Collection: Galvanised Threaded Fittings
Galvanised malleable iron fittings (Gal Mal) are rugged cast iron fittings coated with zinc to reduce corrosion.
BSP thread sizes are based on the nominal inside diameter (ID) of the pipe on which they are used. This causes much confusion when the thread is measured. Particularly where metric conversion is concerned.
The Chart below is utilised by measuring the (male) thread at its widest point.
| METRIC SIZE mm | IMPERIAL SIZE (BSP) inch | MEASURED OD in mm |
| 6 | 1/8 | 9.73 |
| 8 | 1/4 | 13.6 |
| 10 | 3/8 | 16.66 |
| 15 | 1/2 | 20.99 |
| 20 | 3/4 | 26.44 |
| 25 | 1 | 33.25 |
| 32 | 1-1.4 | 41.91 |
| 40 | 1-1/2 | 47.80 |
| 50 | 2 | 59.61 |
| 65 | 2-1/2 | 75.18 |
| 70/80 | 3 | 87.88 |
| 100 | 4 | 113.03 |
| 125 | 5 | 138.43 |
| 150 | 6 | 163.83 |
