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Four stainless steel pipe threading dies in a set

Ridgid

Ridgid 37935 Pipe Thread Die 1 1/2 in Stainless Steel 4 Pc

SKU CH-FRCV-NNXT3

Cuts 1 1/2 inch NPT threads in stainless steel using four high-speed steel dies compatible with Ridgid handheld threaders

  • Designed for stainless steel pipe threading
  • NPT right-hand threads at 11 1/2 threads per inch
  • Four-piece high-speed steel die set
  • Compatible with Ridgid handheld manual and power threaders
  • Fits Ridgid die heads 0-R, 00-R, 11-R, 12-R, 30A, 31A

Pipe Thread Die for Stainless Steel

The Ridgid 37935 set provides four high-speed steel dies for cutting right-hand NPT threads on 1 1/2 inch stainless steel pipe. It fits Ridgid handheld manual and power threaders using compatible die heads. Professional plumbers and pipefitters use it for new installations or repair work on stainless systems.

Durable High-Speed Steel Construction

Each die is made from high-speed steel to resist wear when threading tough stainless steel material. The four-piece configuration distributes cutting load across multiple threads for cleaner results. Handheld operation keeps the process portable for job-site use without stationary equipment.

11 1/2 Threads Per Inch NPT Standard

The dies cut 11 1/2 threads per inch to the NPT taper standard required for pressure-tight pipe joints. This pitch matches the 1 1/2 inch nominal pipe size so buyers must confirm their thread specification before purchasing.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $80.99
Pricier than about 79% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameRIDGID

Questions about this item

How do I install these dies into a Ridgid 00-R die head, and what step is often missed?

Place the four dies into the 00-R die head slots matching the stamped numbers, then tighten the set screws evenly so the 11 1/2 TPI cutting edges align; the step often missed is confirming the right-hand thread direction before first cut.

What maintenance will the high-speed steel dies need after threading stainless steel pipe?

Clean chips from the 11 1/2 TPI flutes after each job, apply light machine oil to prevent galling, and inspect cutting edges for rounding; replace the four-piece set when threads show tear-out on 1 1/2 in NPT pipe.

What limit appears first when cutting continuous 1 1/2 in stainless pipe with a handheld power threader?

Heat buildup in the high-speed steel dies reduces edge life fastest; the 11 1/2 TPI pitch demands high torque, so pause between joints to let the four dies cool and avoid premature wear.

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