Accupro T1640082 Spiral Point Tap 2-56 Plug 2B

Product Description

The ACCUPRO T1640082 is a spiral point tap designed for cutting 2-56 unified coarse threads in through-hole applications. Built from vanadium high-speed steel (HSS-E), it delivers improved wear resistance and heat tolerance compared to standard HSS tooling. The oxide finish reduces friction and provides light corrosion protection during use and storage. With a plug chamfer, this tap is suited for starting threads in holes that allow chip evacuation through the bottom. Machinists and tool-and-die professionals use this tap in manual tapping operations and machine tapping setups where consistent thread quality on small-diameter fastener holes is required.

This tap is intended for cutting 2-56 right-hand internal threads to a Class 2B fit with an H2 thread limit. It is commonly used in light manufacturing, precision assembly, and maintenance machining where small machine screws and electronic hardware fasteners are installed. The 2-flute spiral point design pushes chips forward ahead of the tap, making it well suited for tapping in metals and other materials where through-hole access is available.

Key Features

• Vanadium HSS-E construction for improved wear resistance over standard M2 high-speed steel
• Plug chamfer for reliable thread starting in through-hole applications
• Spiral point geometry pushes chips forward, reducing chip packing in the flutes
• Oxide finish reduces friction and provides surface protection
• H2 thread limit holds tight tolerances for Class 2B fits
• Right-hand thread direction, compatible with standard tapping equipment

Compatibility

Designed for cutting 2-56 unified right-hand internal threads to a Class 2B fit in through-hole applications. Suitable for use in hand tap holders and machine tapping heads configured for small-diameter taps.

Installation Notes

This tap should be installed by a qualified machinist or tooling professional familiar with small-diameter tapping operations. Always secure the workpiece and use appropriate cutting fluid for the material being tapped to reduce heat and extend tool life. Ensure the tapping spindle or holder is properly aligned to avoid tap breakage, which is a significant risk at the 2-56 diameter. Do not force the tap if resistance increases unexpectedly; back off to clear chips before continuing.