Osg 1068402 Straight Flute Tap 8-32 Unc Plug Hss

Product Description

The OSG 1068402 is a straight flute tap designed to cut internal threads in a wide range of metals. It features an 8-32 UNC thread form with a plug chamfer, a 3B class of fit, and is manufactured from high-speed steel for durability under repeated use. With 2 flutes and a right-hand thread direction, it produces clean, accurate threads in through-holes and shallow blind holes. The H2 thread limit ensures consistent tolerancing for standard 3B-fit assemblies. Overall length is 2.125 inches with a thread length of 0.75 inches. This tap is suited for machinists, maintenance technicians, and tool-and-die professionals working in production or repair environments.

The OSG 1068402 is appropriate for tapping operations in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The plug chamfer style, with its moderate lead-in taper, works well in through-hole applications and is one of the most common tap styles used in general machining and repair work. It fits standard tap holders and machines used in both manual and CNC tapping setups.

Key Features

• 8-32 UNC right-hand thread form with 3B class of fit for standard fastener thread tolerances
• Plug chamfer provides moderate lead-in, suitable for through-hole tapping
• High-speed steel construction handles ferrous and non-ferrous materials including cast iron and aluminum alloys
• H2 thread limit for controlled tolerance in standard-fit assemblies
• 2-flute design aids chip clearance in short-chipping materials
• Overall length of 2.125 inches with 0.75 inches of thread length for compact reach

Compatibility

Designed for use in aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel. Fits standard tap holders and collet chucks accepting the shank size for this tap series.

Installation Notes

Install in a properly sized tap holder or chuck; ensure the holder is rated for the torque required by the workpiece material. Always use appropriate cutting fluid or tapping compound for the material being tapped to extend tool life and improve thread quality. Secure the workpiece firmly before starting and align the tap perpendicular to the hole to avoid tap breakage. Follow applicable shop safety procedures when operating drilling or tapping equipment.