Cleveland C55102 Hand Tap 6-40 Unf Plug Rh Tin Hss

Product Description

The CLEVELAND C55102 is a 6-40 UNF straight flute hand tap designed for cutting internal threads in both blind holes and through-holes. Built from high speed steel with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction during threading operations. The plug chamfer style provides a gradual lead-in, making it suitable for general-purpose tapping work. With a right-hand thread direction, 3-flute geometry, and H2 thread limit, this tap produces Class 2B and 3B fits — the tolerances most commonly specified for standard fastener assemblies in industrial and maintenance applications. Overall length is 2 inches with a thread length of 11/16 inches.

This tap is intended for use in machine shops, maintenance and repair operations, and production environments where 6-40 UNF threads are required. It is suited for both blind hole and through-hole threading applications. Compatible material applications include alloy steel, aluminum, carbon steel, and free-machining stainless steel, making it a versatile choice for machinists and tooling technicians working across a range of workpiece materials. It belongs to the Cleveland Series 1002TN, a straight flute hand tap line.

Key Features

• TiN coating reduces friction and extends tool life compared to uncoated HSS taps
• Plug chamfer provides gradual thread engagement, ideal for general-purpose threading
• 3-flute straight flute geometry suits a wide range of workpiece materials
• H2 thread limit produces Class 2B and 3B fits for standard fastener tolerance requirements
• Right-hand thread direction; compatible with blind hole and through-hole applications
• Compact 2-inch overall length for use in confined work areas

Compatibility

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

Installation Notes

This tap is installed by machinists or tooling technicians using a standard tap wrench or tapping fixture. Before use, ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill diameter for a 6-40 UNF thread. Apply appropriate cutting fluid for the workpiece material to promote chip evacuation and prolong tap life. Straight flute taps do not actively evacuate chips, so back off periodically during blind hole tapping to break and clear chips.