Osg 1400143800 Thread Forming Tap 1/2-13 Unc Plug Cobalt

Product Description

The OSG 1400143800 is a thread forming tap in the HY-PRO NRT series, designed for cold-forming internal threads without cutting or producing chips. It produces a 1/2-13 UNC right-hand thread using a plug chamfer with 4 to 4.5 chamfered threads, making it suited for through-hole threading applications. Manufactured from cobalt with a bright finish and an H6 thread limit, this tap delivers consistent thread geometry in demanding materials. Overall length is 3.375 inches with a shank diameter of 0.367 inches. Installation is performed by licensed machinists and tool-and-die professionals in production or maintenance environments.

This tap is rated for through-hole threading in a range of metals including alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. The cobalt construction allows it to handle harder ferrous and non-ferrous materials where standard high-speed steel taps may wear prematurely. It is a strong fit for job shops, maintenance repair operations, and production machining cells requiring reliable thread forming in medium to high-hardness workpieces.

Key Features

• Thread forming (chipless) design eliminates chip evacuation concerns in through-hole applications
• Cobalt construction for extended tool life in alloy steel, hardened steel, and stainless steel
• H6 thread limit for controlled tolerance threading
• Plug chamfer with 4 to 4.5 chamfered threads for standard through-hole entry
• Right-hand thread direction, 1/2-13 UNC pitch
• Bright finish with no coolant-through requirement

Compatibility

Designed for through-hole thread forming 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 are installed by machinists using a tapping head, CNC machine, or manual tap wrench with appropriate tapping fluid for the workpiece material. Ensure the pilot hole diameter is sized correctly for thread forming, as forming taps require a larger pilot hole than cutting taps for the same thread size. Secure the workpiece before tapping and verify spindle alignment to avoid tap breakage. Always de-energize and lock out any machine tool before changing or inspecting tooling.