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The PRECISION BRAND 19310 is a single parallel-leaf feeler gage used to measure and verify precise clearances, gaps, and tolerances in mechanical assemblies. The leaf measures 0.007 inches thick, 0.5 inches wide, and 12 inches long, providing a consistent measurement surface across the full length. Constructed from high carbon steel, this leaf delivers the hardness and flatness required for repeatable dimensional checks. Machinists, millwrights, HVAC technicians, and engine service professionals use feeler gages like this one when setting valve clearances, checking bearing fits, verifying blade-to-housing gaps, or confirming component alignment during installation and maintenance.
This feeler gage leaf is suited for a wide range of residential and commercial service applications where close-tolerance gap measurement is required. Common use cases include furnace burner and heat exchanger inspection, compressor valve clearance checks, pump impeller clearance verification, and general mechanical assembly work in the field or shop. The 12-inch parallel leaf format allows the technician to reach into confined spaces while maintaining accurate contact across the full width of the measured gap.
Designed as a standard parallel-leaf feeler gage replacement suitable for general mechanical, HVAC, plumbing, and industrial maintenance applications requiring a 0.007-inch thickness leaf.
Feeler gages are hand tools used by machinists, HVAC technicians, and mechanical service professionals. Power down or de-energize any equipment before inserting the leaf into a gap near moving or energized components. Do not force the leaf into a gap that is tighter than the leaf thickness, as bending or kinking will compromise accuracy. Clean mating surfaces before measurement to prevent debris from affecting the reading.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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