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About this item

• Size and Sealing: The thread size of 4an is 7/16-20 UNF，6an is 9/16-18 UNF,8an is 3/4-16 UNF,10an is 7/8-14 UNF, all sealed by a 37 degree flare.
• Parameter: Max Working Pressure: 1500 PSI. Working Temperature Range: -65º F to 252º F.
• Material: Made of aluminum alloy 6061-T6, anodized black surface.
• Function: The fitting caps block off fuel hose line, prevent dirt and debris from entering fittings and adapters.
• Application: Widely used in returnless fuel system, fuel cell tank, fuel line, valve cover, etc.