Go (Plus) Pin Gauge Sets & Libraries

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Our Go (Plus) Pin Gauge Sets and Libraries feature precision Class ZZ tolerance gauges designed to verify that a hole's diameter meets the minimum specified size. The Go or plus gauge's fit into the bore confirms the hole is within acceptable minimal size tolerance. Ideal for general applications, these gauges are available in uncoated steel or with a durable black oxide coating, which serves as a wear indicator to signal when replacement is needed. The sets include a comprehensive range of pins, neatly organized in a portable case with clearly marked sizes. For larger collections, our libraries offer stationary storage in file cabinets or metal tool chests, with multiple drawers housing hundreds to thousands of pin gauges, meticulously sorted by ascending diameters.