Osg 1400114605 Thread Forming Tap 8-32 Unc Cobalt Tin

Product Description

The OSG 1400114605 is a thread forming tap designed for blind hole threading in a wide range of metallic materials. It carries an 8-32 UNC thread specification with a modified bottoming chamfer of 2 to 2.5 threads, making it suited for threading close to the bottom of a blind hole without cutting chips. The tap is manufactured from cobalt high-speed steel and finished with a titanium nitride (TiN) coating to extend tool life and reduce friction during the forming process. Overall length is 2.125 inches with a thread length of 0.374 inches and a tapping depth of 0.752 inches. Part of the OSG HY-PRO NRT Series 14001 product line, this tap is intended for use by machinists, tool-and-die makers, and maintenance professionals.

This tap is engineered for blind hole threading applications where chip evacuation is a concern, since thread forming displaces material rather than cutting it. It is appropriate for use in production and job-shop environments on CNC tapping centers, drill presses, and manual lathes. Recommended work materials include alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel, covering a broad range of common manufacturing and repair applications. The right-hand thread direction and H6 thread limit support close-tolerance fits in precision assemblies.

Key Features

• Modified bottoming chamfer (2 to 2.5 threads) for threading near the bottom of blind holes
• Cobalt high-speed steel construction provides heat and wear resistance in tough alloys
• TiN coating reduces friction and extends tap life across high-volume runs
• Chipless thread forming eliminates chip-related tap breakage in blind holes
• H6 thread limit for controlled, close-tolerance thread production
• Right-hand thread direction; compatible with standard tapping attachments and holders

Compatibility

Designed for use on alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Suitable for blind hole threading applications requiring an 8-32 UNC right-hand thread. Material application codes P and N confirm suitability across ferrous and non-ferrous metals as classified in the input data.

Installation Notes

Thread forming taps require a properly sized forming tap drill hole, which differs from a standard cut tap pilot hole — consult a forming tap drill chart for the correct pre-drill diameter before use. Always apply appropriate tapping fluid or cutting oil for the workpiece material to reduce galling, particularly in stainless steel and hardened steel. Power down or de-energize any CNC or automated tapping equipment before changing tooling. Follow applicable shop safety standards and machine manufacturer guidelines for spindle speed and feed rate settings.