Mitutoyo 614178-531 Square Steel Gage Block 0.138 in Grade 0

Product Description

The MITUTOYO 614178-531 is a square steel gage block measuring 0.138 inches in overall length, manufactured to Accuracy Grade 0 per ASME standards. Gage blocks are precision reference standards used to calibrate measuring instruments, set comparators, and verify dimensional tolerances in machine shops, metrology labs, and manufacturing environments. Each block comes with a Certificate of Inspection, confirming it has been measured and documented against the stated accuracy grade. This block is handled and used by machinists, metrologists, and quality control technicians who require traceable dimensional references for precision measurement work.

This 0.138-inch gage block is suited for use in tool rooms, inspection departments, and production environments where close-tolerance measurement and instrument calibration are required. Its square form factor and steel construction make it appropriate for general-purpose metrology applications in both light manufacturing and heavy industrial settings. The included Certificate of Inspection supports documentation requirements for ISO and quality management system compliance.

Key Features

• Grade 0 accuracy per ASME standards for high-precision dimensional reference
• Steel construction for durability and stability in shop and lab environments
• 0.138-inch nominal size for specific gauge block set builds or individual calibration use
• Includes Certificate of Inspection for traceable quality documentation
• Square form factor compatible with standard gage block accessories and holders

Compatibility

Designed as an OEM-style precision reference standard for use with gage block sets, comparators, and calibration fixtures requiring a 0.138-inch steel block to ASME Grade 0 specifications.

Installation Notes

Gage blocks should be handled by trained metrology or quality control personnel. Store blocks in a protective case away from moisture, debris, and temperature extremes to prevent corrosion and dimensional drift. Before use, clean mating surfaces with a lint-free cloth and allow blocks to thermally stabilize to the measurement environment. Wringing or stacking with other blocks should be done carefully to avoid surface damage that could affect accuracy.