Ridgid 37870 378 Series NPT Hi...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$91.62
Ridgid 37870 378 Series NPT High Speed Pipe Threading Dies

Ridgid 37870 378 Series NPT High Speed Pipe Threading Dies

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Model: RID37870

In Stock (leaves warehouse same day if ordered before 3pm ET)

$91.62
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Ridgid 37870 378 Series NPT High Speed Pipe Threading Dies

The Ridgid 37870 is a set of 1/2" NPT (National Pipe Thread) high speed dies from the Ridgid 378 Series, engineered for cutting clean, accurate National Pipe Thread profiles on compatible Ridgid die head threading equipment. The 378 Series die lineup spans multiple pipe sizes across models 37870, 37880, and 37895, giving plumbers, pipefitters, and contractors a consistent, purpose-built solution for producing code-compliant threaded joints across a range of NPT pipe sizes. This listing covers the 37870 model, sized for 1/2" NPT threading applications. Manufactured from high speed steel and built for professional use, these dies are backed by Ridgid's Full Lifetime Warranty and manufactured in the United States, reflecting the durability and precision that trade professionals expect from Ridgid tooling.

Key Features

  • Trade Size: Sized for 1/2" NPT pipe threading applications, delivering the correct thread profile for standard National Pipe Thread connections.
  • Thread Standard: Configured for NPT (National Pipe Thread) threading, ensuring compatible, leak-resistant threaded joints on compatible Ridgid die head equipment.
  • High Speed Steel Construction: Manufactured from high speed steel for extended cutting life and consistent thread quality across repeated use in demanding field and shop conditions.
  • 378 Series Family: Part of the Ridgid 378 Series die lineup, which spans models 37870, 37880, and 37895 for different NPT trade sizes, designed to work with corresponding Ridgid threading equipment for reliable, repeatable results.
  • Model Number: Identified as model 37870, NPT (National Pipe Thread), for straightforward identification and reordering.
  • Full Lifetime Warranty: Backed by Ridgid's Full Lifetime Warranty, giving professionals confidence in long-term performance and product support.
  • Country of Manufacture: Manufactured in the United States to Ridgid's quality standards.

Technical Specifications

  • Model Number: 37870 (NPT, National Pipe Thread)
  • Series: 378 Series (available across models 37870, 37880, 37895)
  • Trade Size: 1/2" NPT
  • Material: High Speed Steel
  • Product Warranty: Full Lifetime Warranty
  • Country of Origin: United States

Typical Applications

  • Plumbing Pipe Threading
  • Pipefitting and Mechanical Piping Installations
  • Commercial and Residential Plumbing Systems
  • Maintenance and Repair of Threaded Pipe Connections
  • Professional Trade and Contractor Job Sites

Why Ridgid?

Ridgid has built its reputation on rugged, precision-manufactured tooling that professional plumbers and pipefitters can rely on day after day. The 37870 high speed die continues that standard as part of the broader 378 Series lineup, offering 1/2" NPT thread-cutting accuracy backed by a Full Lifetime Warranty and United States manufacturing. For trade professionals who need dependable, code-compliant threading results across a range of NPT pipe sizes, Ridgid's 378 Series dies deliver the consistency and durability the brand is known for.

Manufacturer Resources

Product Specs

Model Number:
(NPT) National Pipe
Product Warranty:
Full Lifetime Warranty
Country Of Origin:
United States
list_batch:
RID-20260924
Product Type:
Pipe Threading Die
Standards:
NPT
Series:
378 Series
Department:
Electrical
Product Subgroup:
Conduit Tools
Product Material:
High Speed Steel
Warranty Length:
Lifetime
Product Group:
Electrical Installation Tools

Ridgid RID37870 – Frequently Asked Questions

1) What pipe sizes do the Ridgid 378 Series NPT high speed dies cover?
Three trade sizes are offered in the 378 Series NPT high speed dies: 1/2 inch NPT (model 37870), 1 inch NPT (model 37880), and 2 inch NPT (model 37895). Each set cuts only its own size, so order by the trade size of the pipe you are threading.
2) Are these Ridgid 378 Series dies NPT or BSPT thread?
NPT, National Pipe Thread. The 378 Series high speed dies are configured for the NPT standard, which is the tapered thread used on standard US plumbing and mechanical piping. If your job calls for BSPT or any other thread form, these are the wrong dies.
3) What are Ridgid 378 Series dies made of, and does that matter for cast iron or stainless?
High speed steel. That gives longer cutting life and more consistent thread form on repeated production threading than carbon steel dies, which is why they hold up in shop and field work. The material is the reason they stay sharp through volume threading of standard pipe.
4) Do I need a separate set of 378 dies for every pipe size I thread?
Yes. Pipe dies are size specific, so a plumber threading 1/2, 1, and 2 inch pipe needs all three sets: 37870 for 1/2 inch, 37880 for 1 inch, and 37895 for 2 inch. There is no adjustable single set covering the range.
5) Where are Ridgid 378 Series pipe threading dies made?
United States. For public agency, school district, or federal MRO buyers working to domestic sourcing requirements, the 378 Series dies are US manufactured.
How fast can I get the Ridgid RID37870 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Ridgid RID37870 come with a warranty?
Absolutely. The Ridgid RID37870 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Ridgid RID37870?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Ridgid RID37870 from ZenSupply?
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