Specification
- ISO Standard: Basic Dimensions : ISO 7/1 : 1994 & Gauging Practice : ISO 7/2 : 2000
- BS & European standard : BS EN 10226 - 3 : 2005
- Indian Standard : Basic Dimensions : IS 554 : 1999 & Gauging Practice : IS 8999 : 2003
Manufacturing Range :
- Taper Fullform Thread Plug - Gauge No.1
- Taper Fullform Thread Plug with relief - Gauge No.2
- Parallel Fullform Ring - Gauge No. 3
- Taper Plain Ring - Gauge No.4.
- Taper Modified Thread form Check Plug - Gauge No.5
- Parallel Modified Thread form Check Ring - Gauge No. 6
- Size Range covered is from pipe diameter 1/16" to 6". Above 6" & up to 12" Diameter gauges are manufactured as per JIS B 0253 -1985 specification.
| Diameter (Inch) | TPI | Type of Gauges used for checking | |||||
| 1/16" & 1/8" | 28 | Taper Full form Thread Plug Gauge | Taper Full form Thread Plug Gauge with relief | Parallel Full form Thread Ring Gauge | Taper Plain Ring Gauge | Taper modified Thread form Check Plug Gauge | Parallel Modified Thread form Check Ring Gauge |
| 1/4" & 3/8" | 19 | ||||||
| 1/2" & 3/4" | 14 | ||||||
| 1",1.1/4",1.1/2",2"' | 11 | ||||||
| 2.1/2" ,3", 4", 5" ,6"* | |||||||
Sizes from 6” – 12” Pipe Diameter are covered in JIS B 0253-1985 specification, PT thread gauges. For details refer $ foot
| Internal Threads | Parameters to be checked | Pitch Dia. with Major Diameter | Accommodation Length | |
| Taper Rc | Gauges required - | Gauge No.1 and/or 2 | Gauge No.2 | |
| Parallel Rp | Gauge No.1 and/or 2 | Gauge No.2 | ||
| External Threads | Parameters to be checked | Pitch & Minor Diameters. | Accommodation Length | Major Diameter |
| Always Taper 'R' | Gauges required - | Gauge No.3 | Gauge No.4 | Gauge No.4 |