Osg 1651500908 Spiral Point Tap 8-32 Unc Ticn

Product Description

The OSG 1651500908 is a spiral point tap designed for threading 8-32 UNC holes in production and job-shop environments. Built from powdered metal (grade PMT15) and finished with a TiCN coating, this plug-chamfer tap is engineered for longer tool life and reduced friction compared to standard HSS taps. It runs right-hand, cuts a 3B class of fit, and holds an H2 thread limit for consistent tolerance control. The 3-flute spiral point pushes chips forward ahead of the cutting zone, making it well suited for through-hole applications where chip evacuation is critical.

This tap is intended for use in a wide range of ferrous and non-ferrous materials including low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, hardened steel, die steel, cast iron, stainless steel, aluminum, and cast aluminum. It is appropriate for CNC tapping centers, drill presses, and hand-tapping operations where 8-32 UNC internal threads are required. The plug chamfer (3-5 thread lead) makes it a standard choice for through-hole threading in production runs.

Key Features

• TiCN coating reduces friction and extends tool life in abrasive and hard materials
• Powdered metal (PMT15) substrate provides superior wear resistance over standard M2 HSS
• Spiral point geometry pushes chips forward - optimized for through-hole tapping
• H2 thread limit maintains tight tolerance control for 3B class of fit threads
• Right-hand cut, plug chamfer - compatible with standard CNC and manual tapping setups
• No coolant-through requirement - compatible with flood, mist, or tap-magic lubrication

Compatibility

Designed for threading 8-32 UNC through holes in alloy steel, aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, medium-carbon steel, stainless steel, and die steel applications.

Installation Notes

This tap should be installed by a machinist or tool-and-die professional familiar with threading operations and proper speeds and feeds for the workpiece material. Always ensure the spindle is stopped and the machine is powered down before changing tooling. Use appropriate tapping fluid or cutting oil matched to the workpiece material to prevent galling, especially in stainless steel and hardened steel. Follow the machine manufacturer and tap manufacturer guidelines for RPM and feed rate - do not force the tap if resistance increases unexpectedly, as breakage in a workpiece bore is difficult to recover.