Mitutoyo 611681-531 Steel Gage Block 100 Mm Grade 0

Product Description

The MITUTOYO 611681-531 is a rectangular steel gage block with a nominal length of 100 mm, manufactured to Grade 0 accuracy. Gage blocks are precision-ground, hardened steel reference standards used to calibrate measuring instruments, set comparators, and verify dimensional tolerances on the shop floor or in a metrology lab. The Grade 0 classification indicates a high level of dimensional accuracy and flatness, making this block suitable for demanding inspection and calibration work. A Certificate of Inspection is included, providing traceable documentation of the block's measured dimensions at the time of manufacture.

This gage block is used in dimensional metrology applications across manufacturing, machining, and quality-control environments. It serves as a reference standard for calibrating micrometers, calipers, height gages, and CMM fixtures. Typical users include quality engineers, tool-and-die makers, and precision machinists working in environments where traceable measurement standards are required. It is suited for both production floor use and controlled metrology lab settings.

Key Features

• Grade 0 accuracy per ASME standards for high-precision metrology applications
• 100 mm nominal length in rectangular steel block form
• Hardened steel construction for dimensional stability and wear resistance
• Includes Certificate of Inspection for traceability documentation
• Rectangular form factor compatible with standard gage block accessories and holders

Compatibility

Designed as an OEM-style precision reference standard for use with standard gage block sets, holders, and accessories conforming to ASME gage block specifications.

Installation Notes

Gage blocks are handled and used by metrology technicians and quality-control professionals. Store blocks in a clean, controlled environment and allow them to thermally stabilize before use. When wringing blocks together or setting comparators, ensure mating surfaces are clean and free of debris to prevent damage to the lapped faces. Periodic recalibration against a national standard is recommended to maintain traceability.