Spi 91-345-9 Parallel Feeler Gage Set 32 Piece

Product Description

The SPI 91-345-9 is a 32-piece parallel feeler gage set designed for precision gap measurement in mechanical assembly, engine work, and equipment maintenance. Each leaf is made from high-carbon steel and measures 12 inches in length by 0.5 inches wide. The set covers a measurement range of 0.001 to 0.030 inches, giving technicians a broad spread of thicknesses for checking valve clearances, bearing fits, and machined surface gaps. The parallel leaf style ensures consistent width from tip to handle, which matters when measuring in tight or confined spaces. This is a standard inch-measurement set suited for trade professionals who need reliable gap gages on the bench or in the field.

This feeler gage set is used across HVAC, mechanical, and general maintenance trades wherever precise gap or clearance measurement is required. Typical applications include checking heat exchanger fin spacing, verifying burner orifice clearances, measuring brake rotor runout gaps, setting valve lash on reciprocating equipment, and confirming fitment tolerances during assembly or inspection. The 12-inch closed length makes it easy to store in a tool bag or service kit.

Key Features

• 32 individual leaves covering 0.001 to 0.030 inches thickness range
• Parallel leaf style maintains consistent 0.5-inch width across full 12-inch length
• High-carbon steel construction for durability and resistance to bending during use
• Inch-measurement type for compatibility with standard U.S. trade specifications
• Compact closed profile at 12 inches length for portable field use

Compatibility

Designed as a general-purpose parallel feeler gage set for inch-measurement applications across HVAC, mechanical, and industrial maintenance work. No specific equipment compatibility is stated by the manufacturer.

Installation Notes

Feeler gages do not require installation, but proper use is essential for accurate readings. Insert the appropriate leaf into the gap with light drag resistance — forcing a leaf or bending it against a surface will cause permanent deformation and inaccurate future readings. Keep leaves clean and lightly oiled to prevent corrosion and sticking. Store the set closed to protect the leaves from damage.