Collection: Gauge Blocks

Trusted by machinists for calibration and inspection, our gauge blocks (also known as slip gauges or Jo blocks) are precision-ground to deliver consistent, repeatable measurements. Available in steel, ceramic, and carbide options, these ISO-grade blocks are ideal for toolroom setups and metrology labs alike. Whether you're stacking for custom lengths or checking micrometer accuracy, these cost-effective standards are built to perform. With access to over 50,000 products, we can source exactly what you need.

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