Mitutoyo 611183-531 Steel Gage Block 0.143 in Grade 0

Product Description

The MITUTOYO 611183-531 is a rectangular steel gage block ground to a nominal length of 0.143 inches and certified to Grade 0 accuracy. Gage blocks serve as primary length reference standards used to calibrate measuring instruments, set comparators, and verify dimensional tolerances on the shop floor or in the metrology lab. This block meets ASME standards and ships with a Certificate of Inspection, making it suitable for quality control programs that require documented traceability. Grade 0 blocks fall within tight tolerance bands that satisfy demanding inspection requirements in precision manufacturing environments.

This gage block is used in metrology labs, tool rooms, and quality inspection departments across manufacturing, machining, and precision fabrication operations. It is appropriate for calibration of micrometers, height gages, dial indicators, and similar measuring instruments. Individual blocks like this one are also used to build up specific dimensions when used in combination with a matched gage block set. Both metrologists and skilled machinists working in close-tolerance environments rely on Grade 0 blocks for verification work.

Key Features

• Grade 0 accuracy per ASME standards, suitable for precision calibration and inspection work
• Rectangular steel construction provides durability and dimensional stability over repeated use
• Nominal length of 0.143 inches ground to tight tolerance for reliable reference measurements
• Includes Certificate of Inspection for quality-system traceability documentation
• Single-block packaging allows replacement of individual blocks without purchasing a full set

Compatibility

Designed as an individual OEM-style replacement or supplemental block compatible with standard rectangular gage block sets used in ASME-compliant metrology and inspection applications.

Installation Notes

Gage blocks are handled and stored by metrology technicians and quality inspection personnel, not installed with tools. Clean block surfaces with an appropriate lint-free cloth and approved solvent before use to prevent contamination and corrosion. When wringing blocks together, apply light lateral pressure to form a molecular adhesion bond rather than forcing surfaces together. Store blocks in their protective case and apply a light coat of rust-preventive oil when not in use to maintain surface integrity.