We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Ridgid 37915 1/2 in NPT pipe thread die set, four high-speed steel dies in silver finish

Ridgid

Ridgid 37915 1/2 in NPT Pipe Thread Die 4 Pc

SKU CH-620K-VRNV1 MPN 37915

A four-piece high-speed steel die set cuts 1/2 in NPT right-hand threads in stainless steel pipe

  • TypeDrain Components
  • Threads 14 TPI for tight NPT seals
  • High-speed steel dies cut stainless pipe cleanly
  • Four-piece set covers full 1/2 in threading job
  • Fits Ridgid 0-R, 00-R, 11-R, 12-R, 30A, 31A die heads
  • Right-hand thread direction matches standard pipe fittings

Professional plumbing threading

The Ridgid 37915 is a four-piece NPT pipe thread die set built for 1/2 inch stainless steel pipe. It fits Ridgid handheld manual and power threaders using compatible die heads such as 0-R, 00-R, 11-R, 12-R, 30A and 31A. The set targets professional plumbers and maintenance crews who need reliable right-hand threads on stainless pipe.

Sustained threading performance

High-speed steel dies maintain cutting geometry through repeated passes on stainless steel without rapid edge degradation. The 14 threads-per-inch pitch matches standard NPT taper for consistent engagement across long pipe runs. Four dies distribute wear evenly when the threader is used continuously on job-site installations.

Thermal and power behaviour

Manual operation generates negligible heat at the die face while power threaders run cool under normal feed rates. No external lubrication system is required beyond standard cutting oil applied by the operator. Power draw depends entirely on the threader motor used with the compatible die heads listed.

Highlights

  • Threads 14 TPI for tight NPT seals
  • High-speed steel dies cut stainless pipe cleanly
  • Four-piece set covers full 1/2 in threading job
  • Fits Ridgid 0-R, 00-R, 11-R, 12-R, 30A, 31A die heads
  • Right-hand thread direction matches standard pipe fittings

Specifications

TypeDrain Components
BrandRidgid
Model37915

Questions about this item

Does the 1/2 in NPT die head run hot or draw extra power when used continuously with a power threader?

The die head is a passive cutting tool with no motor or electronics, so it generates only normal friction heat and draws no power of its own.

Which threader or die head must I already own to use these four high-speed steel dies?

The dies fit Ridgid handheld manual or power threaders using die heads 0-R, 00-R, 11-R, 12-R, 30A or 31A.

Will the 14 threads-per-inch NPT dies cut correctly on my older Ridgid 00-R die head?

Yes, the 00-R is listed as a compatible die head, so the four right-hand NPT dies will engage properly.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.