- For checking calipers accuracy
- Gauge blocks are made of alloy steel
| Code | Quantity | Grade | Gauge block allocation |
| 517-005-01 | 5 pcs | 1 | 30,41.3,131.4mm |
| 517-006-01 | 5 pcs | 1 | 30,41.3,131.4,243.5mm |
| 517-012-01 | 12 pcs |
0 | 10,20,20,41.2,51.2,81.5,101.2,
121.5,121.8,191.8,201.5,291.8mm |
| 517-012-02 | 12 pcs | 1 | 10,20,20,41.2,51.2,81.5,101.2,
121.5,121.8,191.8,201.5,291.8mm |
| 512-012-03 | 12 pcs | 2 | 10,20,20,41.2,51.2,81.5,101.2,
121.5,121.8,191.8,201.5,291.8mm |
