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Greenlee high-speed steel drill tap countersink bit 5/16-18 uncoated finish

Greenlee

Greenlee DTAP5/16-18 Drill/Tap/Countersink Bit 5/16-18

SKU CH-GGWJ-6J94K MPN DTAP5/16-18

Drills, taps and countersinks 5/16-18 UNC threads in one high-speed steel bit

  • Main materialHigh speed steel
  • Color and finishUncoated
  • Product typeAngle Drivers
  • Product weight0.1
  • Drills, taps and countersinks in one pass
  • High-speed steel withstands repeated cutting cycles
  • 5/16-18 UNC thread matches standard fastener sizes
  • 3 1/4 inch overall length reaches deeper holes
  • Weighs only 0.1 lb for reduced operator fatigue

Greenlee Drill/Tap/Countersink Bit 5/16-18 UNC

This Greenlee bit combines drilling, tapping and countersinking in a single pass. It is made from high speed steel with an uncoated finish. The tool handles a 5/16 inch minus 18 UNC thread size and measures 3 1/4 inches overall. It suits electricians and maintenance crews who need to prepare threaded holes quickly.

Ideal for repetitive UNC thread preparation in metal

The bit serves installers who regularly create 5/16-18 threads in sheet metal or plate. It is not suited for metric thread requirements or for materials that demand a coated cutting surface. Buyers who need a different thread pitch or a larger diameter should look at other options.

Thread specification 5/16 inch minus 18 UNC

The 5/16-18 UNC thread size is the single detail that decides fit. Match this specification exactly to the hole and fastener you are using. The high speed steel construction supports standard cutting speeds for this thread form.

How it compares

Measured against everything we stock in Power Drills, Drivers & Cutting Bits, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 94% of the 2,412 comparable items (median $81.99).

Specifications

Product
Brand nameGreenlee
Model nameDTAP5/16-18
Color and finishUncoated
Product typeAngle Drivers
Size & build
Main materialHigh speed steel

Questions about this item

What size drill chuck do I need for the 3 1/4 in. overall length shank?

The bit fits a standard drill chuck that accepts the shank diameter of this 3 1/4 in. overall length tool.

Can I use this 5/16-18 UNC bit with my existing tap wrench?

This is a power-driven drill/tap/countersink bit for rotary drills, not a hand-tap square shank for tap wrenches.

How do I verify the 5/16-18 threads are cut correctly after drilling?

Run a 5/16-18 UNC gauge or mating bolt into the hole; the threads should engage smoothly through the full depth.

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