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Set of stainless steel NPT threading dies in a metal case

Wheeler-Rex

Wheeler-Rex 847790 NPT Dies UDH Stainless Steel 1 to 2 in

SKU CH-EWDB-4VZ3V

Stainless-steel NPT threading dies for 1 to 2 in pipe, compatible with multiple die heads including 504A, 711, 713, 811A, 815A, 816, 817, 842, 97065 and 897065

  • Product typeHydraulic Tool Accessories
  • Thread NPT pipe from 1 in to 2 in with stainless-steel dies
  • Universal die head fits Grainger 4CW40 4Z974 5A195 and mfr 504A 711 713 811A 815A 816 817 842 97065 897065
  • Hydraulic tool accessory built for threading machine operation
  • Stainless-steel construction resists corrosion on pipe applications
  • Wheeler-Rex 847790 model supplied new for professional use

1 to 2 in Stainless Steel NPT Dies

Wheeler-Rex 847790 NPT dies are universal threading accessories designed for stainless steel pipe from 1 in to 2 in. They fit compatible threading machines and serve plumbers and pipe fitters who cut taper threads on corrosion-resistant piping systems. The dies are built for use with hydraulic tool setups in professional trade environments.

Replaces worn dies on compatible heads

These dies replace worn or damaged threading dies on heads such as 504A, 711, 713, 811A, 815A, 816, 817, 842, 97065 and 897065. The upgrade is worth it when existing dies no longer produce clean threads on stainless steel or when a job requires the 1 in to 2 in capacity range. Matching the correct head part number ensures proper fit and thread quality.

Suits trades cutting stainless threads

This set suits professionals cutting NPT threads on stainless steel pipe within the 1 in to 2 in range using supported threading machines. It is not for buyers who need dies for other materials, different pipe sizes, or thread standards not listed. It also does not suit users whose threader heads are not among the compatible part numbers.

How it compares

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

Price $189.99
Pricier than about 90% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameWHEELER-REX
Product typeHydraulic Tool Accessories

Questions about this item

Which die heads accept the 1-to-2-inch stainless-steel NPT dies?

They fit Grainger part numbers 40, 195, 504, 711, 713, 811, 815, 816, 817, 842, 974, 97065 and 897065, matching manufacturer heads 504A, 711, 713, 811A, 815A, 816, 817, 842 and 97065.

How do you seat the dies in a universal die head so they cut straight threads?

Insert each die segment into its matching slot, align the size marks with the head index line, then tighten the set screws evenly; skipping the index alignment is the step that causes tapered or oversize threads.

When should the dies be replaced or re-sharpened during stainless-steel pipe threading?

Replace or sharpen when thread crests show rounding, root tearing appears, or cutting torque rises sharply; stainless steel work-hardens quickly, so inspect after every few joints and rotate die sets to spread wear.

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