Osg 1400121200 Thread Forming Tap 10-32 Unf Plug Cobalt

Product Description

The OSG 1400121200 is a thread forming tap in the HY-PRO NRT series, designed for cold-forming internal threads without cutting or producing chips. Manufactured from cobalt high-speed steel with a bright finish, this plug-style tap is built for through-hole threading applications in a wide range of metallic workpiece materials. It produces a 10-32 UNF right-hand thread to a Class 3B fit with a Thread Limit of H3, making it suitable for precision fastener applications where tight tolerances are required. Overall length is 2.375 inches with a shank diameter of 0.194 inches.

This tap is suited for through-hole threading operations in production and maintenance machining environments. Its cobalt construction provides improved heat resistance compared to standard high-speed steel, making it a strong choice when threading alloy steel, carbon steel, stainless steel, hardened steel, die steel, and aluminum. The plug chamfer with 4 to 4.5 chamfered threads allows for easy starting in through-hole applications. It is commonly used by machinists, tool-and-die makers, and maintenance technicians working on precision mechanical assemblies.

Key Features

• Thread forming (chipless) design eliminates chip evacuation concerns in through-hole applications
• Cobalt high-speed steel construction for improved heat and wear resistance
• Plug chamfer with 4 to 4.5 chamfered threads for reliable thread entry
• H3 thread limit to Class 3B fit for precision tolerance control
• Right-hand, 10-32 UNF thread form at 32 threads per inch
• Compatible with multiple material types including stainless steel, alloy steel, and aluminum

Compatibility

Designed for through-hole threading in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Material application codes P and N apply.

Installation Notes

Thread forming taps require appropriate tapping fluid or cutting oil matched to the workpiece material - consult the material manufacturer guidelines before use. Ensure the workpiece is securely fixtured and that the tap is aligned perpendicular to the hole before engagement. Power down all equipment and secure the workpiece before tool changes. Use a torque-controlled tapping driver where possible to avoid tap breakage, especially in harder materials such as stainless or hardened steel.