OSG Spiral Flute Tap: #4-40 UNC, H3 / 2B-3B, 3 Flute

The OSG spiral flute tap #4-40 UNC is designed for threading blind holes in steel and stainless steel. Its spiral flute design evacuates chips upward, preventing clogging in deep or blind holes. The modified bottoming chamfer allows threading close to the hole bottom, making it ideal for precision tapping in industrial manufacturing and maintenance applications.

The OSG spiral flute tap MPN 1722001 is a #4-40 UNC tap with a H3 / 2B-3B tolerance class. It has 3 flutes and a modified bottoming chamfer. This tap is designed for threading steel and stainless steel. The H3 tolerance ensures precise thread fit for 2B-3B class holes, suitable for high-accuracy industrial applications.

You can source OSG spiral flute taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead times. 3G Electric supplies genuine OSG cutting tools, including the #4-40 UNC spiral flute tap MPN 1722001, to customers across industries.

To select the correct OSG tap for steel threading, match the tap size and thread pitch to your hole specifications. For blind holes in steel, choose a spiral flute tap like the #4-40 UNC with a modified bottoming chamfer. Ensure the tap tolerance (e.g., H3 / 2B-3B) aligns with your required thread class. Consult OSG's technical data for material-specific recommendations.