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
Round adjustable die in brushed metal finish

Drill America

Drill America DWTSR112-51620 5/16"-20 HSS Round Adjustable Die

SKU CH-Q3FS-KCCYC

A 5/16"-20 HSS round adjustable die cuts external threads with improved wear life

  • Cuts precise 5/16"-20 threads with HSS durability
  • Adjustable fine-pitch screw gives exact thread fit
  • Dual chamfers start threads cleanly and reach shoulders
  • Round die design suits machine or hand holders
  • High-speed steel resists wear for longer tool life

Threading Tool for 5/16"-20 Threads

This high-speed steel round adjustable die cuts 5/16"-20 threads on pipes or rods. It is designed for threading operations where improved wear life is required. The die features chamfered faces for different starting conditions. It suits professional plumbers and maintenance technicians.

Suits Adjustable Die Holders

The die works with machine holders that have adjusting screws; the beveled slot allows the holder screws to control fit after the die screw is removed. Buyers who need a fixed-size die or a different thread pitch should look at other options. It is not intended for non-threaded pipe joining.

HSS Construction Handles Sustained Cutting

High-speed steel resists heat buildup during extended threading passes better than carbon steel alternatives. The adjustable screw lets the operator compensate for wear by opening the die slightly. Chamfer choices help maintain thread quality when cutting close to shoulders over long runs.

Highlights

  • Cuts precise 5/16"-20 threads with HSS durability
  • Adjustable fine-pitch screw gives exact thread fit
  • Dual chamfers start threads cleanly and reach shoulders
  • Round die design suits machine or hand holders
  • High-speed steel resists wear for longer tool life

Specifications

BrandDRILL AMERICA

Questions about this item

What size die stock or handle fits the 1-1/2" outside diameter of this round die?

A die stock or machine holder designed for 1-1/2" OD round dies accepts this tool; the beveled adjusting slot allows the holder's screws to control thread fit once the die's own screw is removed.

Can the 5/16"-20 threads cut by this HSS die mate correctly with existing UNF fasteners of the same pitch?

Yes, the 5/16"-20 thread form follows the Unified National Fine standard, so new external threads will engage properly with matching UNF nuts or tapped holes already in the assembly.

How can I verify the die is producing threads within tolerance after setup?

Check a test thread with a 5/16"-20 UNF thread plug gauge; the GO member should enter fully and the NO-GO member should not exceed three turns, confirming pitch diameter is in spec.

Also in this aisle

People compared these

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