Ridgid 37390 12-R Die Head 1/2 Inch Npt Manual Pipe Threader

Product Description

The RIDGID 37390 is a 12-R hand threader die head designed for cutting 1/2 inch nominal NPT threads on pipe. The die head produces right-hand threads using alloy steel dies, delivering the thread form and durability required in professional plumbing and pipefitting work. This die head mounts to the RIDGID 12-R manual pipe threader, making it a direct field replacement or additional-size head for technicians who thread pipe by hand. Alloy steel construction holds cutting edge integrity across repeated use on steel pipe.

This die head is used in plumbing rough-in, mechanical piping, and gas line work where 1/2 inch NPT threaded connections are required. It is suited for residential and light commercial applications. Plumbers and pipefitters use 12-R manual threaders in tight spaces or in the field where power threading equipment is not practical. The 37390 die head allows a technician to swap sizes on the same 12-R handle rather than carrying multiple tools.

Key Features

• Cuts 1/2 inch nominal NPT right-hand threads
• Alloy steel dies for extended cutting edge life
• Direct-fit head for the RIDGID 12-R manual pipe threader
• NPT thread form meets standard tapered pipe thread requirements for pressure fittings
• Swappable die head design allows one 12-R handle to serve multiple pipe sizes

Compatibility

Designed for use with RIDGID 12-R manual pipe threaders. The 37390 die head is specific to the 12-R platform and is not interchangeable with power drive or ratchet threader heads.

Installation Notes

Installation and use of this die head should be performed by a licensed plumber or qualified pipefitter. Before threading, ensure the pipe is properly reamed and deburred to protect die life and thread quality. Apply thread cutting oil liberally during the threading operation to reduce heat and extend die life. Follow applicable code requirements, including IPC and IFGC, for thread engagement length and joint compound use on pressure systems.

Technical Specifications

• Thread Size: 1/2 inch nominal
• Thread Type: NPT
• Thread Direction: Right-hand
• Die Material: Alloy Steel
• Compatible Tool: RIDGID 12-R Manual Pipe Threader

Standard Information

• Brand: RIDGID
• Manufacturer Part Number: 37390