Guhring 9039970028450 Spiral Point Tap 4-48 Unf Tin

Product Description

The GUHRING 9039970028450 is a spiral point plug tap designed for through-hole threading in 4-48 UNF applications. Built from powdered metal and coated with titanium nitride (TiN), it delivers elevated hardness and wear resistance suited to stainless steel and other demanding materials. With three flutes and a plug chamfer, the tap progressively engages the workpiece and pushes chips ahead of the cutting edge into the through-hole. The right-hand thread direction and H2 thread limit support accurate Class 3B fits. Overall length is 1.882 inches with a shank diameter of 0.141 inches. This tap is appropriate for machinists and maintenance trades requiring reliable fine-thread formation at small diameters.

This tap is intended for through-hole threading operations where chip evacuation ahead of the tap is acceptable. The 4-48 UNF thread designation makes it suited for small fastener applications in precision assemblies, instrument enclosures, and mechanical components where fine thread engagement is required. The TiN coating reduces friction and extends tool life, particularly when threading stainless steel or similarly abrasive alloys. It is used in CNC tapping, drill press, and hand-tapping setups where a 4-48 right-hand thread is specified.

Key Features

• 4-48 UNF thread form with right-hand direction and Class 3B fit tolerance
• H2 thread limit for consistent dimensional accuracy across production runs
• Spiral point geometry pushes chips forward, clearing the cutting zone in through-hole applications
• Powdered metal construction provides higher hardness and wear resistance compared to standard HSS
• TiN coating reduces friction and extends service life, especially in stainless steel
• Plug chamfer with 3 flutes for progressive thread engagement and controlled torque load

Compatibility

Designed for through-hole threading of 4-48 UNF threads, with a stated material application of stainless steel. No specific machine or toolholder compatibility data was provided in the product input.

Installation Notes

This tap should be installed by a qualified machinist following standard tapping procedures. Ensure the workpiece is securely fixtured and the spindle or tapping head is properly aligned before engaging the tap. Use a suitable cutting fluid or tapping compound rated for the workpiece material, particularly when threading stainless steel, to reduce heat buildup and galling. Never reverse-drive a tap without first confirming adequate chip clearance, and inspect the tap for wear or chipping before each use.