Irwin IR1903ZR Npt Pipe Tap 1/4 Inch

Product Description

The IRWIN IR1903ZR is a 1/4-inch NPT pipe tap designed for cutting internal tapered pipe threads in metal pipe fittings, couplings, and threaded ports. NPT (National Pipe Taper) threads form a pressure-seal joint as they are tightened, making this tap a standard tool for plumbing, HVAC, and industrial piping work. Plumbers, pipefitters, and HVAC technicians use this tap to create leak-resistant threaded connections in new installations and repair work. The tapered profile conforms to ANSI NPT thread standards, ensuring proper fit with standard NPT fittings and valves.

This tap is suited for threading 1/4-inch pipe ports in a range of materials encountered in residential and light commercial trade work, including ferrous and non-ferrous metals. Typical applications include adding or restoring threaded ports on valve bodies, manifolds, pipe caps, and fittings where NPT connections are required. It is a hand-tap-style tool intended for use with a standard tap wrench or adjustable tap holder.

Key Features

• 1/4-inch NPT tapered thread profile conforms to ANSI NPT standards
• Cuts internal tapered threads for pressure-seal pipe connections
• Compatible with standard tap wrenches and adjustable tap holders
• Suitable for use on ferrous and non-ferrous metals common in trade piping work
• Sold individually (each unit)

Compatibility

Designed for cutting standard 1/4-inch NPT internal threads in pipe fittings, valve bodies, manifolds, and threaded ports where ANSI NPT pipe thread standards apply.

Installation Notes

A licensed plumber, pipefitter, or qualified HVAC technician should perform pipe threading work in pressurized systems. Ensure the workpiece is securely clamped before tapping, and apply appropriate cutting fluid to extend tool life and improve thread quality. Follow all applicable codes, including IPC and IFGC, when threading pipe connections in gas or water systems. Inspect the finished threads before assembly to confirm full thread engagement and a proper seal.

Technical Specifications

• Thread Type: NPT (National Pipe Taper)
• Tap Size: 1/4 inch
• Unit of Measure: Each
• Minimum Order Quantity: 5
• UPC: 042526019036

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: IR1903ZR