Osg 1741805 Spiral Point Tap 3/4-10 Unc Tin Coated Hss

Product Description

The OSG 1741805 is a spiral point plug tap designed for threading 3/4-10 UNC holes in a wide range of ferrous and non-ferrous materials. Manufactured from Vanadium High Speed Steel (HSS-E) with a titanium nitride (TiN) coating, this tap delivers extended tool life and reduced cutting friction compared to uncoated alternatives. The 3-flute, right-hand spiral point geometry pushes chips forward ahead of the cutting zone, making it well suited for through-hole tapping applications. With an H3 thread limit, this tap produces consistent Class 2B or 3B thread fits in production and maintenance environments.

This tap is intended for use in through-hole applications across a broad range of materials including aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, and cast iron. It is commonly used in machine shops, manufacturing facilities, and maintenance operations where 3/4-10 UNC threaded fastener installations are required. The TiN coating makes it a capable choice for harder or abrasive materials where tool wear is a concern. The plug chamfer style requires a started hole and is not suited for blind holes where a bottoming tap is needed.

Key Features

• 3/4-10 UNC thread size with right-hand cutting direction
• Spiral point geometry pushes chips forward for efficient through-hole tapping
• TiN coating reduces friction and extends tool life in demanding materials
• Vanadium High Speed Steel (HSS-E) construction for toughness and wear resistance
• H3 thread limit for consistent Class 2B or 3B thread production
• 3-flute plug chamfer design for general-purpose machine or hand tapping

Compatibility

Compatible with materials including aluminum, hardened steel, stainless steel, high-carbon steel, low-carbon steel, medium-carbon steel, alloy steel, die steel, and cast iron. Designed for use in standard 3/4-10 UNC through-hole tapping operations where an H3 thread limit is specified.

Installation Notes

This tap is installed by machinists and tooling professionals using standard tapping machines, CNC machining centers, or hand tapping equipment. Before use, ensure the workpiece is securely clamped and the pilot hole diameter matches the recommended tap drill size for 3/4-10 UNC. Apply cutting fluid appropriate to the workpiece material to reduce heat and extend tap life. Do not reverse-run a spiral point tap in a blind hole, as chip packing can cause tap breakage.