Spi 15-037-5 Steel Gage Block 0.123 in Grade AS-1

Product Description

The SPI 15-037-5 is a rectangular steel gage block ground to a nominal size of 0.123 inches and certified to Grade AS-1 accuracy. Gage blocks are precision reference standards used to calibrate measuring instruments, set comparators, and verify dimensional tolerances on the shop floor or in the metrology lab. This block ships with NIST certification documentation, confirming traceability to national measurement standards. Grade AS-1 meets the tolerance requirements for inspection-grade work, making it suitable for use in quality control environments where instrument calibration and dimensional verification demand tight accuracy.

This gage block is used in manufacturing, machining, and metrology environments wherever a traceable dimensional reference standard is required. Typical applications include calibrating micrometers, dial indicators, and height gages, as well as setting up fixtures and inspection routines. It is appropriate for both shop-floor use and controlled metrology lab environments. The block is sold individually, allowing technicians and calibration specialists to replace a single worn or damaged block within an existing set without purchasing a full set.

Key Features

• Nominal size of 0.123 inches ground to Grade AS-1 accuracy tolerances
• Includes NIST certification for full traceability to national standards
• Steel construction provides durability and wear resistance under repeated use
• Rectangular form compatible with standard gage block accessories and holders
• Sold as a single block for individual replacement or standalone calibration use

Compatibility

Designed as an OEM-style replacement or standalone reference standard compatible with rectangular gage block sets and accessories that accept 0.123-inch nominal blocks conforming to Grade AS-1 tolerances.

Installation Notes

Gage blocks are handled and stored by metrology technicians and calibration specialists. Always clean block surfaces with an appropriate solvent and lint-free cloth before use to prevent debris from affecting accuracy readings. Store blocks in a protective case away from humidity and temperature extremes to prevent corrosion and dimensional drift. Do not drop or wring blocks forcefully, as steel gage blocks are precision ground and susceptible to surface damage that compromises accuracy.