How to Order
1. Select gage model
2. Select contact points

131 Series Models and Specifications
| Indicator Type | Graduation | Model Number |
| Dial | 0.0005″ | 131-601 |
| Dial | 0.0001″ | 131-602 |
| Dial | 0.010 mm | 131-603 |
| Dial | 0.002 mm | 131-604 |
| Electronic | 0.0005″ 0.010 mm | 131-701 |
| Electronic | 0.0001″ 0.001 mm | 131-702 |
| Without | — | 131-800 |
131 Series Contact Point Specification
| Measuring Depth Range | ID Range | OD Range | Contact Point Type | Order Number |
| 0.080″–2.50″ | 0.760″–7.970″ | 0–7.220″ | hardened steel taper foot | 131-650 |
| 0.050″–2.50″ | 0.760″–7.970″ | 0–7.220″ | 0.375″ C ball | 131-651 |
| 0.050″–2.50″ | 0.760″–7.970″ | 0–7.220″ | 0.375″ 1/2 C ball | 131-652 |
| 0.025″–2.50″ | 1.020″–8.100″ | 0–7.100″ | 0.050″ x 0.050″ HC Disc | 131-653 |
| 0.025″–2.50″ | 2.020″–8.600″ | 0–6.600″ | 0.050″ x 1.000″ HC Disc | 131-654 |
| 1.00″–2.500″ | 1.100″–8.300″ | 0–6.600″ | 0.188″ Ø ruby or C ball with 4-48 thread | 131-655 |