Starrett 52874 Feeler Gage 0.1mm Parallel Leaf

Product Description

The STARRETT 52874 is a single parallel-leaf feeler gage used to measure precise gaps and clearances in mechanical assemblies. The leaf measures 0.1 mm (approximately 0.004 inches) thick, 12.7 mm (approximately 0.5 inches) wide, and 300 mm (approximately 11.81 inches) long. Constructed from tempered steel, the leaf resists flex set and holds its calibrated thickness under repeated use. Machinists, HVAC technicians, and engine mechanics rely on feeler gages like this one to verify valve clearances, bearing end play, spark plug gaps, and similar close-tolerance fits where a direct measurement tool cannot reach.

This feeler gage leaf is suited for use in both shop and field environments. It fits applications in general mechanical maintenance, HVAC equipment service, and precision assembly work where a specific gap or clearance must be confirmed. The parallel leaf profile provides consistent contact across the full length of the gage, making it reliable for use in tight or restricted spaces. The 300 mm length allows reach into deeper assemblies without requiring an extension.

Key Features

• Parallel leaf profile delivers consistent thickness from tip to handle end
• Tempered steel construction maintains calibrated thickness under repeated bending and insertion
• 0.1 mm nominal thickness suitable for close-tolerance gap checks
• 300 mm length provides reach into deep or restricted assemblies
• 12.7 mm width offers a stable contact surface for accurate seating

Compatibility

Designed as a standard single-leaf feeler gage suitable for general mechanical, HVAC, and precision maintenance applications where a 0.1 mm gap measurement is required.

Installation Notes

Feeler gages are installed and removed by hand without special tools. Power down or de-energize equipment and allow rotating or pressurized components to come to a full stop before inserting the gage into any clearance. Do not force the leaf into a gap narrower than its rated thickness, as this can cause permanent set and compromise accuracy. Verify gage thickness against a known standard periodically to confirm calibration has not drifted due to wear.