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Four silver steel dies in a row

VEVOR

VEVOR KT208 Threading Machine Dies 1/2-3/4 NPT 4 Pack HSS

SKU CH-NCF4-EB30W

Four HSS pipe threading dies cut NPT 1/2 to 3/4-inch threads for RIDGID universal die heads and split-type machines

  • TypeOther Appliances
  • Width3.94
  • Precise NPT threads from 1/2 to 3/4 inch for leak-free joints
  • High-speed steel construction resists wear and heat during heavy use
  • Four dies per pack cover the full size range in one set
  • Compatible with RIDGID universal heads 504A, 711, 713, 811A, 815A, 816, 817, 842
  • Sharp, evenly spaced cutters produce clean threads without metal shavings

Threading Dies for NPT 1/2-3/4 Inch

This four-piece set of high-speed steel dies cuts National Pipe Taper threads from 1/2 to 3/4 inch. They are built for professional plumbers and maintenance crews who need reliable threading on job sites or in workshops. The dies fit split-type machines and RIDGID universal die heads including models 504A, 711, 713, 811A, 815A, 816, 817 and 842. Buyers who need metric or larger NPT sizes should look elsewhere.

HSS Construction and Machine Fit

Each die is made from high-speed steel chosen for hardness, toughness, wear resistance and heat tolerance. Sharp, evenly spaced cutters produce clean threads without metal shavings, helping to create leak-free joints. The dies mount directly into compatible RIDGID universal die heads and split-type machines, so no extra adapters are required for the listed models. The package contains only the four dies; no handles or drive tools are included.

Heat Tolerance and Cutting Behaviour

High-speed steel resists softening during extended cutting, keeping the dies stable in high-demand environments. This reduces the frequency of die changes and keeps downtime low. The cutting geometry is designed to clear chips cleanly, which helps maintain thread accuracy and surface finish. No lubrication system or cooling requirement is specified by the manufacturer.

Highlights

  • Precise NPT threads from 1/2 to 3/4 inch for leak-free joints
  • High-speed steel construction resists wear and heat during heavy use
  • Four dies per pack cover the full size range in one set
  • Compatible with RIDGID universal heads 504A, 711, 713, 811A, 815A, 816, 817, 842
  • Sharp, evenly spaced cutters produce clean threads without metal shavings

Specifications

TypeOther Appliances
Width3.94

Questions about this item

What NPT thread standard do these dies cut, and what size range do they cover?

They cut 1/2 inch to 3/4 inch NPT threads with sharp, evenly spaced cutters for leak-free connections

Which die heads and machines accept the KT208 dies?

They fit RIDGID universal die heads 504A, 711, 713, 811A, 815A, 816, 817, 842 and split-type machines

How are the dies installed, and what step is often missed?

Insert each die into the universal die head slots, align the right-handed cutter orientation, then secure the locking pins before threading

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