Mitutoyo 611194-531 0.400 in Grade 0 Steel Rectangular Gage Block
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The Mitutoyo 611194-531 is a new, individual rectangular steel gage block with a nominal length of 0.400 in (0.4 in), manufactured to ASME Grade 0 (equivalent to DIN/ISO Grade 1) accuracy per ASME B89.1.9-2002. Material is steel with a coefficient of thermal expansion of (6.3±0.3)×10⁻⁶/°F [(11.3±0.5)×10⁻⁶/°K], and the block is lapped and finished to wringing-quality flatness and parallelism on its measuring faces. Per the included Certificate of Inspection (serial 260154, cert T26C04567, dated 13 Mar 2026), the central deviation is +2.0 µin, maximum deviation +2.0 µin, minimum deviation +0.8 µin, and variation 1.2 µin — all traceable to NMIJ/AIST through JCSS, equivalent to NIST and PTB via CIPM MRA. Expanded measurement uncertainty is ≤2.4 µin for lengths 4 in and under. This block is used as a precision dimensional reference for calibrating micrometers, calipers, CMMs, comparators, and other measurement instruments in quality control, toolroom, and metrology laboratory applications.
Product Specifications
| Brand | Mitutoyo |
| MPN | 611194-531 |
| Nominal Length | 0.400 in |
| Accuracy Grade | Grade 0 (ASME B89.1.9-2002) |
| Material | Steel |
| Shape | Rectangular |
| Unit System | Inch |
| Serial / Ident No. | 260154 |
| Central Deviation | +2.0 µin |
| Maximum Deviation | +2.0 µin |
| Minimum Deviation | +0.8 µin |
| Variation | 1.2 µin |
| Expanded Uncertainty (≤4 in) | 2.4 µin (k=2) |
| Coefficient of Thermal Expansion | 6.3±0.3×10⁻⁶/°F; 11.3±0.5×10⁻⁶/°K |
| Inspection Standard | ASME B89.1.9-2002 |
| Traceability | NMIJ/AIST via JCSS; NIST & PTB equiv. (CIPM MRA) |
| Inspection Method | By comparator |
| Certificate of Inspection | Included (T26C04567, dated 13 Mar 2026) |
| Condition | New |