Osg 1400131600 Thread Forming Tap 5/16-18 Unc Plug Cobalt

Product Description

The OSG 1400131600 is a thread forming tap in the HY-PRO NRT series, designed to cold-form internal threads in ductile metals without cutting or producing chips. Using a plug chamfer with 4 to 4.5 chamfered threads, it displaces material to create strong, work-hardened threads in through-hole applications. Built from cobalt high-speed steel with a bright finish, this tap handles demanding materials including alloy steel, carbon steel, stainless steel, hardened steel, die steel, and aluminum. The H5 thread limit ensures consistent fit for 5/16-18 UNC threads. Overall length is 2.719 inches with a tapping depth of 1.126 inches. Installation is right-hand direction. Used by machinists and maintenance technicians in production and repair environments.

This tap is suited for through-hole threading operations on ferrous and non-ferrous materials across a wide hardness range. Applicable material codes are P and N, covering carbon and alloy steels as well as non-ferrous metals such as aluminum. Typical applications include production tapping on CNC machining centers, drill presses, and manual tapping setups where chip-free thread forming is preferred over cut tapping for improved thread strength and surface finish.

Key Features

• Thread forming design produces no chips, reducing tap breakage risk and eliminating chip clearing in blind and through holes
• Cobalt high-speed steel construction for improved heat and wear resistance in tough materials
• Plug chamfer with 4 to 4.5 chamfered threads for progressive thread engagement on through-hole applications
• H5 thread limit for controlled fit and consistent thread tolerance
• Right-hand thread direction, 5/16-18 UNC thread standard
• Bright finish for use across a broad range of material types without specialized coating requirements

Compatibility

Rated for use in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Designed for through-hole threading applications requiring 5/16-18 UNC internal threads.

Installation Notes

Thread forming taps require higher torque than cut taps and must be used with an appropriate tapping fluid or cutting oil matched to the workpiece material. Ensure the tap driver or holder is properly aligned to avoid tap breakage. Verify spindle speed and feed rate are within the recommended range for the material and tap size before operation. Secure the workpiece fully before beginning the tapping cycle.