Spi 15-021-9 Steel Gage Block 0.107 in Grade AS-1

Product Description

The SPI 15-021-9 is a rectangular steel gage block ground to a nominal size of 0.107 inches and certified to Grade AS-1 accuracy. Gage blocks serve as dimensional reference standards used to calibrate measuring instruments, set comparators, and verify part tolerances on the shop floor or in the metrology lab. This block includes NIST certification, providing a traceable accuracy reference required in quality-controlled manufacturing and inspection environments. The steel construction delivers the hardness and stability needed for reliable, repeatable dimensional reference work. Grade AS-1 meets demanding accuracy requirements for precision measurement applications.

This gage block is suited for use in machine shops, tool rooms, quality assurance labs, and inspection departments where traceable dimensional standards are required. It is a single-block unit at 0.107 inches, making it useful as a standalone reference or as part of a larger set when wringing blocks together to achieve compound dimensions. Typical users include machinists, metrology technicians, and quality control inspectors working in both production and maintenance environments.

Key Features

• Nominal size of 0.107 inches for precise dimensional reference
• Grade AS-1 accuracy for high-precision measurement and calibration work
• Steel construction provides hardness and long-term dimensional stability
• Includes NIST certification for traceable accuracy documentation
• Rectangular form supports wringing with other gage blocks to build compound dimensions

Compatibility

Designed as an OEM-style replacement or supplemental reference block compatible with standard rectangular gage block sets used in shop and laboratory dimensional inspection applications.

Installation Notes

Gage blocks should be handled by metrology technicians or trained machinists familiar with proper wringing technique and block care. Before use, clean contact surfaces thoroughly to remove oil, debris, and burrs that could affect accuracy or damage the lapped faces. Store blocks in their protective case when not in use to prevent corrosion and surface damage. Recalibrate or inspect for wear on a schedule consistent with your quality management system requirements.