Century Drill Tool Co Inc 95113 9/16x12 Nc Fractional Tap

Product Description

The CENTURY DRILL TOOL CO INC 95113 is a 9/16 inch by 12 National Coarse (NC) fractional hand tap made from carbon steel. It cuts Class 2B threads in a wide range of materials, making it a practical choice for maintenance and repair tasks where a general-purpose thread fit is acceptable. The straight flutes are ground to promote fast chip removal, keeping the cutting action clean and efficient during hand threading. This tap is well suited for rethreading damaged fastener holes and tapping new holes in situations where ultra-tight thread tolerances are not required. Use a 31/64 inch drill bit to prepare the pilot hole before tapping.

This tap is intended for hand threading applications in maintenance, repair, and light fabrication work across residential, commercial, and industrial settings. Electricians, plumbers, HVAC technicians, and general maintenance professionals reach for fractional NC taps when restoring stripped threads or adding threaded holes to metal brackets, enclosures, and fittings. The 9/16-12 NC thread size is a common fractional coarse-thread standard found throughout structural hardware, pipe fittings, and mechanical assemblies.

Key Features

• 9/16 inch by 12 National Coarse thread form for broad compatibility with standard NC fasteners
• Carbon steel construction provides adequate hardness for general-purpose hand threading tasks
• Straight flutes ground for rapid chip removal and efficient cutting action
• Produces a Class 2B thread fit, appropriate for most maintenance and repair applications
• Recommended pilot hole: 31/64 inch drill bit
• Designed specifically for hand threading work across a variety of materials

Compatibility

Designed as a general-purpose fractional hand tap for use in any material where a 9/16-12 NC thread is required, including steel, aluminum, brass, and similar workpiece materials suited to carbon steel cutting tools.

Installation Notes

Drill the pilot hole to 31/64 inch before starting the tap. Secure the workpiece firmly and use a properly sized tap wrench to maintain straight, controlled cutting. Apply a suitable cutting fluid or tapping oil to extend tool life and improve thread quality. Advance the tap slowly, backing off a quarter turn periodically to break and clear chips and prevent binding or breakage.