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Silver metal threading die with knurled edges and adjustment slot

Drill America

Drill America DWTSR1-3830 3/8"-30 HSS Round Adjustable Die

SKU CH-K3CH-2G57V

Cuts 3/8"-30 threads in pipe and tubing using adjustable high-speed steel for extended wear life

  • High-speed steel construction extends die wear life
  • Adjustable fine-pitch screw enables precise thread fit
  • Dual chamfers allow threading near shoulders
  • 3/8"-30 thread size matches standard plumbing specs
  • California Proposition 65 warning applies to this product

Threading Die for 3/8"-30 Threads

This High Speed Steel round adjustable die cuts 3/8"-30 threads on pipe and tubing. It is designed for plumbing and automotive maintenance where precise thread restoration or creation is required. The die suits professional mechanics and DIY users performing repair work on fluid systems.

Replaces Worn or Fixed Dies

The adjustable design replaces solid dies that cannot compensate for wear, allowing the cutting diameter to be opened or closed via a fine-pitch screw. This extends service life and lets the user match fit requirements without buying multiple tools. The jump is worthwhile when thread tolerance varies between jobs or when threading near shoulders demands a shallower chamfer.

Handles Standard Thread Cutting and Shoulder Work

One face offers a 2 to 3 thread chamfer for general threading while the opposite face provides a 1 to 1-1/2 thread chamfer for work close to shoulders. The HSS construction resists wear during repeated use on steel and iron pipe. It runs out when thread specifications fall outside the 3/8"-30 size or when material hardness exceeds the capability of high speed steel.

Highlights

  • High-speed steel construction extends die wear life
  • Adjustable fine-pitch screw enables precise thread fit
  • Dual chamfers allow threading near shoulders
  • 3/8"-30 thread size matches standard plumbing specs
  • California Proposition 65 warning applies to this product

Specifications

BrandDRILL AMERICA

Questions about this item

What size die stock or holder fits the 1" outside diameter of this die?

The die has a 1" outer diameter, so it fits standard 1" die stocks and machine holders designed for that size.

How do you adjust the thread fit using the fine-pitch screw, and what is the common mistake?

Turn the fine-pitch screw to open or close the die; the common mistake is forcing the screw instead of letting the die halves spring together gradually.

When should the die be replaced due to wear on the high-speed steel threads?

Replace the die when the 2 to 3 thread chamfer shows visible rounding or when threads cut become undersized and loose in a 3/8"-30 gauge.

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