3/8in NPT Female Pipe Coupler Black

The 3/8in NPT Female Pipe Coupler Black from REDHORSE PERFORMANCE is an essential fluid-transfer component for custom automotive hydraulic and fuel system builds. Whether you're assembling a high-performance fuel system, upgrading brake lines, or installing custom coolant circulation, this female coupler serves as a reliable connection point between rigid and flexible lines.

This black-finished coupler features a 3/8-inch NPT female thread design that accepts matching male threads, making it compatible with standard automotive plumbing applications. The tapered NPT thread profile creates a mechanical seal without requiring additional sealant tape, though many professionals apply thread sealant as a best practice for pressure systems. REDHORSE PERFORMANCE's precision manufacturing ensures tight tolerances and a durable powder-coated black finish that resists corrosion.

Custom builders favor this fitting for fuel injection systems, turbo cooling circuits, and auxiliary coolant loops where reliable connections prevent costly leaks and system failures. The compact 0.083-pound weight and minimal footprint make this coupler ideal for space-constrained applications where every inch matters.