Osg 1220002 Spiral Point Tap 1/4-20 Unc Hss

Product Description

The OSG 1220002 is a spiral point plug tap designed for threading 1/4-20 UNC holes in a wide range of metals. Manufactured from high-speed steel with an elektraLUBE coating, this tap is built for production and maintenance threading where consistent thread quality matters. The spiral point geometry pushes chips forward ahead of the cutting zone, making it well suited for through-hole applications. The H1 thread limit keeps tolerances tight for standard UNC fit classes. With 2 flutes and a 1-inch thread length, this tap handles typical fastener-depth threads without excessive tool length.

This tap is used in machine shops, maintenance facilities, and manufacturing environments where 1/4-20 UNC threads are common. It is rated for use in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel, covering most materials encountered in general metalworking and fabrication. It is compatible with standard tap handles, drill press setups, and CNC tapping cycles using right-hand rotation.

Key Features

• Spiral point design pushes chips forward, ideal for through-hole threading
• elektraLUBE coating reduces friction and extends tool life across varied materials
• H1 thread limit for tight UNC tolerance control
• High-speed steel construction provides durability in production tapping
• Right-hand thread direction, compatible with standard tapping equipment
• Rated for aluminum, cast iron, low- to high-carbon steel, and hardened steel

Compatibility

Designed for threading 1/4-20 UNC through-holes in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel using standard right-hand tapping equipment.

Installation Notes

This tap should be installed by a machinist or maintenance technician familiar with threading operations. Ensure the workpiece is securely fixtured and the correct tap drill size for 1/4-20 UNC is used before tapping. Apply cutting fluid appropriate for the workpiece material to protect the tap and improve thread finish. Do not reverse a broken tap with force; use proper tap extraction procedures to avoid damaging the workpiece.