Specification
- American Specifications: ANSI / ASME B1.5 : 1997
Manufacturing Range :
- Thread Plugs , Thread Rings, Check Plugs & Wear Check Plugs of Diameter from 1/4" to 12" and TPI from 16 to 3.
| Gauge Type | Diameter Range (Inch) | TPI | Tolerance Class |
| Thread Plug Gauges. | 1/4 - 5 Above 5 up to 12 Diameter can be supplied based on customer request. |
16, 14, 12, 10, 8, 6, 5, 4, 3 TPI not covered here can be supplied based on customer request. | 2G, 3G & 4G 2C, 3C & 4C |
| Thread Ring Gauges. | 1/4 - 5 Above 5 up to 10.2 Diameter can be supplied based on customer request. |
16, 14, 12, 10, 8, 6, 5, 4, 3 TPI not covered here can be supplied based on customer request. | 2G, 3G & 4G 2C, 3C & 4C |
| Plain Plugs to check Minor Diameter of Internal Threads |
To cover above Diameter range. | ||
| Plain Rings to check Major Diameter of External Threads |
To cover above Diameter range. | ||
| Check Plug Gauges | To check NEW Go & Nogo Ring Gauges as given above. | ||
| Wear Check Plug Gauges | To check / calibrate USED Go & Nogo Ring Gauges as given above. | ||
Tolerance Class
'G' is the most commonly used Tolerance Class. Many times class 'C' is also used as per designer's requirement. '3G' class is used for general purpose assemblies while classes above 3 are progressively closer tolerance classes like 4G, 5G etc. and are suitable for loose fit. Example - '2G' class.