Accupro T1634243 Spiral Flute Tap 6-32 Bottoming 3 Flute

Product Description

The ACCUPRO T1634243 is a spiral flute bottoming tap designed for cutting 6-32 unified coarse internal threads in blind holes. It is ground from vanadium high speed steel and finished with a black oxide coating that provides moderate lubricity and corrosion resistance. The tap features three right-hand flutes with a 33-degree helix angle, which evacuates chips upward out of the hole during the threading operation. Thread class of fit is 2B with an H3 thread limit, suitable for standard fastener assemblies requiring a medium-fit tolerance. Overall length is 2 inches with a thread length of 0.315 inches.

This tap is suited for machining shops, maintenance facilities, and tool-and-die operations where 6-32 blind-hole threading is required in steel, aluminum, and similar machinable materials. The bottoming chamfer style allows threading to the bottom of a blind hole where through-hole taps cannot reach. It is commonly used in precision sheet metal fabrication, electronic enclosure assembly, and general machine repair where 6-32 fastener bosses are standard. A shank diameter of 0.141 inches fits standard tap holders and collet chucks sized for this thread range.

Key Features

• Bottoming chamfer for full-depth threading in blind holes
• 33-degree right-hand spiral flute helix for efficient upward chip evacuation
• Vanadium high speed steel construction for wear resistance in ferrous and non-ferrous materials
• Black oxide finish reduces friction and provides light corrosion protection
• H3 thread limit with 2B class of fit for standard tolerance fastener applications
• Medium flute style balances core strength with chip clearance

Compatibility

Designed as an OEM-style replacement or standard production tap for use in any 6-32 blind-hole threading application requiring a bottoming chamfer and 2B class of fit.

Installation Notes

This tap should be installed in a properly sized tap holder or collet chuck and run at speeds appropriate for the workpiece material. Always ensure the machine spindle and workpiece are secured before starting the threading cycle. Use cutting fluid suited to the material being tapped to extend tool life and improve thread quality. Do not force the tap if resistance increases sharply, as this may indicate chip packing or tool breakage risk in a blind hole.