Osg 1101600803 Spiral Point Tap 1/4-20 Unc Nitride Hss

Product Description

The OSG 1101600803 is a spiral point plug tap designed for cutting 1/4-20 UNC right-hand threads in through-hole applications. Built from Vanadium High Speed Steel (HSS-E) with a nitride coating, this tap delivers extended tool life in production tapping environments. The spiral point geometry pushes chips forward ahead of the cut, keeping flutes clear and reducing the risk of chip packing in through-holes. With 3 flutes, an H5 thread limit, and a 2B class of fit, it produces accurate, consistent threads suited to standard fastener assembly tolerances. Licensed trades machinists, tool-and-die workers, and maintenance technicians are the primary users of this tap.

This tap is well suited for through-hole tapping in aluminum and cast aluminum workpieces, though the HSS-E construction also handles mild steel and similar materials under appropriate cutting conditions. The plug chamfer provides a gradual lead-in with 3 to 5 chamfered threads, making it the standard choice for production runs where the tap enters a pre-drilled through-hole. It is a common general-purpose tap for CNC tapping heads, drill press setups, and hand-tapping applications where chip evacuation is a priority.

Key Features

• Spiral point geometry pushes chips forward, ideal for through-hole tapping
• Vanadium High Speed Steel (HSS-E) construction for increased wear resistance
• Nitride coating reduces friction and improves tool life in aluminum and ferrous materials
• H5 thread limit and 2B class of fit for standard fastener-grade thread accuracy
• Plug chamfer with gradual lead-in suits production through-hole applications
• Right-hand thread direction, no coolant-through requirement

Compatibility

Designed for cutting 1/4-20 UNC right-hand threads in through-hole applications, with rated material compatibility for aluminum and cast aluminum. Part of OSG Series 11016.

Installation Notes

Install in a tap holder, CNC tapping head, or drill press with appropriate feed rate for the workpiece material. Ensure the tap is properly aligned with the pre-drilled pilot hole before engagement to avoid tap breakage. Apply cutting fluid appropriate for the workpiece material, particularly when tapping aluminum or steel. Power down and secure the machine before changing or inspecting the tap.