Osg 3190200 Straight Flute Tap 8-32 Unc Bottoming Carbide

Product Description

The OSG 3190200 is a solid carbide straight flute tap designed for cutting 8-32 UNC internal threads in production and maintenance machining applications. It features a bottoming chamfer, allowing threads to be cut close to the bottom of blind holes. With 3 flutes and a 2B class of fit, this tap produces accurate, consistent threads suited to standard fastener assemblies. The overall length is 2.48 inches (63 mm), the thread length is 0.374 inches, and the shank diameter is 0.168 inches. Solid carbide construction provides the rigidity and wear resistance needed when tapping abrasive or hard materials.

This tap is rated for use in aluminum, cast aluminum, and cast iron. The bottoming chamfer makes it the right choice when thread depth must reach near the base of a blind hole, a common requirement in fixture work, automotive components, and precision assemblies. The bright, uncoated finish suits general-purpose tapping where coating chemistry is not a factor. It is part of OSG Series 319 and is sized for machine tapping on CNC machining centers, drill presses, or tapping arms where right-hand, 32 threads-per-inch work is required.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• Solid carbide construction for rigidity and extended tool life in abrasive materials
• 2B class of fit for standard UNC fastener thread tolerance
• 3 straight flutes for chip clearance in through and blind hole applications
• Right-hand thread direction, 32 TPI, 8-32 UNC standard
• Bright, uncoated finish — no coating chemistry concerns for sensitive applications

Compatibility

Rated for use in aluminum, cast aluminum, and cast iron workpiece materials. Part of OSG Series 319, designed for machine tapping applications requiring 8-32 UNC right-hand internal threads with a 2B class of fit.

Installation Notes

Install in a machine tapping chuck, rigid tapping holder, or floating tap holder rated for the spindle type in use. Power down and secure the workpiece before tool changes. Use appropriate cutting fluid for the workpiece material — sulfo-chlorinated oil is common for cast iron, while light oil or emulsion is typical for aluminum. Do not exceed the tap's designed chip load; bottoming taps require chip clearance management in blind holes to avoid breakage.