Spi 91-362-4 Feeler Gauge 0.009 in Parallel Leaf 12 in

Product Description

The SPI 91-362-4 is a single-leaf feeler gauge designed for precise gap and clearance measurement in trade and industrial service work. The leaf measures 0.009 inches thick, 0.5 inches wide, and 12 inches long with a parallel profile that maintains consistent thickness along the full length. Constructed from high carbon steel, the blade resists bending and holds its calibrated dimension under repeated use. HVAC technicians, mechanics, and plumbers use feeler gauges to set burner electrode gaps, check valve clearances, and verify critical dimensional tolerances during equipment installation and maintenance.

This gauge is suited for applications requiring accurate measurement of tight clearances in residential and light commercial equipment. The 12-inch parallel leaf length provides reach into deep assemblies or confined spaces where a shorter blade would be impractical. The 0.5-inch blade width keeps the gauge stable during measurement without obstructing access in standard service openings. It is a single leaf sold individually, making it a practical replacement or addition to an existing gauge set.

Key Features

• Parallel leaf profile maintains 0.009-inch thickness along the full 12-inch length
• High carbon steel construction for dimensional stability and durability
• 0.5-inch blade width provides stable contact without excessive bulk
• 12-inch length allows reach into deep or confined assemblies
• Single-leaf format works standalone or as a replacement for a missing gauge set blade

Compatibility

Designed as a general-purpose feeler gauge leaf for gap and clearance measurement tasks in HVAC, plumbing, and mechanical service applications where a 0.009-inch parallel-leaf gauge is required.

Installation Notes

Feeler gauges are a measuring instrument, not a replacement part. De-energize and lock out any equipment before inserting the gauge blade into a gap or clearance point. Avoid forcing the blade; resistance indicates the gap is smaller than the blade thickness. Wipe the blade clean after each use to prevent corrosion and maintain measurement accuracy.