Osg 1727601 Spiral Point Tap 8-32 Unc 3 Flute Hss

Product Description

The OSG 1727601 is a spiral point tap designed for right-hand threading in a variety of steel materials. It cuts an 8-32 UNC thread form with a plug chamfer and three flutes, making it well suited for through-hole tapping applications where chips are pushed ahead of the cut. The tap is manufactured from Vanadium High Speed Steel (HSS-E) and finished with a steam oxide coating that provides light lubricity and corrosion resistance during use. It carries a Class 2B thread tolerance and an H7 thread limit, producing threads that meet standard fastener fit requirements. Machinists and tool and die professionals install this tap in CNC machining centers, drill presses, and hand-tapping fixtures.

The OSG 1727601 is intended for tapping through holes in hardened steel, low-carbon steel, medium-carbon steel, and stainless steel. It is a general-purpose production tap appropriate for residential and commercial fabrication shops, maintenance and repair operations, and light manufacturing environments. The plug chamfer provides 3 to 5 threads of lead-in, making thread starting straightforward in guided setups. The Series 300 classification places it within OSG standard machine screw tap offerings.

Key Features

• 8-32 UNC thread form with Class 2B fit and H7 thread limit for standard fastener compatibility
• Plug chamfer with 3 flutes optimized for through-hole tapping and forward chip ejection
• Vanadium High Speed Steel (HSS-E) construction for improved wear resistance in steel materials
• Steam oxide coating provides mild lubricity and reduces galling during threading operations
• Right-hand thread direction compatible with standard machine tapping setups
• No coolant-through design — suitable for external flood coolant or cutting oil application

Compatibility

Designed for tapping 8-32 UNC through holes in hardened steel, low-carbon steel, medium-carbon steel, and stainless steel. Suitable for use in standard machine tapping chucks and hand-tap wrenches that accept the corresponding shank diameter.

Installation Notes

This tap should be installed by a qualified machinist or tooling professional. Ensure the workpiece is securely fixtured and the tap is properly aligned with the drilled pilot hole before beginning the threading cycle. Apply an appropriate cutting oil or tapping fluid to the work area before and during use to reduce tool wear and improve thread finish. Inspect the tap for chipping or wear before each use and replace if damage is observed.