Accupro T1620585 Spiral Point Tap 1/2-20 3 Flutes

Product Description

The ACCUPRO T1620585 is a spiral point tap designed for cutting right-hand internal threads in stainless steel and other ferrous materials. Built from 3% Vanadium High Speed Steel with an oxide finish, this tap delivers improved wear resistance and heat dissipation during threading operations. It produces a 1/2-20 UNF thread with a 2B class of fit and an H5 thread limit, meeting tight tolerance requirements on production and repair jobs. The plug chamfer provides a balanced starting taper suitable for through-hole applications. Overall length is 3.38 inches with a thread length of 29 millimeters.

This tap is suited for through-hole threading operations in stainless steel, mild steel, and similar ferrous alloys. The spiral point geometry pushes chips forward ahead of the cutting edge, keeping flutes clear and reducing the risk of chip packing in machine tapping setups. It is a standard choice for machinists and maintenance technicians running CNC or manual tapping operations that require clean, accurate 1/2-20 UNF threads in production or field repair environments.

Key Features

• 1/2-20 UNF thread size with 2B class of fit and H5 thread limit for tight tolerances
• 3% Vanadium High Speed Steel construction for improved wear resistance in stainless steel applications
• Oxide finish reduces friction and improves lubricity during cutting
• Plug chamfer for reliable starting in through-hole applications
• Spiral point geometry pushes chips forward to maintain clear flutes during machine tapping
• Right-hand thread direction, no coolant-through requirement

Compatibility

Designed for through-hole threading applications in stainless steel and ferrous materials requiring a 1/2-20 UNF right-hand thread with a 2B class of fit.

Installation Notes

This tap is installed by qualified machinists or maintenance technicians using a CNC machining center, drill press, or manual tapping fixture. Always secure the workpiece and ensure proper alignment before engaging the tap to avoid tap breakage. Use an appropriate cutting fluid or tapping compound rated for stainless steel to extend tool life and improve thread quality. Power down and de-energize any machine before changing or securing the tap in the holder.