Century Drill Tool Co Inc 98303 Npt Hex Threading Die

Product Description

The CENTURY DRILL TOOL CO INC 98303 is a 3/8 inch x 18 National Pipe Taper (NPT) hexagon threading die designed for hand threading operations across a wide range of materials. Manufactured from carbon steel, the die measures 1-7/16 inches across the hex. It is intended for rethreading applications where high-accuracy tolerance is not critical, making it a practical choice for field repairs and maintenance work in plumbing and pneumatic systems. Licensed plumbers, pipefitters, and experienced maintenance technicians are the primary installers for this type of tooling.

This die is well suited for residential and light commercial plumbing lines, air supply lines, and general pipe threading work where NPT connections are required. The hexagonal profile allows it to be driven with a standard hex die stock for controlled threading, or used directly with a wrench or socket when working in confined spaces with limited clearance. It is a useful addition to a service technician's threading kit for rethreading existing pipe ends or cutting new threads on replacement pipe.

Key Features

• 3/8 inch x 18 TPI National Pipe Taper thread form for standard NPT fittings
• 1-7/16 inch hex body — compatible with standard hexagon die stocks
• Can be driven with a wrench or socket in tight or confined spaces
• Carbon steel construction for cutting threads in a variety of materials
• Suitable for plumbing and air line rethreading where tolerance precision is not critical
• Designed for hand threading work — no lathe or power threading machine required

Compatibility

Designed for use with standard hexagon die stocks that accept a 1-7/16 inch hex die. Suitable for hand threading NPT pipe connections in plumbing and compressed air applications.

Installation Notes

This die is intended for hand threading and should be used with the appropriate hexagon die stock or a suitable wrench or socket. Ensure the pipe or fitting end is clean, deburred, and properly supported before threading. Apply cutting oil to the die and workpiece to reduce friction and improve thread quality. Follow applicable plumbing and mechanical codes, such as the IPC or IFGC, when making pipe connections in regulated systems.