Guhring 9048813095250 Spiral Flute Tap 3/8-16 Unc

Product Description

The GUHRING 9048813095250 is a spiral flute tap designed for threading blind holes in a wide range of ferrous and non-ferrous materials. It cuts a 3/8-16 UNC thread to a 2B/3B class of fit using a 3-flute, right-hand spiral design with a 40-degree helix angle. The modified bottoming chamfer allows the tap to reach close to the bottom of a blind hole while still providing controlled chip evacuation. Constructed from cobalt high-speed steel and finished with GUHRING's Ignator coating, this tap is suited for production tapping in materials ranging from aluminum alloy to stainless and heat-treated steel. Machinists and tool-and-die professionals use this tap in CNC machining centers and manual tapping operations alike.

This tap is intended for blind hole threading applications across a broad material spectrum including alloy steel, alloy tool steel, aluminum alloy, case-hardened steel, cast iron, ductile iron, free-cutting steel, heat-treated steel, malleable cast iron, stainless steel, structural steel, and tool steel. Its fast flute style and 40-degree helix promote chip pullback out of the hole, reducing tap breakage risk in interrupted or deep blind hole cuts. It is well suited to both job shop and production environments where 3/8-16 UNC internal threads are required.

Key Features

• 3/8-16 UNC thread form, right-hand thread and right-hand flute
• Modified bottoming chamfer for threading close to the bottom of blind holes
• 40-degree helix angle with fast flute style for effective chip evacuation
• Cobalt HSS construction with Ignator coating for extended tool life in hard and abrasive materials
• H3 thread limit, 2B/3B class of fit for standard tolerance threading
• 3-flute design balances chip removal and thread form stability

Compatibility

Designed for blind hole tapping of 3/8-16 UNC threads in alloy steel, aluminum alloy, stainless steel, cast iron, tool steel, and related ferrous and non-ferrous materials as specified in GUHRING Series 4881.

Installation Notes

This tap is installed and operated by machinists using CNC machining centers, drill presses, or manual tapping equipment. Ensure the workpiece is securely fixtured and the spindle is properly aligned before tapping to prevent tap breakage. Use a cutting fluid or tapping compound appropriate for the workpiece material. Follow all machine guarding and lockout/tagout procedures before tool changes or setup adjustments.