Guhring 9048853063500 Spiral Point Tap 1/4-20 Unc

Product Description

The GUHRING 9048853063500 is a spiral point tap designed for through-hole threading in steel and similar materials. It is manufactured from HSS-E cobalt high-speed steel and carries a Ignator coating for extended tool life under production conditions. The tap is configured with a plug chamfer, 3 flutes, and a right-hand thread in the 1/4-20 UNC standard. Thread limit is H4/H5, and the class of fit covers both 2B and 3B applications. Overall length is 2.5 inches with a thread length of 0.63 inches. This tap is suited for machinists, tool-and-die technicians, and maintenance professionals threading steel workpieces in manual or CNC tapping operations.

This tap is used in through-hole threading applications where a plug chamfer lead is appropriate for starting in a pre-drilled hole that passes fully through the workpiece. The 1/4-20 UNC thread form is one of the most common unified coarse thread sizes in North American manufacturing and maintenance. The HSS-E cobalt construction makes it well-suited for harder steels and interrupted or abrasive materials where standard HSS taps wear prematurely. It is appropriate for job shop, production, and MRO environments.

Key Features

• 1/4-20 UNC thread form with plug chamfer for through-hole entry
• 3-flute spiral point geometry pushes chips forward ahead of the tap
• HSS-E cobalt base material improves wear resistance in steel applications
• Ignator coating reduces friction and extends tool life in production use
• H4/H5 thread limit covers 2B and 3B class of fit requirements
• Right-hand thread, no coolant-through — suitable for standard tapping setups

Compatibility

Designed for through-hole threading in steel per Series 4885 specifications. Suitable for 1/4-20 UNC tapping applications requiring 2B or 3B class of fit with H4/H5 thread limit.

Installation Notes

This tap is installed and operated by machinists or maintenance technicians using a tap wrench, tapping head, or CNC rigid tapping cycle. Ensure the workpiece is securely fixtured and the pilot hole diameter is correct for a 1/4-20 UNC tap before beginning the operation. Apply appropriate cutting fluid for the material being tapped. Do not reverse under load without confirming the machine or tap handle supports controlled back-out to avoid tap breakage.