Osg 2865008 Thread Forming Tap 6-32 Unc Bottoming Ticn

Product Description

The OSG 2865008 is a thread forming tap designed for blind hole threading in right-hand 6-32 UNC applications. It carries a 2B class of fit and features a bottoming chamfer with 1.5 to 2 chamfered threads, allowing threading close to the bottom of a blind hole. Manufactured from high-speed steel with a TiCN coating, it delivers improved wear resistance and reduced friction during the cold-forming process. With an overall length of 2 inches and a tapping depth of 0.685 inches, this tap is suited for precision thread work in close-tolerance production and maintenance environments. Machinists and tool-and-die technicians are the primary installers.

This tap is rated for use in aluminum, cast aluminum, low-carbon steel, and medium-carbon steel. It is best applied where chip-free threading is required, making it a strong fit for blind hole work on CNC machining centers, manual drill presses, and tapping arms. The bottoming chamfer makes it especially useful when thread engagement must begin near the base of a shallow blind hole. Its compact shank diameter of 0.141 inches suits standard tap holders designed for small-diameter taps in the 6-32 size range.

Key Features

• Bottoming chamfer with 1.5 to 2 chamfered threads for threading close to the base of blind holes
• TiCN coating improves surface hardness and reduces galling against aluminum and steel workpieces
• High-speed steel construction provides toughness across a range of material hardnesses
• Thread forming design displaces material rather than cutting, eliminating chips in blind hole applications
• Right-hand thread direction, 6-32 UNC, 2B class of fit for standard inch fastener compatibility
• No coolant-through requirement simplifies use on manual and standard CNC setups

Compatibility

Rated for use in aluminum, cast aluminum, low-carbon steel, and medium-carbon steel workpieces. Designed as an OEM-style replacement tap for 6-32 UNC blind hole threading applications requiring a 2B class of fit and a bottoming chamfer.

Installation Notes

Thread forming taps require proper lubrication matched to the workpiece material — use cutting oil for steel and a light oil or aluminum-specific fluid for aluminum alloys. Ensure the workpiece hole is drilled to the correct forming tap minor diameter before tapping, as thread forming taps require a larger pilot hole than cutting taps. Secure the tap in a properly sized tap holder to prevent slippage and maintain alignment. Verify spindle torque settings are appropriate for the 6-32 size to avoid tap breakage.