Osg 2813901 Spiral Point Tap 10-32 Unf 3 Flute

Product Description

The OSG 2813901 is a spiral point plug tap designed for cutting right-hand internal threads to the 10-32 UNF standard. Built from vanadium high-speed steel (HSS-E) with a steam oxide coating, this tap is suited for production tapping in both hand and machine applications. The spiral point geometry pushes chips forward ahead of the cutting zone, making it effective in through-hole applications where chip evacuation is critical. With a thread limit of H4 and a Class 2B fit, it produces threads within tight tolerance for reliable fastener engagement in precision assemblies.

The OSG 2813901 is used across a broad range of materials including aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, and cast iron. It is a practical choice for HVAC equipment assembly, electrical enclosure fabrication, and general mechanical work where 10-32 UNF threaded holes are required in through-hole configurations. The plug chamfer makes it appropriate for starting threads from the top of a through-hole without a starter tap.

Key Features

• Spiral point design pushes chips forward for clean through-hole tapping
• Vanadium high-speed steel (HSS-E) construction for extended tool life in a wide range of materials
• Steam oxide coating reduces friction and improves lubrication retention during cutting
• H4 thread limit with Class 2B fit for precise tolerance control
• 3-flute configuration balances chip clearance and cutting edge strength
• Right-hand thread direction compatible with standard tapping setups and tap handles

Compatibility

Designed for tapping 10-32 UNF through-holes in aluminum, hardened steel, stainless steel, high-carbon steel, low-carbon steel, medium-carbon steel, alloy steel, die steel, and cast iron. Not rated for coolant-through use.

Installation Notes

Use in a properly aligned tap handle or machine tapping setup to avoid tap breakage from angular misalignment. Apply cutting fluid appropriate to the workpiece material before and during tapping. Ensure the pilot hole is drilled to the correct diameter for 10-32 UNF before tapping. Follow standard shop safety practices and secure the workpiece firmly before beginning the operation.