Drillco bottoming tap details
Drillco 7/8-14 Nitro Bottoming Tap (20N156FB)
Drillco 20N156FB 7/8-14 HSS Nitro Bottoming Tap is a professional-grade straight flute hand tap designed to produce clean, accurate threads in a wide variety of machining environments. With a bottoming chamfer that allows threading closer to the bottom of blind holes, this tap is ideal for finishing threads where space is limited. Engineered for durability and consistent performance, it’s well-suited for both production operations and thread repair tasks across a broad range of materials.
Constructed from high-speed steel (HSS) with a high carbon content for superior hardness and wear resistance.
Nitro (black oxide) finish enhances lubricity and tool longevity under load.
Bottoming chamfer provides threading access close to the bottom of blind holes.
Standard square shank ensures compatibility with common tap wrenches and holders.
Ideal for finishing threads in blind holes where full thread depth is required.
Improved wear resistance and chip evacuation reduce downtime.
Excellent for general machine shop use, maintenance, and threading repairs.
Technical Specifications:
Thread Size: 7/8-14
Type: Bottoming Tap
Material: High Speed Steel (HSS)
Finish: Nitro (Black Oxide)
Flute Type: Straight
Chamfer: Bottoming
Country of Origin: USA
Product identification
- Brand: Drillco
- Model / MPN: 20N156FB
