Titan Usa TT91085 Spiral Point Plug Tap 1/2-13 Unc Hss

Product Description

The TITAN USA TT91085 is a spiral point plug tap designed for through-hole threading in a wide range of general-purpose materials. It cuts a 1/2-13 UNC thread profile using a three-flute, right-hand spiral point geometry that pushes chips forward ahead of the cutting zone, keeping the flutes clear and reducing the risk of chip packing. Built from high-speed steel with a bright, uncoated finish, this tap suits manual and machine tapping applications where a standard H3 thread limit and 2B/3B class of fit are required. The plug chamfer provides a moderate lead-in, making it well suited for through-hole work where the tap can exit the workpiece completely.

This tap is intended for general-purpose through-hole threading operations in ferrous and non-ferrous metals, plastics, and similar materials. It is used in machine shops, maintenance and repair environments, and production settings where 1/2-13 UNC fastener threads are common. The 3.375-inch overall length and 0.367-inch shank diameter fit standard tap holders and CNC rigid-tapping chucks. It is appropriate for manual tapping with a tap wrench or power tapping with a drill press, tapping machine, or machining center running at appropriate feed and speed for the material.

Key Features

• Spiral point geometry pushes chips forward, reducing chip packing in through-hole applications
• Plug chamfer provides moderate lead-in suitable for through-hole threading
• High-speed steel construction offers durability across general-purpose materials
• H3 thread limit and 2B/3B class of fit meet standard fastener thread tolerances
• Bright uncoated finish provides a baseline surface suitable for use with cutting fluid
• Right-hand thread direction compatible with standard tapping equipment

Compatibility

Designed for use in standard tap holders, quick-change tapping chucks, and manual tap wrenches that accept a 0.367-inch shank diameter. Suitable for general-purpose through-hole tapping where a 1/2-13 UNC H3 thread is specified.

Installation Notes

This tap should be installed by a machinist or qualified tradesperson familiar with tapping procedures and thread standards. Ensure the workpiece is securely fixtured and that the correct pilot hole diameter for 1/2-13 UNC has been drilled before tapping. Apply an appropriate cutting fluid for the material being threaded to extend tap life and improve thread quality. Do not reverse the tap under power without confirming the tapping machine or CNC control supports synchronized reversing.