Osg 0136008 Spiral Flute Tap 6-32 Unc Bottoming Ticn Hss

Product Description

The OSG 0136008 is a spiral flute bottoming tap designed for threading 6-32 UNC holes in a wide range of steel materials. Built from vanadium high-speed steel with a TiCN coating, it delivers increased hardness and wear resistance compared to standard HSS taps. The bottoming chamfer allows threading close to the bottom of blind holes, making it useful in tight-tolerance applications. With a 45-degree helix angle and right-hand spiral flute geometry, chips are pulled up and out of the hole efficiently. Licensed machinists, tool-and-die makers, and maintenance technicians typically reach for this tap when working with stainless steel, high-carbon steel, medium-carbon steel, or low-carbon steel.

This tap is suited for production and maintenance machining environments where 6-32 UNC internal threads are required in ferrous materials. Its 3B class of fit produces threads within standard tolerance for most commercial and precision fastener applications. The bottoming chamfer style is chosen when thread engagement must extend nearly to the bottom of a blind hole. At 2 inches overall length, it is compatible with standard tap holders and tapping heads used on drill presses, CNC machining centers, and manual mills.

Key Features

• Bottoming chamfer for threading to the bottom of blind holes
• TiCN coating increases surface hardness and extends tool life in ferrous materials
• 45-degree helix angle evacuates chips efficiently in spiral flute configuration
• Vanadium high-speed steel substrate handles stainless steel and carbon steel applications
• 3B class of fit meets standard UNC thread tolerance requirements
• H2 thread limit for consistent, close-tolerance thread production

Compatibility

Designed for cutting 6-32 UNC right-hand internal threads in stainless steel, high-carbon steel, medium-carbon steel, and low-carbon steel. No coolant-through capability; use of cutting fluid applied externally is standard practice with this tap.

Installation Notes

This tap is installed and operated by machinists using standard tap holders, floating tap heads, or rigid tapping attachments. Before tapping, drill the correct tap drill size for 6-32 UNC and deburr the entry. Apply cutting fluid appropriate for the workpiece material to reduce heat and tool wear. Do not exceed the tap's rated material application range, and back the tap out periodically to clear chips when tapping deep blind holes.