Spi 91-344-2 Parallel Feeler Gage Set 20 Piece 0.05-1mm

Product Description

The SPI 91-344-2 is a 20-piece parallel feeler gage set designed for precise gap and clearance measurements in maintenance, machining, and assembly applications. Each leaf is manufactured from steel and measures 6 inches in length by 0.5 inches in width, with a parallel profile that delivers consistent contact across the full leaf length. The set covers a measurement range of 0.05 mm to 1.00 mm, with leaves stepping in 0.05 mm increments. Machinists, millwrights, engine builders, and service technicians rely on this type of set for checking valve clearances, bearing fits, mating surface gaps, and similar precision tolerance work.

This feeler gage set is suited for both shop and field use where metric gap measurement is required. The parallel leaf style makes it well-suited for applications where the full width of the blade needs to seat flat against mating surfaces, such as checking cylinder head gasket surfaces, gear backlash, or machine tool ways. The closed length of 6 inches keeps the set compact enough to store in a toolbox or service bag without taking up significant space.

Key Features

• 20 steel leaves covering 0.05 mm to 1.00 mm in 0.05 mm steps
• Parallel leaf style ensures consistent thickness along the full 6-inch length
• Leaf dimensions: 6 inches long by 0.5 inches wide
• Steel construction for durability and resistance to flex under measurement load
• Compact closed length of 6 inches for toolbox storage

Compatibility

Designed as a general-purpose metric feeler gage set for use in machining, engine service, HVAC equipment maintenance, and industrial assembly applications where gap tolerances are specified in millimeters.

Installation Notes

Feeler gages require no installation but should be handled with care to avoid bending or kinking individual leaves, which would compromise measurement accuracy. Clean the leaves and mating surfaces before use to remove debris that could affect readings. Store the set fully closed to protect leaves from damage. Calibration should be verified periodically if the set is used for critical tolerance work.