No-Go (Minus) Pin Gauge Sets & Libraries

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Our No-Go (Minus) Pin Gauge Sets & Libraries feature Class ZZ tolerance gauges, designed for precision No-Go testing to verify that a hole's diameter does not exceed the maximum specified size. If the No-Go or Minus gauge cannot enter the bore, the hole is within the acceptable tolerance range. These versatile Class ZZ gauges are available in uncoated steel or with a durable black oxide coating, which visually indicates wear for timely replacement. The sets include numerous pins in a convenient, portable case, each clearly labeled for easy identification. For larger collections, our libraries offer organized storage in multi-drawer cabinets or tool chests, housing hundreds to thousands of pin gauges sorted by diameter for efficient access.