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The MILWAUKEE 86769 is a Markal Thermomelt temperature indicating stick designed to verify surface heat in field and shop applications. When the stick is applied to a surface, it melts at a calibrated threshold — in this case 450 degrees F — giving technicians and tradespeople an immediate, visible confirmation that a target temperature has been reached. No batteries, no probes, and no power source required. HVAC techs, welders, pipefitters, and industrial maintenance crews rely on this type of heat indicator to protect equipment, ensure proper process temperatures, and prevent overheating during brazing, soldering, and heat-treating operations.
The 86769 is suited for residential and commercial trade work wherever surface temperature verification is required. Common applications include checking pipe and fitting temperatures during brazing operations, monitoring heat levels on electrical enclosures, and confirming adequate preheat temperatures before welding. The stick format allows quick one-handed application to a workpiece without interrupting workflow. Each unit is sold individually, with a minimum order quantity of 12 per case.
Designed for general-purpose surface temperature indication in HVAC, plumbing, welding, and industrial maintenance applications where a 450 degrees F threshold mark is required.
Temperature indicating sticks are applied by tradespeople — HVAC technicians, pipefitters, and welders — directly to the workpiece surface during heating operations. Allow the surface to reach operating temperature before applying the stick; contact with the surface at or above the rated threshold will produce a visible melt. Do not apply the stick near open flame or use it as a substitute for calibrated instrumentation where code-required temperature verification is mandated. Store in a cool, dry location away from heat sources to prevent pre-conditioning of the stick material.
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