Osg 1728001 Spiral Point Tap 10-32 Unf 3 Flute Plug Hss

Product Description

The OSG 1728001 is a spiral point plug tap designed for cutting right-hand internal threads to the 10-32 UNF standard. Built from vanadium high speed steel (HSS-E) with a steam oxide coating, it offers improved lubricity and corrosion resistance during tapping operations. The plug chamfer distributes cutting load across the leading threads, making it well suited for through-hole applications. With 3 flutes and an H6 thread limit, this tap holds close tolerances required in precision threaded assemblies. Overall length is 2.374 inches with a shank diameter of 0.194 inches and a thread length of 0.5 inches.

This tap is intended for use in through-hole threading applications on a range of ferrous materials including low-carbon steel, medium-carbon steel, hardened steel, and stainless steel. It fits standard drill press, CNC machining center, and hand-tapping workflows. The 10-32 UNF thread size is common in instrument panels, electrical enclosures, and light mechanical assemblies where fine-thread engagement is required in thin or hard materials. It is used by machinists, maintenance technicians, electricians, and field service professionals.

Key Features

• 10-32 UNF right-hand thread form with H6 thread limit for close-tolerance fits
• Vanadium high speed steel (HSS-E) construction for improved wear resistance over standard M2 HSS
• Steam oxide coating reduces friction and improves chip flow during cutting
• Plug chamfer optimized for through-hole tapping with gradual thread engagement
• 3-flute geometry evacuates chips forward, keeping the cutting zone clear
• No coolant-through requirement — compatible with standard tapping fluid or cutting oil

Compatibility

Designed for through-hole tapping in low-carbon steel, medium-carbon steel, hardened steel, and stainless steel. Part of OSG Series 300.

Installation Notes

Install in a tap holder, tapping head, or drill chuck rated for the shank diameter before use. Ensure the workpiece is securely fixtured and the pilot hole diameter matches the recommended tap drill size for 10-32 UNF. Apply cutting oil or tapping fluid to the tap before and during the operation to extend tool life and improve thread finish. Do not reverse the tap under power without confirming the tapping head or CNC program is configured for proper back-out.