Osg 2003102 Spiral Point Tap 4-40 Unc Hss Elektralube

Product Description

The OSG 2003102 is a spiral point tap designed for cutting internal 4-40 UNC threads in a wide range of ferrous and non-ferrous metals. The spiral point geometry pushes chips forward ahead of the cutting zone, which reduces chip packing in through-hole tapping applications. Built from high-speed steel (HSS) for durability and heat resistance, the tap features a plug chamfer for general-purpose threading and carries an elektraLUBE coating that lowers friction and extends tool life across high-volume production runs. With 2 flutes and an H7 thread limit, this tap is suited for applications requiring close tolerance fits and consistent thread form.

This tap is intended for through-hole tapping in materials including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. The 4-40 UNC thread form is common in precision instrument work, electronics enclosures, and light mechanical assemblies. The plug chamfer makes it adaptable as a starting tap in most standard production setups. It is used primarily by machinists and maintenance professionals in both shop and field environments.

Key Features

• Spiral point design pushes chips forward for clean through-hole tapping
• elektraLUBE coating reduces friction and extends tool life
• H7 thread limit supports close-tolerance thread fits
• High-speed steel construction resists heat and wear across a wide material range
• Plug chamfer suitable for general-purpose and production tapping
• Right-hand thread direction for standard tapping operations

Compatibility

Designed for through-hole tapping of 4-40 UNC threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. Part of OSG Series 105.

Installation Notes

This tap is installed and operated by machinists using a tap wrench, tapping head, or CNC spindle. Always secure the workpiece and ensure proper alignment before beginning the tapping cycle. Power down or de-energize any machine tool before changing or setting tooling. Use appropriate cutting fluid or lubricant for the workpiece material even when the elektraLUBE coating is present, particularly in harder steels.