Starrett 52851 Feeler Gage 0.013 in Parallel Leaf Steel

Product Description

The STARRETT 52851 is a single-leaf feeler gage designed for precise gap measurement in mechanical and HVAC service applications. The leaf measures 0.013 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 wear and holds its calibrated dimension through repeated use. HVAC technicians, plumbers, electricians, and general maintenance professionals use feeler gages to verify clearances, check valve seats, set igniter gaps, and confirm bearing tolerances.

This gage is suited for both residential and light commercial service work where accurate gap measurement is required. Common applications include checking furnace burner orifice alignment, setting electrodes on oil and gas equipment, verifying mechanical clearances during motor and pump service, and inspecting mating surfaces during component replacement. The 12-inch blade length provides reach into confined spaces without requiring disassembly of surrounding components.

Key Features

• Calibrated thickness of 0.013 inches for precise gap measurement
• Parallel leaf style maintains uniform thickness across the full 12-inch length
• Tempered steel construction resists deformation and wear during repeated use
• 0.5-inch blade width provides adequate surface contact for stable readings
• Single-leaf format allows targeted use without handling a full gage set

Compatibility

Designed as a standard single-leaf feeler gage for use in any application requiring a 0.013-inch gap measurement reference.

Installation Notes

Feeler gages are precision measurement tools installed or used by technicians during inspection and adjustment procedures. Always power down and de-energize equipment before inserting a gage near electrical components or moving parts. Do not force the blade into a gap narrower than its rated thickness, as this can permanently deform the leaf and compromise measurement accuracy. Clean the blade before and after use to prevent contamination of precision mating surfaces.