Starrett 52879 Feeler Gage 0.35mm Parallel Leaf

Product Description

The STARRETT 52879 is a single-leaf feeler gage designed for precise gap and clearance measurement in mechanical and trade applications. The leaf measures 0.35 mm thick, 12.7 mm wide, and 300 mm long, constructed from tempered steel for durability and dimensional stability under repeated use. This type of feeler gage is a standard precision tool used by HVAC technicians, machinists, mechanics, and maintenance professionals to verify tolerances, set valve clearances, check spark plug gaps, and confirm fitment in tight assemblies. The parallel leaf profile delivers consistent thickness across the full length of the blade.

Feeler gages of this type see regular use in both residential and commercial service environments. Typical applications include checking air gaps on motor and compressor components, setting furnace burner clearances, verifying bearing fits, and inspecting machined mating surfaces. The 300 mm blade length provides reach into deeper assemblies where shorter gages cannot access. This SKU represents a single precision leaf at the 0.35 mm thickness, suitable for use alone or alongside other leaves in a custom gage set.

Key Features

• Parallel leaf profile ensures uniform 0.35 mm thickness from end to end
• Tempered steel construction resists wear and maintains calibration over time
• 300 mm blade length provides extended reach into deep assemblies
• 12.7 mm blade width offers stable surface contact during measurement
• Single-leaf format allows integration into custom gage sets or standalone use

Compatibility

Designed as a standard parallel-leaf feeler gage suitable for general gap and clearance measurement tasks across HVAC, mechanical, and industrial maintenance applications.

Installation Notes

Feeler gages are hand tools requiring no installation, but proper use demands that mating surfaces be clean and free of debris before measurement. Insert the leaf with light, consistent finger pressure — forcing the blade can spring or distort the leaf and introduce measurement error. Store leaves flat and away from moisture to prevent corrosion that would affect dimensional accuracy.