OSG Spiral Flute Tap: M8x1 Metric, D5 / 4H-6H, 3 Flute

An OSG spiral flute tap is used for threading blind holes in materials such as steel, stainless steel, and aluminum. Its spiral design pulls chips upward and out of the hole, preventing clogging and ensuring clean threads. This M8x1 metric tap with a modified bottoming chamfer is ideal for threading close to the bottom of a blind hole.

The OSG 2991308 is a spiral flute tap with M8x1 metric thread, D5 / 4H-6H tolerance, 3 flutes, and a modified bottoming chamfer. It is designed for general purpose threading of blind holes in a range of materials. The D5 / 4H-6H designation indicates a precision ground thread form for accurate fit.

3G Electric supplies OSG taps, including the 2991308 spiral flute tap, to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we source genuine OSG cutting tools and support your procurement with technical guidance on thread tolerances and material compatibility.

For blind holes, choose a spiral flute tap like the OSG 2991308 to evacuate chips upward. Match the tap's thread size (M8x1), tolerance class (D5 / 4H-6H), and chamfer type (modified bottoming) to your hole depth and material. Consult the manufacturer's speed and feed recommendations for optimal thread quality and tool life.