Cleveland C54090 Hand Tap 2-56 Plug Rh 2B H2 Hss

Product Description

The CLEVELAND C54090 is a 2-56 straight-flute hand tap designed for cutting right-hand internal threads in small-diameter blind holes and through-holes. Built from high-speed steel with a bright uncoated finish, this tap delivers consistent thread geometry in a plug chamfer style, making it suitable for starting threads partway into a hole and completing full-depth engagement. The plug chamfer distributes cutting load gradually, reducing the risk of tap breakage in small-diameter work. At 1.75 inches overall length with a 0.44-inch thread length, this tap is sized for precision threading applications where clearance and control are critical. Machinists and tool-and-die tradespeople are the primary installers.

This tap is suited for threading operations in alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces. It is appropriate for both blind-hole and through-hole threading in production and maintenance machining environments. The 2-56 UNC thread size and H2 thread limit make it a common choice for instrument-grade and small-fastener work where tight dimensional tolerances are required. Series 1002 from CLEVELAND is a standard catalog offering for general-purpose hand tapping in these material groups.

Key Features

• Plug chamfer distributes cutting load across multiple threads, reducing breakage risk in small diameters
• High-speed steel construction provides durability across alloy steel, aluminum, carbon steel, and free-machining stainless steel
• Bright uncoated finish allows visual wear monitoring and suits a wide range of cutting fluids
• H2 thread limit ensures consistent 2B class-of-fit compliance for standard fastener applications
• 3-flute straight-flute geometry provides chip clearance for through-hole and blind-hole threading
• Right-hand thread direction compatible with standard tapping handles and tap wrenches

Compatibility

Designed for blind-hole and through-hole threading in alloy steel, aluminum, carbon steel, and free-machining stainless steel. Produces 2-56 UNC right-hand threads to a 2B class of fit with H2 thread limit.

Installation Notes

This tap is intended for use by machinists using a standard tap wrench or tapping handle with appropriate cutting fluid for the workpiece material. Secure the workpiece firmly before threading and ensure the tap is started perpendicular to the hole to avoid thread misalignment or breakage. Back off the tap periodically to break and clear chips, particularly in blind holes. Consult applicable shop safety standards and tooling manufacturer guidelines for small-diameter tap handling.