To provide a common link between shore hydrants and ship’s fire mains.
Situated in such a position as to be easily accessible to fire brigade officers. Example : Near top of the accommodation ladders or mates office.
| Outside diameter | 178 mm |
| Inside diameter | 64 mm |
| Bolt circle diameter | 132 mm |
| Slots in flange | 4 holes, 19 mm in diameter |
| Flange thickness | minimum 14.5 mm |
| Bolts and nuts | 4 nos., each 16 mm in diameter, 50 mm in length |
| Washer’s | 8 nos. |
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