Irwin IR7407 Rethreading Hex Pipe Die 1 Inch Npt

Product Description

The IRWIN IR7407 is a hex-style rethreading pipe die designed to cut and restore 1-inch NPT (National Pipe Taper) threads at 11-1/2 threads per inch. Manufactured from high carbon steel (HCS), this die delivers the hardness needed to cut clean threads in iron and steel pipe. Plumbers, pipefitters, and mechanical contractors reach for this die when repairing damaged threads on existing pipe or cutting fresh threads on new stock. Its hex outer profile seats securely in a standard pipe die stock for controlled, repeatable thread cutting without slippage.

This die is suited for residential and commercial plumbing, gas piping, and general mechanical work where 1-inch NPT connections are required. Common applications include repairing corroded or damaged threads on black iron gas lines, galvanized water pipe, and threaded conduit fittings. It is sold as an individual die and is used by licensed plumbers and pipefitters in both service and new-installation settings.

Key Features

• 1-inch NPT thread form at 11-1/2 TPI for standard tapered pipe connections
• High carbon steel (HCS) construction for durability when threading iron and steel pipe
• Hex outer profile seats firmly in compatible pipe die stocks to prevent rotation
• Rethreading design allows restoration of damaged or corroded existing threads
• Sold individually — one die per unit

Compatibility

Designed for use with standard hex pipe die stocks that accept 1-inch NPT hex dies. Compatible with iron pipe, steel pipe, and similar ferrous pipe materials requiring 1-inch NPT tapered threads.

Installation Notes

Installation and use should be performed by a licensed plumber or pipefitter following applicable code requirements, including IFGC guidelines when working on gas lines. Shut off gas or water supply and depressurize the line fully before beginning any threading work. Use cutting oil generously to extend die life and produce cleaner threads. Inspect the die for chips or wear before each use and replace if thread form is compromised.

Technical Specifications

• Thread Standard: NPT (National Pipe Taper)
• Pipe Size: 1 inch
• Threads Per Inch (TPI): 11-1/2
• Die Style: Hex Die
• Material: High Carbon Steel (HCS)
• UPC: 042526074073
• Sold As: Each

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: IR7407