Osg 1400143600 Thread Forming Tap 1/2-13 Unc Plug Cobalt

Product Description

The OSG 1400143600 is a thread forming tap in the HY-PRO NRT series, designed to produce 1/2-13 UNC internal threads without cutting or removing material. Thread forming displaces metal rather than cutting it, resulting in stronger threads with better surface finish and no chips to clear. This tap features a plug chamfer with 4 to 4.5 chamfered threads for progressive thread engagement. Made from cobalt high-speed steel with a bright finish, it carries an H4 thread limit. Overall length is 3.375 inches with a tapping depth of 1.933 inches. It is installed by machinists, tool-and-die makers, and maintenance technicians working on precision threading applications.

The 1400143600 is suited for through-hole threading operations in a range of ferrous and non-ferrous workpiece materials including alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum. The right-hand thread direction and plug chamfer make it appropriate for CNC machining centers, drill presses, and tapping machines where controlled feed rates and adequate lubrication are maintained. It is a good fit for production and job-shop environments requiring consistent H4 tolerance threads in 1/2-13 UNC applications.

Key Features

• Thread forming (chipless) action produces stronger threads and eliminates chip-clearing concerns in through-hole applications
• Cobalt high-speed steel construction provides heat resistance and extended tool life in tough materials
• Plug chamfer with 4 to 4.5 chamfered threads for gradual thread engagement and reduced starting torque
• H4 thread limit for consistent dimensional control on 1/2-13 UNC threads
• Bright finish with no coating for straightforward regrinding and visual inspection
• Right-hand thread direction compatible with standard tapping equipment and fixturing

Compatibility

Designed for through-hole threading in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Compatible with standard 1/2-13 UNC tapping applications requiring an H4 thread limit and plug chamfer entry.

Installation Notes

Thread forming taps require higher torque than cutting taps and must be used with a thread forming lubricant or cutting fluid appropriate for the workpiece material. Secure the workpiece and verify spindle alignment before tapping to avoid tap breakage. Always confirm the machine feed rate matches the tap pitch to prevent thread damage. Follow shop safety procedures and wear appropriate eye and hand protection when operating tapping equipment.