Ridgid 37875 High Speed NPT Pipe Dies, 12-R Die Head Series

Ridgid 37875 High Speed NPT Pipe Dies, 12-R Die Head Series

The Ridgid 378 Series High Speed NPT Pipe Dies are precision-engineered replacement dies built for use with Ridgid Model 12-R die heads on Manual Ratchet Threaders or the Ridgid 700 Power Drive. This family of dies is offered across multiple models — 37875, 37885, and 37890 — to match different pipe diameters, with the 37875 sized for 1-1/4" diameter metal pipe. Each model in the series creates consistently uniform National Pipe Thread (NPT) profiles, delivering the clean, code-compliant thread that professional plumbers and pipefitters depend on. Backed by Ridgid's heavy-duty manufacturing standards, these dies are engineered to hold up to repeated use in demanding job-site and shop threading applications.

Key Features

• Model Range: Available as 37875, 37885, or 37890, with the 37875 precision-matched for 1-1/4" diameter metal pipe for accurate NPT thread cutting.
• Die Head Compatibility: Designed specifically for use with Ridgid Model 12-R die heads, compatible with Manual Ratchet Threaders and the Ridgid 700 Power Drive.
• Thread Type: Produces consistently uniform National Pipe Thread (NPT) profiles for reliable, leak-resistant pipe connections.
• Dependable Construction: Heavy-duty build engineered to withstand repeated threading cycles in professional and industrial settings.
• Precision Machining: Precisely machined for optimal threading performance and consistent thread quality on every pass.
• Series: Part of the Ridgid 378 Series of high speed NPT dies, matched to the 12-R die head system.

Technical Specifications

• Thread Type: National Pipe Thread (NPT)
• Product Warranty: Full Lifetime Warranty
• Country of Origin: United States

Typical Applications

• Threading Metal Pipe for Plumbing and Mechanical Systems
• Commercial and Industrial Pipefitting
• Use with Manual Ratchet Threaders
• Use with the Ridgid 700 Power Drive Threading Machine
• Replacement or Spare Dies for Existing 12-R Die Head Sets

Why Ridgid?

Ridgid pipe threading dies are built with dependable, heavy-duty construction and precision machining to deliver optimal threading performance on every job. The 378 Series High Speed NPT Dies, including the 37875 for 1-1/4" pipe, are backed by a Full Lifetime Warranty and manufactured in the United States, giving professional plumbers and pipefitters confidence in consistent, code-compliant NPT threads and long-term reliability from their Ridgid 12-R die head system.