Cooler, for Fuel Pump, for Fuel Pressure Regulator, for Fuel Filter, for Radiator, etc. Compatible for Fluid, for Oil, for Lubricants, for Diesel, for Fuel, etc. Features： 1.Our product is made from high-performance lightweight aluminum alloy 6061-T6, ensuring quality and durability. The lightweight construction of our product makes it easy to handle and install, while its premium-grade materials ensure long-lasting performance. 2.Plug cap fitting anodized surface treatment, which increase sturdiness, corrosion resistance, durability, and have a long service life. This fitting is uitable for use with most fluids, and is easy to use to meet your needs. 3.Flare straight thread plug reusable. Designed with smooth flow, long lasting and easy assembly .Precision machined to ensure precise thread engagement, For Any Plumbing Situation. 4.Our aluminum alloy thread male head with hex socket, designed to enhance performance and increase reliability, particularly in the automotive industry. Our product undergoes precise machining to ensure accurate thread engagement, and rigorous quality inspections before leaving the factory to ensure long-lasting Material & Color: Color: Black,Blue Material：Aluminum alloy Package Included: 1Pc Fuel Fitting Cap Lock Adaptor