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Greenlee steel drill/tap bit 1/4-20 UNC 20 threads per inch

Greenlee

Greenlee DTAP1/4-20 Drill/Tap Bit 1/4-20 UNC

SKU CH-YFDK-JDNH7

Drills, taps and countersinks 1/4-20 UNC threads in one pass using high-speed steel

  • Product typeDies & Taps
  • Main materialSteel
  • Drills, taps and countersinks in one step
  • High-speed steel construction for durability
  • 1/4-20 UNC thread size for standard applications
  • 2 1/4 in overall length for extended reach

1/4-20 UNC drill/tap bit for metalworking

The Greenlee DTAP1/4-20 combines drilling, tapping and countersinking in a single high-speed steel bit. It creates a 1/4 inch -20 UNC thread in one operation, reducing tool changes on the job site. The bit suits maintenance, fabrication and automotive repair tasks where threaded holes are required.

Fits standard drill chucks for portable use

The 2 1/4 inch overall length allows access in tight work areas while remaining compatible with common drill drivers. Steel construction withstands repeated use in ferrous and non-ferrous materials. It does not suit applications needing larger thread diameters or dedicated machine-tapping setups.

How it compares

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

Price $6.99
Cheaper than about 92% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameGreenlee Textron
Product typeDies & Taps
Size & build
Main materialSteel

Questions about this item

How quickly does the 1/4-20 UNC thread size dull when drilling and tapping steel all day?

The high-speed steel construction resists wear during repeated drill/tap/countersink cycles in metal.

Does the bit generate excess heat during continuous drilling and tapping in a single pass?

The combined drill/tap/countersink design reduces friction by cutting threads in one operation, limiting heat buildup.

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