Cleveland C54233 Hand Tap 6-40 Unf Plug Hss 3-flute

Product Description

The CLEVELAND C54233 is a 6-40 UNF straight-flute hand tap designed for cutting internal threads in both blind and through-hole applications. Manufactured from high speed steel with a bright uncoated finish, this plug-chamfer tap drives thread formation in a right-hand direction and holds a Class 2B fit with an H1 thread limit. The 3-flute straight-flute geometry provides reliable chip control and is well suited to manual tapping operations where consistent thread quality is required. Overall length is 2 inches with a thread length of 0.38 inches and a shank diameter of 0.141 inches.

This tap is intended for use in machine shops, maintenance facilities, and production environments where 6-40 UNF threaded holes are required. The plug chamfer style — with a moderate lead-in — makes it appropriate for starting threads in through-holes or in blind holes with adequate clearance below the thread zone. It performs across a range of workpiece materials including alloy steel, carbon steel, aluminum, and free-machining stainless steel, making it a versatile choice for general-purpose threading tasks handled by machinists and maintenance technicians.

Key Features

• 6-40 UNF thread form with right-hand direction and Class 2B fit tolerance
• Plug chamfer provides balanced lead-in for blind hole and through-hole threading
• H1 thread limit for consistent dimensional accuracy across production runs
• High speed steel construction resists wear across common workpiece materials
• Bright uncoated finish suitable for use with standard cutting fluids
• 3-flute straight-flute design aids chip evacuation in short-chipping materials

Compatibility

Designed for cutting 6-40 UNF internal threads in alloy steel, carbon steel, aluminum, and free-machining stainless steel workpieces in blind hole and through-hole configurations.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians using a tap wrench or tapping fixture. Always ensure the workpiece is securely fixtured and the pilot hole diameter matches the recommended tap drill size for 6-40 UNF threads before starting. Apply an appropriate cutting fluid for the workpiece material to extend tap life and improve thread finish. Do not force the tap if resistance increases sharply — back off to break chips and clear the flutes.