Starrett 52853 Feeler Gage 0.015 in Parallel Leaf Steel

Product Description

The STARRETT 52853 is a single-leaf feeler gage used to measure and verify precise clearances and gaps in mechanical assemblies. The leaf is ground to a thickness of 0.015 inches, making it suitable for tight-tolerance work on valves, spark plugs, bearings, and other components where accurate gap measurement is critical. The parallel leaf design maintains consistent width of 0.5 inches across the full 12-inch length, giving technicians a stable, reliable contact surface. Constructed from tempered steel, the leaf resists wear and holds its calibrated thickness under repeated use. This tool is commonly used by HVAC technicians, machinists, and general maintenance professionals.

This feeler gage leaf is suited for residential and commercial maintenance applications where precise gap checks are required during equipment installation, adjustment, or inspection. The 12-inch length provides reach into confined spaces on HVAC equipment, pumps, motors, and mechanical components. The 0.015-inch thickness is a commonly called-out clearance spec in a range of service procedures. The leaf works as a standalone measurement reference or alongside other leaves in a set.

Key Features

• Ground to 0.015 inches thickness for accurate gap measurement
• Parallel leaf design with consistent 0.5-inch width along full length
• 12-inch length for extended reach in confined work areas
• Tempered steel construction resists deformation and wear
• Flat, smooth surface for reliable contact against measured components

Compatibility

Designed as an OEM-style single feeler gage leaf suitable for general mechanical and HVAC service applications requiring 0.015-inch gap verification.

Installation Notes

Feeler gages are non-powered hand tools requiring no installation, but proper use requires that both mating surfaces be clean and free of debris before inserting the leaf. Apply only light drag pressure when checking a gap — forcing the leaf can bend or distort it and compromise calibration. Store leaves flat and clean to maintain accuracy over time. No trade license is required to use a feeler gage, though gap specifications should always be verified against the equipment manufacturer's service documentation.