Mitutoyo
Mitutoyo 611212-541 Gage Block .25 in Steel AS-1
Steel rectangular gauge block, 0.25 in nominal size, AS-1 grade to ASME standards, includes Certificate of Inspection
- TypeMicrometers
- Grade AS-1 accuracy backed by ASME standard
- 25 in nominal size for precise calibration
- Steel construction resists wear in shop use
- Rectangular 1 3/16 in by 23/64 in face
- Includes Certificate of Inspection for traceability
Precision Gage Block for Metrology
The Mitutoyo 611212-541 is a rectangular steel gage block with a nominal size of .25 in. It meets ASME AS-1 grade tolerances and includes a Certificate of Inspection. This block serves calibration labs and machine shops that require traceable length standards.
Grade AS-1 Tolerance Defines Suitability
Length tolerance ranges from -0.0120 in to 0 in, while width tolerance spans -0.0080 in to -0.0020 in. These limits determine whether the block satisfies a specific inspection requirement. Users needing tighter or looser grades must select a different classification.
Simple Handling with Standard Precautions
The block measures 1 3/16 in face length by 23/64 in face width and has no central hole. Wringing surfaces must be clean and free of burrs before use. Improper storage or contact with corrosive agents can degrade the certified accuracy over time.
Highlights
- Grade AS-1 accuracy backed by ASME standard
- 25 in nominal size for precise calibration
- Steel construction resists wear in shop use
- Rectangular 1 3/16 in by 23/64 in face
- Includes Certificate of Inspection for traceability
Specifications
| Brand | MITUTOYO |
|---|---|
| Type | Micrometers |
Questions about this item
What does the .25 in nominal size mean when the block is wrung in a stack?
The block contributes exactly one quarter inch to the total stack height; its Grade AS-1 tolerance of minus .0120 in to zero on length keeps the accumulated error within the limits required for inspection-grade setups.
How does the ASME AS-1 grade cap the usable accuracy of this gage block?
AS-1 defines the tightest commercial tolerance band; length may only fall short by up to .0120 in and width by .0080 in to .0020 in, so the block remains suitable for calibrating measuring instruments and setting masters.
Will the 1 3/16 in by 23/64 in rectangular faces fit my standard gage block holder?
Yes — the face length of 1 3/16 in and face width of 23/64 in match the conventional rectangular gage block envelope used in most inch-system holders and accessories.
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