Mitutoyo 611188-541 Steel Gage Block 0.148 in Grade AS-1

Product Description

The MITUTOYO 611188-541 is a rectangular steel gage block with a nominal length of 0.148 inches and an accuracy grade of AS-1, the highest grade recognized under ASME standards. Gage blocks serve as dimensional reference standards used to calibrate measuring instruments, set comparators, and verify tolerances on precision machined components. This block ships with a Certificate of Inspection, providing documented traceability to measurement standards. It is a single-piece block intended for metrology labs, tool rooms, and precision manufacturing environments where verified dimensional accuracy is required.

This gage block is suited for use in tool rooms, quality control departments, and metrology labs supporting precision manufacturing in industries such as aerospace, automotive, and general machining. Its AS-1 accuracy grade makes it appropriate for calibration and reference applications where tighter tolerances are demanded compared to lower-grade inspection blocks. Licensed calibration technicians, machinists, and quality control professionals are the primary users of this type of reference standard.

Key Features

• Grade AS-1 accuracy per ASME standards, suitable for calibration and high-precision reference work
• Nominal length of 0.148 inches in a rectangular form factor
• Steel construction provides dimensional stability and durability in shop and lab environments
• Includes Certificate of Inspection for measurement traceability documentation
• Single-piece packaging with a minimum order quantity of one

Compatibility

Designed as an OEM-style reference standard for use with gage block sets, comparators, and calibration fixtures that accept rectangular steel gage blocks conforming to ASME grade AS-1 specifications.

Installation Notes

Gage blocks are handled and stored by calibration technicians and precision measurement professionals. Before use, clean the gaging surfaces with a lint-free cloth and an appropriate solvent to remove oils and contaminants that can affect wringing and accuracy. Store blocks in their original case away from temperature extremes and humidity to prevent corrosion and dimensional drift. Do not drop or slide blocks across abrasive surfaces, as damage to the lapped faces will compromise accuracy.