Specification
- Basic Dimensions- BS 84-2007 & Gauging Practice: BS 919 Part II - 2007
Manufacturing Range :
- Thread Plug & Ring Gauges from Diameter 1/8 to 6" , TPI 40 to 2.5
| Dia Inch | BSW | BSF | BSB | Type of Thread Gauges used | ||||
| 1/8 | 40 | - | 26 | Thread Plug Gauges. | Plain plugs to check tapped holes/ minor diameter |
Thread Ring Gauges. |
Check Plug Gauges to Check New Rings. |
Wear Check Plug Gauges to Check / Calibrate used Rings. |
| 3/16 | 24 | 32 | 26 | |||||
| * 7/32 | - | 28 | * | |||||
| 1/4 | 20 | 26 | 26 | |||||
| 5/16 | 18 | 22 | 26 | |||||
| 3/8 | 16 | 20 | 26 | |||||
| 7/16 | 14 | 18 | 26 | |||||
| 1/2 | 12 | 16 | 26 | |||||
| *9/16 | 12 | 16 | 26 | |||||
| 5/8 | 11 | 14 | 26 | |||||
| *11/16 | 11 | 14 | * | |||||
| 3/4 | 10 | 12 | 26 | |||||
| 7/8 | 9 | 11 | 26 | |||||
| 1 | 8 | 10 | 26 | |||||
| 1.1/8 | 7 | 9 | 26 | |||||
| 1.1/4 | 7 | 9 | 26 | |||||
| *1.3/8 | - | 8 | 26 | |||||
| .1/2 | (6) | (8) | 26 | |||||
| 1.3/4 | (5) | (7) | 26 | |||||
| 2 | (4.5) | (7) | 26 | |||||
| 2.1/4 | (4) | (6) | * | |||||
| 2.1/2 | (4) | (6) | * | |||||
| 2.3/4 | (3.5) | (6) | * | |||||
| 3 | (3.5) | (5) | * | |||||
| *3.1/4 | (3.25) | (5) | * | |||||
| 3.1/2 | (3.25) | (4.5) | * | |||||
| *3.3/4 | (3) | (4.5) | * | |||||
| 4 | (3) | (4.5) | * | |||||
| 4.1/2 | (2.875) | (4) | * | |||||
| 5 | (2.75) | - | * | |||||
| 5.1/2 | (2.625) | - | * | |||||
| 6 | (2.5) | - | * | |||||
Tolerance Class
| Internal Threads -Plug | External Threads - Rings |
| Medium Class | Medium Class |
| Normal Class | Free Class |
| Close Class | Close Class |
- Gauges of TPI in parenthesis are supplied in Truncated Form.
- We also manufacture Gauges of diameter & TPI combination not covered above (Whitworth), based on customer request.