GREENLEE Drill, Tap, Countersink: 1/4"-20 UNC
The GREENLEE Drill, Tap, Countersink (MPN LDTAP1/4-20) is a combination tool for 1/4"-20 UNC threading, with a 3-inch overall length. It is not impact rated.
SKU 3G-OTH-411664
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Product Description
The GREENLEE Drill, Tap, Countersink (MPN LDTAP1/4-20) is a combination tool for 1/4"-20 UNC threading, with a 3-inch overall length. It is not impact rated.
Frequently Asked Questions
What is the GREENLEE Drill, Tap, Countersink used for?
The GREENLEE LDTAP1/4-20 is a combination tool that drills, taps, and countersinks in one operation for 1/4”-20 UNC threads. It is commonly used in metalworking and electrical panel fabrication to create threaded holes and chamfered edges without changing tools.
What are the specifications of the GREENLEE LDTAP1/4-20?
The GREENLEE LDTAP1/4-20 has a 1/4”-20 UNC thread size and a 3-inch overall length. It is not impact rated. The manufacturer part number is LDTAP1/4-20. This combination tool integrates drilling, tapping, and countersinking for efficient single-pass threading.
Where to buy the GREENLEE LDTAP1/4-20 worldwide?
3G Electric supplies the GREENLEE LDTAP1/4-20 worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this combination drill, tap, and countersink tool for your operations.
How to select the correct drill tap countersink size?
To select the correct drill tap countersink, match the thread size (e.g., 1/4”-20 UNC) and overall length to your material thickness and hole depth. Ensure the tool is not impact rated if using a standard drill. The GREENLEE LDTAP1/4-20 combines all three functions for efficient threading.
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3G Electric supplies GREENLEE drill tap/countersinks. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.




