Osg 2533601 Spiral Point Tap 3/4-10 Unc Plug Hss

Product Description

The OSG 2533601 is a spiral point plug tap designed for cutting 3/4-10 UNC right-hand internal threads in a wide range of ferrous and non-ferrous workpiece materials. Built from Vanadium High Speed Steel (HSS-E) with a steam oxide coating, this tap offers improved lubricity and corrosion resistance during threading operations. The plug chamfer distributes cutting load across the first few threads, making it well suited for through-hole tapping. With a 3-flute geometry and spiral point design, chips are pushed forward ahead of the cutting edge rather than packing in the flute, reducing the risk of tap breakage in production environments. Overall length is 4.921 inches with a thread length of 1.21 inches.

This tap is used in machine shop, maintenance, and manufacturing environments for tapping through holes in aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, and hardened steel. It is appropriate for CNC machining centers, drill presses, and tapping machines where through-hole threading at 3/4-10 UNC is required. The H2 thread limit designation indicates a tight tolerance class suitable for 2B class of fit threads. Licensed machinists and tool-and-die technicians are the primary users of this tap in both job shop and production settings.

Key Features

• Spiral point geometry pushes chips forward, keeping flutes clear during through-hole tapping
• Vanadium HSS-E construction provides increased wear resistance and toughness over standard M2 HSS
• Steam oxide coating improves lubricity and reduces built-up edge on the cutting faces
• Plug chamfer distributes cutting forces across multiple threads for smooth entry
• H2 thread limit holds tight tolerances for 2B class of fit applications
• Right-hand cut, no coolant-through requirement — compatible with flood, mist, or paste lubricant

Compatibility

Designed for through-hole tapping at 3/4-10 UNC in aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, and hardened steel. Conforms to the OSG Series 250 product line specifications.

Installation Notes

This tap should be installed by a qualified machinist or tooling technician using an appropriate tap holder, tapping chuck, or CNC tool holder rated for the shank diameter. Ensure the workpiece is securely fixtured and the spindle is properly aligned before beginning the threading operation. Apply a suitable cutting fluid or tapping compound for the workpiece material to extend tap life and improve thread finish. Inspect the tap for chips or wear before each use and replace if cutting edges show visible damage.