Osg 1731601 Spiral Point Tap 5/8-11 Unc Plug Hss

Product Description

The OSG 1731601 is a spiral point tap designed for threading 5/8-11 UNC holes in a range of ferrous materials. Spiral point geometry pushes chips forward ahead of the cut, making this tap well suited for through-hole applications where chip evacuation is critical. The plug chamfer provides a gradual lead-in with moderate cutting pressure. Built from vanadium high-speed steel (HSS-E) and finished with a steam oxide coating, the 1731601 delivers solid wear resistance and corrosion protection in production and maintenance threading operations. Licensed machinists, toolmakers, and maintenance technicians are the typical users.

This tap is rated for use in hardened steel, low-carbon steel, medium-carbon steel, and stainless steel. The 3B class of fit and H3 thread limit pair well with standard tolerance through-holes in general machining and fabrication environments. It is appropriate for manual tapping and CNC rigid tapping setups where coolant-through capability is not required. The Series 300 designation places it within OSG's standard production tap line.

Key Features

• Spiral point geometry pushes chips forward - optimized for through-hole threading
• 5/8-11 UNC thread form, right-hand cut
• Plug chamfer for moderate lead-in and balanced cutting force
• H3 thread limit and 3B class of fit for standard tolerance applications
• Vanadium high-speed steel (HSS-E) construction for toughness in ferrous materials
• Steam oxide coating for improved lubricity and corrosion resistance

Compatibility

Rated for threading hardened steel, low-carbon steel, medium-carbon steel, and stainless steel. Designed for through-hole applications where coolant-through is not required. Not intended for interrupted-thread or oversize applications.

Installation Notes

Install and operate this tap using appropriate tapping fluid or cutting oil suited to the workpiece material - stainless steel in particular benefits from sulfur-based or chlorinated cutting fluid. Ensure the tap is aligned perpendicular to the work surface before engagement to avoid cross-threading or tap breakage. When used in a CNC rigid tapping cycle, verify spindle speed and feed rate match the tap's recommended parameters for the material. Always shut down and lock out the machine before changing or inspecting taps.