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The RIDGID 37400 is a 12-R hand threader die head designed to cut 1-inch nominal NPT right-hand threads on pipe. Built with alloy steel dies, this die head delivers consistent, clean threads suited for professional pipe fitting work. It is a replacement or additional die head for use with RIDGID 12-R manual pipe threaders. Plumbers and pipefitters use this die head when threading pipe on the job site or in a shop environment where a powered threading machine is not required or available.
This die head is intended for residential and commercial plumbing and piping applications where 1-inch NPT threaded connections are standard. It fits into the RIDGID 12-R manual pipe threader, allowing a single threader handle to accept different die head sizes for various pipe diameters. The right-hand thread configuration is standard for most NPT pipe connections in water supply, gas, and general piping systems.
Designed for use with RIDGID 12-R manual pipe threaders as stated by the manufacturer.
Installation and use of this die head should be performed by a licensed plumber or qualified pipefitter familiar with manual pipe threading equipment. Ensure the pipe is properly secured in a pipe vise before threading. Apply threading oil liberally to the pipe and dies during the threading operation to extend die life and produce clean threads. Inspect dies for wear or damage before each use and replace if threads appear torn or incomplete.
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