Osg 1733408 Spiral Flute Tap 1/2-13 Unc Ticn Vanadium Hss

Product Description

The OSG 1733408 is a spiral flute tap designed for threading 1/2-13 UNC holes in ferrous materials. It is manufactured from vanadium high-speed steel and features a titanium carbonitride (TiCN) coating that improves wear resistance and reduces galling in demanding applications. The modified bottoming chamfer allows threading closer to the bottom of a blind hole than a standard taper or plug tap. With a 45-degree helix angle and three right-hand flutes, this tap efficiently evacuates chips upward out of the hole, making it well suited for short-chipping and interrupted-cut materials. It carries an H3 thread limit and a 3B class of fit for standard tolerance threading.

This tap is intended for use in stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel. It is a production-grade tool used by machinists and tool-and-die professionals in CNC tapping, manual tapping heads, and turret lathe applications. The modified bottoming geometry makes it a practical choice for blind-hole work where thread depth close to the bottom is required. The TiCN coating extends tool life in abrasive and work-hardening materials such as stainless steel. Coolant-through capability is not included in this tool.

Key Features

• 1/2-13 UNC thread form with H3 thread limit and 3B class of fit for standard tolerance applications
• 45-degree right-hand spiral flutes evacuate chips upward, reducing re-cutting in blind holes
• Modified bottoming chamfer allows threading nearer to hole bottom than plug or taper configurations
• TiCN coating improves surface hardness and wear resistance in stainless and carbon steel
• Vanadium high-speed steel construction provides toughness for interrupted cuts and tough alloys
• Part of the OSG EXOTAP VA3 series, engineered for high-performance tapping in ferrous materials

Compatibility

Designed for threading 1/2-13 UNC holes in stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel. Fits standard 1/2-inch tap holders and collet chucks sized for a 0.367-inch shank diameter.

Installation Notes

This tap should be installed by a qualified machinist using a properly sized tap holder or collet chuck. Ensure the workpiece is securely fixtured and the spindle is aligned to the hole axis before engaging the tap to prevent breakage. Use a cutting fluid or tapping compound appropriate for the workpiece material, particularly when tapping stainless steel. Inspect the tap for wear or chipping before each use and replace at the first sign of degradation to avoid thread damage in the workpiece.