Osg 1651500808 Spiral Point Tap 8-32 Unc Ticn Coated

Product Description

The OSG 1651500808 is a high-performance spiral point tap designed for cutting 8-32 UNC internal threads in a wide range of ferrous and non-ferrous materials. Built from powdered metal (PMT15 grade) and finished with a TiCN coating, this tap delivers improved wear resistance and tool life over standard HSS taps. The 3-flute, plug chamfer geometry pushes chips forward ahead of the cutting zone, making it well suited for through-hole applications. With a 2B class of fit and H3 thread limit, it produces threads to standard tolerance for typical fastener and assembly applications. Overall length is 2.48 inches with a 0.374-inch thread length.

This tap is used in production and maintenance machining environments where 8-32 UNC threads are required in through-hole configurations. The TiCN coating and powdered metal substrate make it a strong choice for harder work materials including alloy steel, stainless steel, high-carbon steel, hardened steel, die steel, cast iron, and aluminum alloys. It is appropriate for use in manual tapping, CNC machining centers, and drill-tap operations where chip evacuation through the hole is achievable.

Key Features

• TiCN coating improves hardness and lubricity for extended tool life in abrasive materials
• Powdered metal (PMT15) construction offers greater toughness and wear resistance than conventional HSS
• Spiral point geometry pushes chips forward, optimized for through-hole tapping
• 3-flute design balances chip room with core strength at the 8-32 thread size
• H3 thread limit and 2B class of fit meet standard tolerance requirements for general fastener applications
• Right-hand thread direction; no coolant-through feature required for most applications

Compatibility

Designed for cutting 8-32 UNC through-hole threads in alloy steel, aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, medium-carbon steel, stainless steel, and die steel. Part of OSG Series 16515.

Installation Notes

This tap should be installed and operated by a qualified machinist familiar with tapping feeds, speeds, and cutting fluid requirements for the target material. Ensure the workpiece is securely fixtured and the correct tap drill size for 8-32 UNC is used before tapping. Apply appropriate cutting fluid for the work material, particularly when tapping stainless or hardened steels. Do not reverse the tap under load without adequate lubrication, and avoid forcing the tap if resistance increases unexpectedly.