Guhring 9039020095250 Spiral Point Tap 3/8-24 Unf

Product Description

The GUHRING 9039020095250 is a spiral point tap designed for cutting internal threads in through-hole applications. Built from HSS-E cobalt high-speed steel, it handles steel workpieces with improved wear resistance compared to standard HSS tools. The tap cuts a 3/8-24 UNF right-hand thread to a 2B class of fit, with a plug chamfer that distributes cutting load across several leading threads. Overall length is 2.941 inches, thread length is 0.787 inches, and the shank diameter is 0.381 inches. The bright, uncoated finish suits general-purpose threading without specialized coolant requirements.

This tap is suited for threading through-holes in steel components in manufacturing, maintenance, and fabrication environments. The spiral point geometry pushes chips forward ahead of the tap, making it effective in through-hole setups where chip evacuation ahead of the cutting action keeps the flutes clear. It is part of the GUHRING Series 3902 line and carries an H3/H4 thread limit, which accommodates standard 2B fit tolerances used in common fastener and mechanical assembly work.

Key Features

• HSS-E cobalt construction for improved hardness and heat resistance when threading steel
• Spiral point geometry pushes chips forward, ideal for through-hole threading
• Plug chamfer with 3 flutes for balanced cutting load and smooth entry
• 3/8-24 UNF thread form, right-hand cut, 2B class of fit
• H3/H4 thread limit for consistent tolerance control on standard fastener fits
• Bright, uncoated finish — no coolant-through requirement

Compatibility

Designed for through-hole threading in steel workpieces requiring a 3/8-24 UNF, 2B class of fit internal thread. Fits standard tap holders and collet chucks accepting a 0.381-inch shank diameter.

Installation Notes

Installation is performed by machinists and tool-and-die or maintenance technicians using a tap wrench, tapping head, or CNC spindle. Always ensure the workpiece is securely fixtured and the hole is drilled to the correct tap drill diameter before threading. Apply cutting fluid appropriate for the workpiece material to extend tap life and improve thread finish. Do not reverse the tap under power without confirming the machine or holder supports reverse-feed tapping.