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Hexagonal carbon steel re-threading die, bright uncoated finish, 9/16 inch 20 threads

Drill America

Drill America 9/16 In.-20 Carbon Steel Hex Re-Threading Die

SKU CH-KNBX-F2CAF

A carbon steel hex die for rethreading or cleaning 9/16‑20 right‑hand threads on metal or plastic

  • Product typeDrill Bits
  • Restores damaged threads quickly with 9/16"-20 carbon steel die
  • Hex shape allows wrench use without a special holder
  • Re-threads metal and softer materials such as plastic
  • Bright uncoated finish resists corrosion during shop or field maintenance
  • Standard right-hand cut matches common USS thread specifications

Thread repair for 9/16-20 fasteners

This carbon-steel hex die restores damaged or rusted 9/16 in.-20 USS threads on metal and softer materials such as plastic. The bright uncoated finish and standard right-hand cut suit general shop and field maintenance. No special holder is required, so the die can be turned with a common wrench or socket. It is sold as an individual tool, not a set.

Mechanics restoring existing threads

Technicians who need to clean bruised threads on bolts, studs or tapped holes will find the hex shape convenient for hand-driven repair. The die is not intended for cutting brand-new threads in untapped material, nor for high-volume production threading. Users requiring left-hand threads, metric pitches or coated cutting surfaces should select a different tool.

Single-size 9/16-20 capacity

The die handles one specific thread size: 9/16 in. diameter with 20 threads per inch. It comfortably re-threads carbon steel, alloy steel and plastics in maintenance quantities. Hardened tool steels or deep blind holes may exceed its practical cutting ability. The 90-day return window applies if the tool proves unsuitable for the intended repair.

How it compares

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

Price $24.99
Cheaper than about 55% of the 5,493 comparable items (median $27.99).

Specifications

Product
Product typeDrill Bits

Questions about this item

What size wrench or socket fits the hex body of this 9/16 in.-20 re-threading die?

The die has a hex-shaped body, so a standard 9/16 in. wrench or socket will engage it directly without a special holder.

Can this carbon steel die clean threads on older plastic fittings without damaging them?

Yes, the uncoated carbon steel die is designed to rethread both metal and softer materials such as plastic.

How do I confirm the die is cutting correctly after I start it on a damaged bolt?

The standard right-hand cut should produce clean, uniform threads matching the 9/16 in.-20 pitch as you turn the die onto the bolt.

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