Mitutoyo 611177-531 Steel Gage Block 0.137 in Grade 0

Product Description

The MITUTOYO 611177-531 is a rectangular steel gage block measuring 0.137 inches, manufactured to Grade 0 accuracy. Gage blocks are precision-ground reference standards used to calibrate measuring instruments, set comparators, and verify dimensional tolerances in machining and inspection environments. This block meets ASME standards and ships with a Certificate of Inspection, confirming it has been checked against traceable standards before leaving the factory. Grade 0 tolerance is tighter than Grade 1 and Grade AS-1, making this block suitable for inspection-room and toolroom applications where close dimensional control is required.

This gage block is used in metrology labs, tool cribs, and quality control departments across manufacturing, aerospace, automotive, and general machining facilities. A single 0.137-inch block covers setups requiring that specific decimal dimension or contributes to a combination stack. Machinists, metrologists, and quality technicians are the primary users. It is appropriate for both standalone reference use and as part of a larger gage block set being filled out or replaced piece by piece.

Key Features

• Grade 0 accuracy per ASME standards for tight tolerance inspection work
• 0.137-inch nominal size, precision-ground steel construction
• Includes Certificate of Inspection for traceability documentation
• Rectangular form for stable stacking and wringing with other gage blocks
• Sold individually, allowing single-block replacement or set supplementation

Compatibility

Designed as an OEM-style replacement or supplemental piece for rectangular steel gage block sets requiring a 0.137-inch Grade 0 block conforming to ASME standards.

Installation Notes

Gage blocks are handled by metrology technicians and quality control personnel, not installed in the field sense. Store blocks in a clean, dry environment and allow thermal stabilization before use. Clean contact faces with an appropriate gage block cleaning solution and lint-free cloth before wringing. Never drop or stack blocks carelessly, as nicked or corroded faces will compromise accuracy.