Osg 1005112208 Straight Flute Tap 3/8-16 Unc Ticn

Product Description

The OSG 1005112208 is a straight flute machine tap designed for threading 3/8-16 UNC internal threads in hardened steel and alloy steel. Built from powdered metal and coated with TiCN, it delivers extended tool life in abrasive and hard-material applications where high-speed steel taps wear prematurely. The modified bottoming chamfer allows threading close to the bottom of blind holes, making it well suited for tight-tolerance production work. With 5 flutes, a 2B class of fit, and an H5 thread limit, this tap produces consistent, dimensionally accurate threads that meet standard fastener assembly requirements.

This tap is intended for machine use in CNC machining centers, drill presses, and tapping machines. It is a strong fit for shops working with hardened steel components, alloy steel parts, and similar ferrous materials in both production and job-shop environments. The right-hand thread configuration and straight flute geometry make it appropriate for through-hole and shallow blind-hole applications where chip evacuation is managed by the setup. Machinists and tooling specialists working with close-tolerance assemblies will find the 2B class and H5 limit appropriate for general-purpose threaded fastener interfaces.

Key Features

• 3/8-16 UNC thread form with 2B class of fit and H5 thread limit for consistent, in-spec threads
• Modified bottoming chamfer for threading near the base of blind holes
• Powdered metal construction provides greater wear resistance than standard HSS
• TiCN coating reduces friction and extends tool life in hardened and alloy steel
• 5-flute design increases thread contact and improves finish quality
• Right-hand thread direction; no coolant-through feature

Compatibility

Designed for threading 3/8-16 UNC holes in hardened steel and alloy steel workpieces. Rated for machine tapping applications; not intended for hand tapping.

Installation Notes

Installation should be performed by a qualified machinist using a CNC machine, tapping machine, or rigid drill press with a tapping attachment. Ensure the spindle is fully stopped and the machine is in a safe state before changing or inspecting the tap. Use appropriate cutting fluid or tapping compound rated for hardened and alloy steel to protect the coating and maintain tool life. Verify hole diameter and depth before tapping to avoid tap breakage in blind holes.