Osg 1731808 Spiral Point Tap 3/4-10 Unc Ticn Hss

Product Description

The OSG 1731808 is a spiral point plug tap designed for threading 3/4-10 UNC through holes in a wide range of ferrous materials. Built from vanadium high speed steel (HSS-E) and finished with a titanium carbonitride (TiCN) coating, this tap delivers extended tool life and improved wear resistance in demanding production environments. It features 3 flutes, a right-hand thread direction, and an H3 thread limit for consistent tolerance control. The plug chamfer provides a gradual cutting lead that works efficiently in through-hole tapping applications. With an overall length of 4.252 inches and a thread length of 1.251 inches, this tap fits standard tap holders used in CNC machining centers, drill presses, and manual tapping setups.

This tap is suited for threading through holes in hardened steel, low-carbon steel, medium-carbon steel, and stainless steel. It is used in industrial manufacturing, job shop machining, and maintenance repair operations where 3/4-10 UNC threads are required. The TiCN coating helps reduce heat buildup and friction during cutting, making it a practical choice for higher-volume tapping cycles where tool longevity matters. The Series 300 designation places it within a well-established production tap line commonly found in machine shops and toolrooms.

Key Features

• 3/4-10 UNC thread form with H3 thread limit for controlled tolerance fit
• Vanadium high speed steel (HSS-E) construction for toughness in ferrous materials
• TiCN coating reduces friction and extends tool life versus uncoated taps
• Plug chamfer provides gradual cutting action suited to through-hole applications
• 3-flute spiral point design pushes chips forward ahead of the tap
• Right-hand thread direction, compatible with standard tapping attachments and CNC rigid tapping

Compatibility

Designed as an OEM-style production tap for through-hole tapping operations requiring a 3/4-10 UNC right-hand thread in hardened steel, low-carbon steel, medium-carbon steel, and stainless steel workpieces.

Installation Notes

This tap is installed by machinists and tool and die professionals using standard 3/4-inch tap holders, tapping chucks, or CNC rigid tapping programs. Ensure the machine spindle is fully stopped and the workpiece is securely fixtured before changing or inspecting the tap. Use an appropriate cutting fluid or tapping compound for the workpiece material to reduce heat and improve thread quality. Do not exceed the tap's designed feed rate or force the tap through a blind hole, as this tap is configured for through-hole use.