Osg 1305710108 Spiral Flute Tap 2-56 Unc Ticn Coated

Product Description

The OSG 1305710108 is a spiral flute tap designed for cutting 2-56 UNC internal threads in demanding materials. Manufactured from powdered metal and finished with a TICN coating, it delivers extended tool life in applications involving alloy steel, stainless steel, hardened steel, titanium, and high-nickel alloys. The modified bottoming chamfer allows threading closer to the bottom of a blind hole, while the 3-flute spiral design evacuates chips up and out of the hole during the cut. Overall length is 1.75 inches. This tap is used by machinists and precision tooling technicians working on small-diameter fastener applications in tight-tolerance components.

This tap is suited for production and maintenance machining environments where 2-56 UNC threads are required in hard or abrasion-resistant materials. The right-hand flute direction and 10-degree helix angle make it effective in both CNC tapping cycles and manual tapping operations on #2-sized clearance holes. The 2B class of fit is the standard commercial tolerance for most UNC threaded assemblies. Typical applications include electronics enclosures, instrument housings, and precision mechanical assemblies where small-diameter threads must be cut cleanly and consistently.

Key Features

• TICN coating for extended wear resistance in hard and abrasive materials
• Modified bottoming chamfer allows threading close to blind hole floors
• 3-flute spiral design promotes upward chip evacuation during cutting
• Powdered metal construction for improved hardness and toughness over standard HSS
• H2 thread limit for consistent 2B class of fit tolerances
• Right-hand thread and right-hand flute direction; compatible with standard tapping attachments

Compatibility

Designed for cutting 2-56 UNC threads in alloy steel, stainless steel, hardened steel, titanium, and high-nickel alloy workpieces. Part of OSG Series 313TI. No coolant-through feature; suited for external coolant or cutting fluid application.

Installation Notes

Installation should be performed by a qualified machinist using a properly sized tap wrench, tapping head, or CNC rigid tapping cycle. Always ensure the spindle is stopped and the workpiece is fully secured before engaging the tap. Use an appropriate cutting fluid or tapping compound for the workpiece material to reduce heat and extend tool life. Follow ANSI and shop-standard procedures for tap alignment to avoid tap breakage in small-diameter applications.