Cleveland C58439 Spiral Flute Tap 10-32 Unc Bottoming Hss

Product Description

The CLEVELAND C58439 is a 10-32 UNC spiral flute tap designed for bottoming applications in blind holes. Built from high speed steel with an oxide finish, this tap cuts right-hand threads to a 2B class of fit with a Thread Limit of H3. The 52-degree helix angle and fast flute style help evacuate chips efficiently during the threading operation. At 2.375 inches overall length with a 0.5-inch thread length, this tap is sized for compact fastener applications common in light fabrication, maintenance, and equipment assembly work. Licensed trade professionals and skilled machinists install this tap using standard tapping equipment.

This tap is rated for use in aluminum, non-ferrous metals, and steel. The bottoming chamfer allows threading to the bottom of a blind hole, making it the appropriate choice when full thread depth is required close to the base of a drilled hole. The 3-flute spiral design supports use in materials that produce short, manageable chips. It is well suited for production threading and field repair work requiring consistent thread quality in 10-32 fastener applications.

Key Features

• Bottoming chamfer for full thread depth in blind holes
• 52-degree helix angle with fast flute style for efficient chip evacuation
• High speed steel construction for durability across steel and non-ferrous materials
• Oxide finish for surface protection and reduced friction during cutting
• 2B class of fit with H3 thread limit for consistent, standard-tolerance threads
• Right-hand flute and right-hand thread orientation

Compatibility

Designed for blind hole threading in 10-32 UNC applications in aluminum, non-ferrous metals, and steel. Suitable for use with standard tapping heads and holders that accept a 0.194-inch shank diameter.

Installation Notes

This tap should be installed and operated by machinists or trade professionals familiar with tapping procedures and tooling standards. Ensure the workpiece is securely clamped and the drilled hole is the correct tap drill diameter before beginning. Use appropriate cutting fluid for the material being tapped, and back off periodically to break chips when working in deeper blind holes. Do not force the tap against the bottom of the hole without confirming sufficient chip clearance.