Starrett 52839 Feeler Gage 0.002 in Parallel Leaf Steel

Product Description

The STARRETT 52839 is a single-leaf feeler gage used to measure precise clearances and gaps in mechanical assemblies. The leaf measures 0.002 inches thick, 0.5 inches wide, and 12 inches long with a parallel profile that delivers consistent thickness across the full length. Constructed from tempered steel, it resists flex and wear under repeated use. HVAC technicians, machinists, and mechanical contractors use feeler gages like this one to verify valve clearances, burner orifice gaps, bearing tolerances, and other tight-tolerance measurements during installation and service work.

This gage is suited for both shop and field use wherever a 0.002-inch gap measurement is required. Typical applications include checking flue collar clearances, heat exchanger component fits, blower wheel tolerances, and general mechanical clearance verification on residential and light commercial equipment. The 12-inch leaf length provides reach into confined spaces common in HVAC and mechanical service work.

Key Features

• Parallel leaf profile ensures uniform 0.002-inch thickness along the full 12-inch length
• Tempered steel construction provides durability and resistance to bending under normal use
• 0.5-inch leaf width offers a stable measuring surface for consistent gap readings
• 12-inch length allows reach into tight or deep assemblies
• Single-leaf format simplifies use when only one specific gap thickness is needed

Compatibility

Designed as a general-purpose feeler gage for use across HVAC, plumbing, mechanical, and industrial service applications where a 0.002-inch gap measurement is required.

Installation Notes

Feeler gages are hand tools installed by HVAC technicians, machinists, and mechanical contractors during equipment inspection or assembly. Power down and lock out any equipment before inserting the gage into a gap on a mechanical assembly. Do not force the leaf into a gap narrower than the leaf thickness, as this can cause permanent deformation. Clean the leaf after each use to prevent corrosion and maintain measurement accuracy.