Spi 91-373-1 Feeler Gauge 0.02 in Parallel Leaf Steel

Product Description

The SPI 91-373-1 is a single parallel-leaf feeler gauge manufactured from high carbon steel. It measures 0.02 inches thick, 0.5 inches wide, and 12 inches long, making it well suited for checking tight clearances in HVAC equipment, burner assemblies, compressor valve plates, and mechanical components where precise gap measurement is required. The parallel leaf style provides consistent thickness along the full length of the blade, giving technicians a reliable reference surface from tip to base. This gauge is a standard hand tool used by HVAC technicians, plumbers, and general mechanical trade professionals during maintenance, alignment, and inspection tasks.

This feeler gauge is used wherever a technician needs to verify or set a specific gap clearance. Common applications include checking heat exchanger burner orifice spacing, valve clearances, bearing fits, and component alignment in both residential and light commercial mechanical systems. The 12-inch leaf length provides reach into confined equipment housings without requiring the technician to disassemble additional components. The 0.5-inch width is a standard blade width compatible with most feeler gauge holders and handles.

Key Features

• Parallel leaf style maintains consistent 0.02-inch thickness along the full 12-inch length
• High carbon steel construction resists bending and deformation under normal use
• 0.5-inch blade width fits standard feeler gauge handles and holders
• 12-inch length provides reach into confined spaces without full disassembly
• Single-leaf format for direct use or insertion into a multi-blade holder set

Compatibility

Designed as a standard 0.02-inch replacement or supplemental leaf for use with conventional feeler gauge handles and multi-blade gauge sets. Compatible with any holder that accepts 0.5-inch wide parallel leaves.

Installation Notes

Feeler gauges are hand tools and require no installation. Power down or de-energize any equipment before inserting a gauge into gaps near live electrical components or moving parts. Do not force the blade into a gap smaller than the rated thickness, as this can permanently deform the leaf and compromise accuracy. Clean the blade of oil and debris before and after use to maintain measurement integrity.