Osg 1405005008 Thread Forming Tap 10-24 Unc Bottoming

Product Description

The OSG 1405005008 is a bottoming-style thread forming tap designed for producing 10-24 UNC internal threads without cutting a chip. Manufactured from powdered metal high-speed steel and finished with a TiCN coating, this tap cold-forms threads by displacing material rather than removing it, resulting in stronger threads and longer tool life. It carries an H5 thread limit and is engineered for right-hand threading in blind hole applications. With an overall length of 2.375 inches and a tapping depth of 0.866 inches, it is suited for precision threading in tight-tolerance assemblies across industrial and mechanical trade work.

This tap is intended for blind hole threading operations across a range of metals including alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. The bottoming chamfer, with 1 to 1.5 chamfered threads, allows threading close to the bottom of a blind hole. It is commonly used by machinists, maintenance technicians, and tool-and-die professionals working with metal fabrication, equipment repair, and precision assembly applications.

Key Features

• Thread forming design displaces material rather than cutting, producing stronger threads with no chip evacuation required
• Powdered metal high-speed steel construction provides improved wear resistance and toughness over conventional HSS
• TiCN coating reduces friction and extends tool life in ferrous and non-ferrous metals
• Bottoming chamfer with 1 to 1.5 chamfered threads allows threading to near the bottom of blind holes
• H5 thread limit supports close-tolerance threading requirements
• Right-hand thread direction compatible with standard tapping equipment

Compatibility

Designed for blind hole threading in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces requiring 10-24 UNC internal threads. Part of the OSG EXOTAP VP-NRT series, Series 14050.

Installation Notes

Thread forming taps require a specific drill size matched to the material and thread form - consult a thread forming drill chart before selecting the pilot hole diameter, as the correct hole size differs from standard cut-tap drill sizes. Use appropriate tapping fluid or cutting oil suited to the workpiece material; dry tapping is not recommended for steel applications. Ensure the workpiece is securely fixtured and the tap is driven with a calibrated torque-limiting tap wrench or CNC tapping cycle to avoid overloading the tool. This tap is not designed for through-hole or chip-load applications where cut taps are more appropriate.