Cleveland C58434 Spiral Flute Tap 8-32 Unc Hss Plug

Product Description

The CLEVELAND C58434 is a spiral flute tap designed for blind hole threading in a range of materials including aluminum, non-ferrous metals, and steel. It cuts an 8-32 UNC thread with a right-hand flute and right-hand thread orientation. The plug chamfer style provides a gradual entry that is well-suited for through-holes and moderately deep blind holes. Built from high speed steel with an oxide finish, this tap carries an H3 thread limit and meets a 2B class of fit. It is used by machinists, maintenance technicians, and tool-and-die tradespeople wherever accurate metric-free inch-standard threads are required in production or repair work.

The C58434 is applied in blind hole threading operations on aluminum, non-ferrous metal, and steel workpieces. The 52-degree helix angle promotes chip ejection up and out of the hole, which is the key advantage of a spiral flute design in blind applications. With an overall length of 2.125 inches and a 0.38-inch thread length, it fits standard tap handles and machine tap holders used in manual or CNC-assisted tapping. This tap is a single-unit item with a minimum order quantity of one.

Key Features

• 52-degree helix angle evacuates chips efficiently from blind holes
• High speed steel construction provides hardness and wear resistance across steel and non-ferrous materials
• Oxide finish reduces friction and provides mild corrosion resistance during storage and use
• H3 thread limit with 2B class of fit ensures dimensional accuracy for standard inch fastener threads
• Plug chamfer style distributes cutting load across several leading threads for controlled entry
• Right-hand flute and right-hand thread orientation — standard for conventional tapping direction

Compatibility

Designed for use in standard tap handles, T-handle wrenches, and machine tap holders that accept a 0.168-inch shank diameter. Suitable for threading 8-32 UNC blind holes in aluminum, non-ferrous metals, and steel workpieces per Series 1093BO specifications.

Installation Notes

This tap is installed by a machinist or maintenance technician using a tap handle or machine tapping attachment. Always secure the workpiece before tapping and ensure the pilot hole diameter matches the recommended tap drill size for 8-32 UNC threads. Use appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Do not reverse-cycle the tap to break chips — the spiral flute design moves chips out continuously during forward cutting.