Mitutoyo 64AAA219 Thread Measuring Wire 24 Tpi 0.04 Pitch

Product Description

The MITUTOYO 64AAA219 is a thread pitch diameter measuring wire designed for precise internal thread measurement in metrology and quality control applications. Each wire is 1.125 inches long with a nominal best wire diameter of 0.0241 inches and a nominal constant of 0.0375 inches. Calibrated for 24 TPI threads with a 0.04 inch pitch, these wires are used with a micrometer to calculate the pitch diameter of threaded workpieces. The set includes 3 wires, which is the standard quantity required for the three-wire measurement method. Machinists, tool room technicians, and quality control inspectors rely on these for shop-floor and lab-grade thread verification.

These measuring wires are suited for use with thread plug gages and precision measuring equipment in manufacturing, tooling, and inspection environments. Typical applications include verifying pitch diameter on external threads cut to unified or metric thread standards at 24 TPI. They are used in both production floor inspection and tool room settings where accurate thread form verification is required.

Key Features

• Calibrated for 24 TPI threads with 0.04 inch pitch
• Nominal best wire diameter of 0.0241 inches for accurate three-wire measurement
• Nominal constant of 0.0375 inches for direct pitch diameter calculation
• Wire length of 1.125 inches provides consistent contact and handling
• Set of 3 wires supports the standard three-wire measurement method
• Compatible with thread plug gages and standard micrometer setups

Compatibility

Designed for use with thread plug gages and precision micrometers in three-wire pitch diameter measurement setups for 24 TPI threaded components.

Installation Notes

Thread measuring wires are used by machinists and metrology technicians and require no power tools or mechanical installation. Ensure the micrometer anvil faces are clean and free of debris before measurement to prevent wire slippage or inaccurate readings. Handle wires carefully to avoid nicks or deformation, as surface damage will affect measurement accuracy. Follow the wire manufacturer nominal constant value when applying the three-wire formula to calculate pitch diameter.