Spi 91-370-7 Feeler Gauge 0.017 in Parallel Leaf

Product Description

The SPI 91-370-7 is a single-leaf feeler gauge designed for precision gap measurement in HVAC, refrigeration, and mechanical service applications. The leaf measures 0.017 inches thick, 0.5 inches wide, and 12 inches long, with a parallel profile that delivers consistent thickness across the full length of the blade. Constructed from high carbon steel, the leaf resists flex and wear under repeated use. This gauge is a standard hand tool for technicians checking burner electrode gaps, valve clearances, bearing tolerances, and similar close-tolerance measurements in the field or shop.

This feeler gauge leaf is suited for use in residential and light commercial service environments where precise gap measurement is required. Technicians use individual leaves of this type when checking igniter-to-burner electrode spacing, compressor valve clearances, or mechanical fits during equipment overhaul. The 12-inch blade length provides reach into recessed assemblies without requiring disassembly of surrounding components. The parallel leaf geometry ensures the stated thickness is uniform from tip to base, eliminating taper-related measurement error.

Key Features

• Parallel leaf profile maintains consistent 0.017-inch thickness across the full 12-inch length
• High carbon steel construction for durability and resistance to deformation under repeated use
• 0.5-inch blade width provides a stable contact surface for accurate gap readings
• 12-inch length allows reach into deep or partially obstructed assemblies
• Single-leaf format allows use as a standalone gauge or in combination with other leaves

Compatibility

Designed as a general-purpose feeler gauge leaf suitable for gap measurement tasks across HVAC, refrigeration, plumbing, and general mechanical service applications.

Installation Notes

Feeler gauge leaves are hand tools requiring no installation; however, always de-energize and lock out equipment before inserting a gauge into any live mechanical assembly. Keep blade surfaces clean and free of oil contamination to ensure accurate contact readings. Inspect the leaf for bends or nicks before use, as blade damage will produce inaccurate measurements. Dispose of worn or deformed leaves rather than continuing to use them for tolerance-critical work.