Osg 2532401 Spiral Point Tap 1/2-13 Unc 3 Flute Plug

Product Description

The OSG 2532401 is a spiral point tap designed for threading 1/2-13 UNC holes in a wide range of ferrous and non-ferrous materials. Manufactured from vanadium high speed steel with a steam oxide coating, this tap offers improved lubricity and corrosion resistance during cutting. It features a plug chamfer for use in through-hole applications, a 3-flute design that pushes chips ahead of the cutting action, and conforms to a 2B class of fit with an H2 thread limit. Installed by machinists and maintenance trades in production and repair environments, it is suited for hand tapping, drill press, and CNC tapping operations.

The OSG 2532401 is appropriate for through-hole tapping applications in aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, and hardened steel. The plug chamfer makes it the standard choice when the tap can pass completely through the workpiece. It is commonly used in general machining, fabrication shops, and field maintenance where 1/2-13 UNC threaded fastener holes are required.

Key Features

• Spiral point design pushes chips forward, keeping flutes clear in through-hole tapping
• Vanadium high speed steel construction provides wear resistance across a broad range of workpiece materials
• Steam oxide coating improves lubricity and reduces galling during cutting
• Plug chamfer — optimized for through-hole applications
• H2 thread limit and 2B class of fit for standard UNC tolerance requirements
• Right-hand cut, 3-flute configuration; no coolant-through required

Compatibility

Designed for threading 1/2-13 UNC through-holes in aluminum, hardened steel, stainless steel, high-carbon steel, low-carbon steel, medium-carbon steel, alloy steel, die steel, and cast iron. Fits standard 1/2-13 UNC tapping applications requiring a 2B class of fit.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians using a tap wrench, drill press, or CNC tapping head. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill size for 1/2-13 UNC before tapping. Apply an appropriate cutting fluid or tapping compound for the workpiece material to extend tool life and improve thread quality. Do not force the tap if resistance increases sharply — back off to break chips before continuing.