Osg 1982101 Spiral Point Tap M2.5x0.45 Metric Coarse

Product Description

The OSG 1982101 is a spiral point plug tap designed for cutting right-hand internal threads to the M2.5x0.45 Metric Coarse standard. Built from high-speed steel with a steam oxide coating, it drives chips forward ahead of the cut, making it well-suited for through-hole tapping operations. The 6H class of fit delivers standard tolerance threads appropriate for most fastener and assembly applications. With 2 flutes and a D3 thread limit, it maintains consistent thread geometry across a range of ferrous and non-ferrous workpiece materials. Overall length is 46 millimeters with a thread length of 12.8 millimeters (approximately 0.5 inches).

This tap is used in machine shop, manufacturing, and maintenance environments where M2.5x0.45 threads are required in through-hole configurations. It is rated for use in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. The small shank diameter of 3.5814 millimeters (0.1410 inches) is sized for CNC tap holders, tapping heads, and drill presses equipped for this metric range. Series 142 denotes OSG production standards for this tap geometry and coating specification.

Key Features

• Spiral point geometry pushes chips forward for efficient through-hole tapping
• Steam oxide coating reduces friction and improves lubrication retention
• High-speed steel construction handles a broad range of workpiece materials including hardened steel
• 6H class of fit for standard metric thread tolerance
• D3 thread limit for controlled oversize within tolerance range
• Right-hand thread direction, no coolant-through requirement

Compatibility

Designed for through-hole tapping of M2.5x0.45 Metric Coarse threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel workpieces.

Installation Notes

Installation and use of this tap is performed by machinists, tool-and-die technicians, and maintenance mechanics. Secure the tap in an appropriate tap holder sized for the 3.5814-millimeter shank before operation. Apply cutting fluid or tapping compound appropriate to the workpiece material to extend tool life and improve thread quality. Ensure the workpiece is fixtured rigidly and the tap is aligned perpendicular to the hole axis before engaging the cut.