Osg 1412400 Spiral Flute Tap 6-32 Unc Plug Hss

Product Description

The OSG 1412400 is a spiral flute tap designed for cutting 6-32 UNC internal threads in a wide range of ferrous and non-ferrous materials. It features a plug chamfer for standard through-hole and blind-hole applications, with a 50-degree helix angle that efficiently evacuates chips upward out of the hole during the tapping cycle. Manufactured from high-speed steel with a bright uncoated finish, this tap carries an H3 thread limit and a 2B class of fit, making it suitable for general-purpose threading where standard tolerance fastener engagement is required. Overall length is 2 inches. Licensed machinists, tool-and-die makers, and maintenance technicians typically select this tap for production and repair work.

This tap is appropriate for threading operations in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The 2-flute spiral design moves chips away from the cutting zone, which reduces the risk of chip packing in blind holes and minimizes the chance of tap breakage in tougher materials. Its compact geometry suits both manual and CNC tapping applications where a 6-32 UNC thread form is specified. The plug chamfer provides a gradual lead-in that distributes cutting load across the first few threads.

Key Features

• 6-32 UNC thread form, 32 threads per inch, right-hand thread direction
• 50-degree helix angle with 2 spiral flutes for upward chip evacuation
• Plug chamfer for use in through-holes and shallow blind holes
• H3 thread limit, 2B class of fit for standard tolerance applications
• High-speed steel construction, bright uncoated finish
• Compatible with aluminum, cast iron, and carbon steel workpiece materials

Compatibility

Designed for use in both manual tap handles and CNC rigid-tapping setups calling for a 6-32 UNC plug tap. Suitable for threading aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel as listed in OSG Series 107 specifications.

Installation Notes

Secure the workpiece firmly before beginning any tapping operation and ensure the tap is properly aligned with the pilot hole to avoid thread distortion or tap breakage. Always apply an appropriate cutting fluid or tapping compound for the workpiece material to extend tool life and improve thread finish. In manual applications, use a calibrated tap wrench sized for the shank diameter; in machine applications, verify spindle speed and feed rate match the recommended parameters for the material and tap diameter. Never force a tap that has stopped turning, as this commonly results in breakage.