Osg 2988500 Spiral Flute Tap M10x1.50 Bottoming 6H Hss

Product Description

The OSG 2988500 is a spiral flute tap designed for cutting M10x1.50 metric coarse internal threads in bottoming applications. It features a 50-degree helix angle and three right-hand spiral flutes that evacuate chips upward out of the hole, making it well-suited for blind-hole tapping where chip clearance is critical. The tool is manufactured from high-speed steel with a bright, uncoated finish and conforms to a 6H class of fit for standard metric thread tolerance. Overall length is 2-15/16 inches with a shank diameter of 0.3810 inches. This tap is used by machinists, tool-and-die workers, and maintenance technicians working with metric fastener applications.

The OSG 2988500 is designed for tapping aluminum and carbon steel workpieces in blind-hole configurations where thread depth is maximized near the bottom of the bore. The bottoming chamfer geometry minimizes the unthreaded portion at the bottom of the hole, making it the appropriate choice when full thread engagement at depth is required. It is suited for manual tapping operations as well as machine tapping setups where right-hand thread cutting is specified.

Key Features

• M10x1.50 metric coarse thread form with 6H class of fit tolerance
• Bottoming chamfer style for maximum thread depth in blind holes
• 50-degree helix angle with three right-hand spiral flutes for efficient chip evacuation
• High-speed steel construction for durability across aluminum and carbon steel applications
• Bright, uncoated finish with overall length of 2-15/16 inches
• Right-hand thread direction; no coolant-through feature

Compatibility

Designed for tapping M10x1.50 metric coarse blind holes in aluminum and carbon steel workpieces. Compatible with standard tap handles and machine tap holders sized for a 0.3810-inch shank diameter.

Installation Notes

This tap should be installed by qualified machinists or maintenance technicians familiar with metric tapping procedures. Ensure the workpiece is securely fixtured and the tap is properly aligned before beginning the cut to prevent tap breakage. Apply appropriate cutting fluid for the workpiece material before tapping. When machine tapping, verify spindle speed and feed rate are appropriate for the material and tap geometry before engaging the cut.