Cleveland C55136 Hand Tap 9/16-12 Unc Tin Hss 4-flute

Product Description

The CLEVELAND C55136 is a 9/16-12 UNC straight-flute hand tap designed for threading operations in machine shops and fabrication environments. Built from high speed steel with a titanium nitride (TiN) coating, this tap delivers extended tool life compared to uncoated HSS taps, especially in abrasive or higher-hardness materials. The plug chamfer (3-5 thread lead-in) makes it suitable for both through-hole and blind-hole threading applications. It carries a right-hand thread direction, an H3 thread limit, and a Class 2B fit tolerance. Overall length is 3-19/32 inches with a thread length of 1-21/32 inches.

This tap is used in general-purpose threading of 9/16-12 UNC holes across a range of metalworking applications. It is suited for both production and maintenance threading tasks in alloy steel, carbon steel, aluminum, and free-machining stainless steel. The 4-flute straight-flute geometry is optimized for use with a tap handle or tapping machine in both blind-hole and through-hole configurations. It is a standard Series 1002TN tool intended for manual and light machine tapping in professional trade and industrial settings.

Key Features

• TiN coating extends tool life and reduces friction compared to bare HSS
• Plug chamfer provides 3-5 thread lead-in for versatile blind and through-hole use
• H3 thread limit with Class 2B fit for standard UNC tolerance requirements
• 4-flute straight-flute geometry suitable for manual and machine tapping
• Compatible with alloy steel, carbon steel, aluminum, and free-machining stainless steel
• Right-hand thread direction, no coolant-through requirement

Compatibility

Designed for threading 9/16-12 UNC holes in alloy steel, carbon steel, aluminum, and free-machining stainless steel. Suitable for blind-hole and through-hole threading applications.

Installation Notes

Installation is performed by machinists or maintenance tradespeople using a standard tap handle or tapping machine. Always secure the workpiece and ensure the tap is properly aligned before beginning the threading pass. Apply appropriate cutting fluid for the material being tapped. Back the tap out periodically in manual tapping to break chips and prevent tap breakage, particularly in blind holes.