Osg 1200200 Spiral Point Tap 1-64 Unc Plug Hss

Product Description

The OSG 1200200 is a spiral point tap designed for cutting internal threads in a wide range of ferrous and non-ferrous materials. It features a 1-64 UNC thread form with a plug chamfer, 2 flutes, and a right-hand thread direction. Manufactured from high-speed steel with a bright finish, this tap carries an H1 thread limit and a 3B class of fit, making it suited for standard tolerance threading applications. Overall length is 1.688 inches with a thread length of 0.37 inches (3/8 inches) and a shank diameter of 0.141 inches. It is part of OSG Series 105 and is sold individually.

This tap is appropriate for threading operations in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. The spiral point design pushes chips forward ahead of the tap, keeping the flutes clear during through-hole tapping operations. It is commonly used in production machining, maintenance, and repair environments where consistent 1-64 UNC threads are required at small fastener sizes.

Key Features

• 1-64 UNC thread form with right-hand thread direction
• Plug chamfer for general-purpose through-hole tapping
• H1 thread limit with 3B class of fit for standard tolerance requirements
• High-speed steel construction for durability across a broad material range
• Spiral point geometry pushes chips forward, reducing chip packing in through-hole applications
• Bright finish with no coolant-through feature; suitable for use with external cutting fluids

Compatibility

Designed for cutting 1-64 UNC internal threads in aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces where a 3B class of fit is required.

Installation Notes

This tap is intended for use by machinists and maintenance technicians operating drill presses, CNC machining centers, tapping machines, or hand-tapping setups. Ensure the workpiece is securely fixtured and that an appropriate cutting fluid or tapping compound is applied before and during the operation. For power tapping, verify that the machine spindle speed and feed rate are appropriate for the workpiece material and tap size. Inspect the tap for wear or damage before each use and replace if chipping or dull cutting edges are observed.