Reiff Nestor 46176 Pipe Tap 3/8-18 Npt Hss Nitride

Product Description

The REIFF NESTOR 46176 is a standard NPT pipe tap designed to cut 3/8-18 tapered pipe threads in metal workpieces. Built from high speed steel with a nitride finish, this tap delivers consistent thread quality and extended tool life in demanding shop and field applications. The 4-flute design provides balanced cutting action and efficient chip evacuation. A low hook angle and regular chamfer make it well-suited for tapping through-holes in a range of ferrous materials. Thread length measures 1-1/16 inches, and the shank diameter is 0.700 inches. Licensed plumbers, pipefitters, HVAC technicians, and maintenance mechanics routinely use this tap when fabricating or repairing threaded pipe connections.

This tap is intended for cutting NPT (National Pipe Taper) threads in applications where a pressure-tight, tapered pipe thread is required. Typical uses include creating threaded ports in manifolds, fittings, valve bodies, and pipe nipples. It is suited for use in both shop bench work and in-field pipe repair scenarios common to plumbing, HVAC, and general mechanical service work. The regular chamfer style works best in through-hole applications where the tap can run fully through the material.

Key Features

• 3/8-18 NPT thread form for standard tapered pipe thread applications
• High speed steel construction for durability across ferrous and softer metal workpieces
• Nitride finish improves surface hardness and reduces friction during cutting
• 4-flute design promotes chip clearance and stable cutting geometry
• Regular chamfer for through-hole pipe thread cutting
• 1-1/16 inch thread length with a 0.700 inch shank diameter for compatibility with standard tap handles and chucks

Compatibility

Designed for use with standard tap handles and machine chucks sized for a 0.700 inch shank diameter. Cuts 3/8-18 NPT tapered pipe threads per standard pipe thread specifications.

Installation Notes

This tap is installed by licensed plumbers, pipefitters, HVAC technicians, or qualified mechanics using a tap handle or tapping fixture aligned perpendicular to the workpiece. Always use cutting fluid appropriate for the base material to reduce heat buildup and extend tap life. Back off the tap periodically during use to break and clear chips, particularly in deeper holes. Ensure the workpiece is securely clamped before beginning to tap.