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Ridgid 37880 1 inch NPT four die set high speed steel

Ridgid

Ridgid 37880 1 in NPT 11 1/2 4 die trap

SKU CH-S7H1-0GQCP MPN 37880

Four high-speed steel dies cut 1 in NPT right-hand threads at 11 1/2 TPI for Ridgid 0, 00, 11, 12, 30 and 31 die heads

  • TypeDrain Components
  • Cuts clean NPT threads on 1 in pipe
  • Four high-speed steel dies resist wear
  • Works with Ridgid 0-R through 31A die heads
  • Fits both manual and power handheld threaders
  • Suitable for aluminum, galvanized and steel pipe

Threading die set for 1-inch NPT pipe

The Ridgid 37880 is a four-piece high-speed steel die set designed to cut right-hand National Pipe Taper threads on 1-inch pipe. It fits Ridgid handheld manual and power threaders using compatible die heads such as the 0-R, 00-R, 11-R, 12-R, 30A and 31A models. The dies are suitable for use on aluminium, galvanised steel and steel pipe materials.

For plumbers cutting new threads on 1-inch pipe

This set suits professionals and maintenance crews who need to create or repair 1-inch NPT threads on site or in the workshop. It is not for anyone working with metric pipe sizes, left-hand threads, or thread forms other than NPT. Buyers who require dies for larger or smaller diameters should look at other configurations.

11 1/2 threads per inch on 1-inch NPT

The defining specification is the 11 1/2 threads-per-inch pitch matched to the 1-inch nominal pipe size. This pitch determines compatibility with the mating fittings and the threader head. Verify that the required thread form and pipe diameter match these values before purchasing.

Highlights

  • Cuts clean NPT threads on 1 in pipe
  • Four high-speed steel dies resist wear
  • Works with Ridgid 0-R through 31A die heads
  • Fits both manual and power handheld threaders
  • Suitable for aluminum, galvanized and steel pipe

Specifications

TypeDrain Components
BrandRidgid
Model37880

Questions about this item

Does the 11 1/2 threads-per-inch NPT die generate noticeable heat during extended hand-threading sessions?

The high-speed steel dies cut cleanly with moderate pressure, so heat buildup stays low during typical handheld use.

Which die heads must I already own to mount these four dies?

They fit Ridgid 0-R, 00-R, 11-R, 12-R, 30A and 31A die heads used on handheld manual and power threaders.

Will the 1-inch NPT dies thread correctly into existing galvanized steel pipe that was cut with older Ridgid tooling?

Yes, the right-hand NPT 11 1/2 TPI standard matches legacy Ridgid threads on galvanized, steel and aluminum pipe.

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