Norseman Drill & Tool Type 38 Metric 30º Helix Angle Bright Finish Spiral Flute Semi-Bottoming Taps

Norseman Drill & Tool Type 38 Metric 30º Helix Angle Bright Finish Spiral Flute Semi-Bottoming Taps

Norseman Drill & Tool Type 38 Metric Spiral Flute Semi-Bottoming Taps are engineered for smooth, accurate, and efficient threading in non-ferrous and soft materials. Featuring a 30º helix angle and a high-quality bright finish, these metric taps provide clean cutting action, excellent chip evacuation, and long-lasting performance across a wide variety of applications.

Bright Finish for Clean Cutting and Superior Surface Quality

The bright finish enhances lubricity and reduces friction, making these taps ideal for materials that tend to gall or smear. This finish is especially recommended for aluminum, zinc, copper, hardwoods, refrigeration die castings, automotive hardware, and epoxy-based plastics. The smooth surface promotes cooler cutting temperatures, extended tool life, and improved thread quality with minimal burr formation.

Optimized 30º Helix Angle for Effective Chip Removal

Ideal for Blind and Through Holes

With a 30º helix angle, the spiral flute design efficiently lifts chips out of the hole, preventing packing and protecting the tap from breakage. This makes Type 38 taps well-suited for blind holes where chip evacuation is essential, as well as through holes requiring consistent thread quality. The geometry ensures smooth entry, reduced torque, and enhanced thread accuracy.

Semi-Bottoming Design for Versatile Threading Performance

Thread Close to the Bottom of Blind Holes

Semi-bottoming taps combine the advantages of a plug tap with the ability to cut threads closer to the bottom of a blind hole. This versatility makes them ideal for precision applications in manufacturing, assembly, and repair operations that require tight tolerances and clean finishes.

Key Benefits

• Bright finish ensures smooth cutting and reduced friction

• Recommended for aluminum, zinc, copper, plastics, wood, and die-cast materials

• 30º helix angle improves chip evacuation and reduces tap breakage

• Spiral flute design ideal for blind or through-hole metric tapping

• Semi-bottoming profile produces accurate threads near hole bottoms

Norseman Type 38 Metric Bright Finish Spiral Flute Semi-Bottoming Taps deliver reliable, high-quality threading performance for a broad range of non-ferrous and soft materials.