The 5406C06 Female Pipe Thread Hydraulic Pipe Cap is a heavy-duty 3/8" FNPT cap designed to securely seal male pipe thread fittings in high-pressure hydraulic systems. Constructed from durable carbon steel and rated up to 6,000 PSI, it provides dependable sealing performance in demanding equipment and fluid power applications. The hex exterior allows easy installation with standard tools, making it simple to cap off lines, ports, or fittings when a secure seal is required—because a properly capped fitting keeps hydraulic fluid where it belongs and prevents contamination from sneaking in.
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