Mitutoyo 64AAA230 Thread Pitch Diameter Wire 9 Tpi

Product Description

The MITUTOYO 64AAA230 is a set of three thread pitch diameter measuring wires designed for precise internal thread measurement. Each wire measures 2.25 inches in length with a nominal best wire diameter of 0.0642 inches and a nominal constant of 0.0972 inches. Engineered for use with thread plug gages, these wires support measurement of threads at 9 TPI with a pitch of 0.11 inches. Machinists, quality control technicians, and tool-and-die professionals rely on this type of wire set to verify thread pitch diameter to tight tolerance standards using the three-wire measurement method.

These measuring wires are suited for shop-floor and metrology-lab environments where accurate thread verification is required. The 9 TPI specification makes them appropriate for unified or inch-series threaded components commonly found in industrial, mechanical, and precision manufacturing applications. They are intended for use alongside thread plug gages and a micrometer capable of measuring over wires. The set includes 3 wires, allowing full three-wire method setups without sourcing additional components.

Key Features

• Nominal best wire diameter of 0.0642 inches for 9 TPI threads
• Nominal constant of 0.0972 inches for direct pitch diameter calculation
• Wire length of 2.25 inches for stable contact during measurement
• Compatible with thread plug gage applications
• Includes 3 wires per set to support the three-wire measurement method
• Pitch of 0.11 inches for consistent TPI-matched contact geometry

Compatibility

Designed for use with thread plug gages measuring 9 TPI inch-series threads requiring a 0.11 inch pitch and the three-wire measurement method.

Installation Notes

Thread measuring wires are used by machinists and quality technicians and require no permanent installation. Handle wires carefully to avoid nicks or bending, as surface damage will affect measurement accuracy. Use with a calibrated micrometer and apply the appropriate wire constant when calculating pitch diameter. Store wires in their original case when not in use to prevent contamination or damage.