Osg 6006000 Hand Sti Tap 5-40 Unc H2 3 Flutes

Product Description

The OSG 6006000 is a hand STI tap designed for cutting Screw Thread Insert (STI) internal threads in a 5-40 UNC configuration. It carries an H2 thread limit for consistent tolerance control and features 3 flutes with a plug chamfer, making it suited for through-hole and moderately deep blind-hole tapping applications. Constructed from high speed steel with a bright finish, this tap delivers reliable cutting performance across a range of common shop and field materials. Licensed machinists, maintenance technicians, and tool-and-die professionals install this tap by hand or with a standard tap wrench in bench and repair work.

This tap is intended for use where an STI thread insert is required to restore or create a stronger threaded hole. The 5-40 UNC designation and H2 limit make it well suited for precision-fit insert applications in aluminum, carbon steel, cast iron, and hardened steel. The plug chamfer provides a moderate lead-in of typically 3 to 5 threads, balancing starting ease with the ability to tap close to the bottom of a hole. It fits standard hand tapping setups and is appropriate for both production repair and maintenance environments.

Key Features

• 5-40 UNC thread form with H2 thread limit for controlled tolerance fit
• STI (Screw Thread Insert) profile for use with threaded insert installation
• 3-flute plug chamfer design for moderate lead-in in through and blind holes
• High speed steel construction for durability across aluminum, carbon steel, cast iron, and hardened steel
• Bright finish with no coating for straightforward inspection and standard use
• Compact overall length of 1-15/16 inches supports use in confined workspaces

Compatibility

Designed for hand tapping applications requiring a 5-40 UNC STI thread form. Compatible materials include aluminum, carbon steel, cast iron, and hardened steel as specified by the manufacturer. Fits standard tap wrenches accepting a 0.1100-inch square drive.

Installation Notes

This tap is installed by hand using a standard tap wrench; power tapping is not the intended application. Always secure the workpiece and ensure the tap is started square to the hole to prevent breakage. Apply an appropriate cutting fluid for the material being tapped. Inspect the tap for wear or chipping before each use, as a damaged high speed steel tap can seize or break in hardened materials.