Osg 1650509908 Spiral Flute Tap 10-24 Unc Bottoming

Product Description

The OSG 1650509908 is a spiral flute bottoming tap designed for cutting 10-24 UNC internal threads in a wide range of ferrous and non-ferrous metals. It features a 45-degree helix angle that pulls chips up and out of the hole, making it well-suited for blind-hole tapping applications where chip evacuation is critical. Built from powdered metal and finished with a V coating for increased wear resistance, this tap carries an H3 thread limit and a 2B class of fit. The overall length is 2.756 inches with a thread length of 0.326 inches and a tapping depth of 25 mm. Machinists and maintenance technicians working on ferrous and non-ferrous machining jobs will find this tap dependable for production and repair work alike.

The 1650509908 is intended for tapping 10-24 UNC blind holes in materials including alloy steel, low-carbon steel, medium-carbon steel, high-carbon steel, hardened steel, cast iron, aluminum, and cast aluminum. The bottoming chamfer style allows threads to be cut close to the bottom of a blind hole, making it appropriate for applications where full thread depth near the bottom is required. This tap is used on CNC machining centers, drill presses, and manual tapping setups across manufacturing, maintenance, and repair operations.

Key Features

• 45-degree right-hand spiral flute design promotes upward chip evacuation in blind holes
• Bottoming chamfer enables threading close to the base of blind holes
• Powdered metal construction with V coating for extended tool life in abrasive materials
• H3 thread limit with 2B class of fit for standard tolerance internal threads
• Right-hand thread direction, no coolant-through requirement
• 3 flutes provide good chip clearance and cutting efficiency at 24 threads per inch

Compatibility

Designed for cutting 10-24 UNC right-hand internal threads in alloy steel, aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, medium-carbon steel, and stainless steel. Part of OSG Series 16505.

Installation Notes

Installation is performed by machinists or maintenance technicians using standard tapping equipment. Ensure the workpiece is securely fixtured and the tap is properly aligned before beginning the cut. Use appropriate cutting fluid for the workpiece material to reduce heat and extend tap life. For blind holes, verify tapping depth does not exceed the rated tapping depth to avoid tap breakage.