NPT Tap 1/8-27

The NPT Tap 1/8-27 is a precision threading tool engineered for machinists, plumbers, and maintenance technicians who need to cut or repair National Pipe Tapered (NPT) threads on pipe fittings and hydraulic components. This right-hand tap is essential for creating new threaded holes or restoring damaged threads in 1/8-inch NPT applications, commonly found in pneumatic systems, fuel lines, and fluid transfer assemblies. Whether you're a professional shop setting up production tooling or a field technician performing emergency repairs, this tap delivers consistent, code-compliant thread geometry.

NPT taps feature a 1-inch-per-16-threads taper that creates a pressure-tight seal without requiring sealant tape on most connections, a critical advantage in hydraulic and pneumatic applications. The right-hand rotation cuts threads in the conventional direction, compatible with standard tap wrenches and powered threading equipment. At 0.08 pounds and compact dimensions (4.05 x 0.45 x 7.1 inches), this tool is easy to transport and store in mobile service trucks or workshop tool carts. The tapered profile gradually widens the hole as you advance, reducing cutting resistance and producing cleaner thread flanks with minimal chatter.

This NPT Tap 1/8-27 is indispensable for anyone maintaining or assembling equipment that uses NPT threaded ports—including compressors, air dryers, manifold blocks, and water systems. Use it after drilling a correctly-sized pilot hole (typically #27 for 1/8" NPT) and follow a steady cutting speed with appropriate cutting fluid to maximize tool life. Ideal for both new installations and field repairs where thread restoration is faster and more cost-effective than component replacement, this tap meets ANSI/ASME standards for pressure-tight tapered pipe threads.