OSG Spiral Flute Tap: #4-40 UNC, H6 / 2B, 2 Flute, Modified Bottoming Chamfer (MPN 1748401)

The OSG spiral flute tap #4-40 UNC is designed for threading blind holes in steel and stainless steel. Its spiral flute design lifts chips upward, preventing clogging in deep or blind holes. It is commonly used in automotive, aerospace, and general manufacturing applications where precise internal threads are required.

The OSG spiral flute tap has a #4-40 UNC thread size, H6 tolerance for the tap, and produces a 2B class fit in the workpiece. It features 2 flutes and a modified bottoming chamfer, allowing threading close to the bottom of blind holes. The manufacturer part number is 1748401.

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 time; we supply genuine OSG cutting tools for steel and stainless steel threading applications.

To select the right OSG spiral flute tap, match the thread size (e.g., #4-40 UNC) and tolerance (H6) to your workpiece requirements. For blind holes in steel or stainless steel, choose a modified bottoming chamfer and 2-flute design. OSG taps are engineered for chip evacuation; ensure your material hardness aligns with the tap's coating and geometry.