Starrett 52855 Feeler Gage 0.017 in Parallel Leaf Steel

Product Description

The STARRETT 52855 is a single-leaf feeler gage designed for precise gap measurement in mechanical assembly, alignment, and clearance inspection work. The leaf measures 0.017 inches thick, 0.5 inches wide, and 12 inches long with a parallel profile that maintains consistent thickness along the full length. Constructed from tempered steel, the blade resists flex and wear under repeated use. Machinists, millwrights, HVAC technicians, and engine technicians use feeler gages like this to verify valve clearances, bearing clearances, and component spacing to manufacturer tolerances.

This feeler gage is suited for both shop and field use wherever a 0.017-inch gap measurement is required. Common applications include checking spark plug gaps, setting valve lash, verifying brake rotor runout tolerances, and inspecting compressor valve plate clearances. The 12-inch leaf length accommodates deep-reach measurements that shorter blades cannot access. The parallel leaf style ensures the same thickness reading at any point along the blade.

Key Features

• Parallel leaf profile maintains uniform 0.017-inch thickness across the full 12-inch length
• Tempered steel construction provides durability and resistance to deformation
• 0.5-inch width gives a stable bearing surface for consistent gap readings
• 12-inch length allows deep-reach access in confined assemblies
• Single-leaf format for straightforward, dedicated-thickness measurement tasks

Compatibility

Designed as a standard single-leaf feeler gage for general mechanical clearance and gap measurement applications across HVAC, industrial, and automotive service work.

Installation Notes

Feeler gages are precision measurement tools and should be handled by qualified mechanics, technicians, or machinists familiar with gap and clearance inspection procedures. Clean mating surfaces before use to prevent debris from affecting readings. Do not force the blade into a gap; apply light, consistent pressure to avoid bending or kinking the leaf, which would compromise measurement accuracy. Store the blade clean and dry to prevent corrosion and maintain calibration.