Spi 91-395-4 Feeler Gage 0.70mm Parallel Leaf

Product Description

The SPI 91-395-4 is a single-leaf feeler gage used to measure and verify precise gaps in mechanical assemblies, engine components, and equipment requiring close-tolerance clearance checks. The leaf measures 0.70 millimeters thick, 0.5 inches wide, and 12 inches long with a parallel profile, providing consistent thickness along the full length. Constructed from high carbon steel, it delivers the rigidity and wear resistance needed for repeated use in shop and field environments. HVAC technicians, machinists, and maintenance professionals use this tool to check valve clearances, burner orifice gaps, and similar precision fitment tasks.

This feeler gage is suited for residential and commercial maintenance applications where gap verification is part of routine service. Its 12-inch parallel leaf gives technicians reach into tight assemblies without sacrificing accuracy. The high carbon steel construction holds its ground against deformation under normal service loads. It is sold as a single-leaf unit, making it a practical addition to a gage set or a direct replacement for a worn or lost leaf of the same thickness.

Key Features

• 0.70 mm leaf thickness for precise gap measurement
• Parallel leaf style maintains uniform thickness across the full 12-inch length
• 0.5-inch leaf width fits most standard gap checking applications
• High carbon steel construction resists wear and deformation
• Single-leaf format for targeted replacement or standalone use

Compatibility

Designed as a standard-format parallel feeler gage leaf compatible with general-purpose gap measurement tasks across HVAC, mechanical, and industrial maintenance applications.

Installation Notes

Feeler gages require no installation tools but should be handled carefully to avoid bending the leaf, which would compromise measurement accuracy. Keep the leaf clean and lightly oiled when stored to prevent corrosion on the high carbon steel surface. When checking gaps on powered equipment, follow lockout/tagout procedures per applicable safety codes before inserting the gage. Do not force the leaf into a gap narrower than its rated thickness.