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These Hansen Large Back Nuts are often used with rubber washers to create a water-tight seal on a wall or similar. Screws onto BSP threads.
| Suits BSP thread | Part No. |
|---|---|
| 3/4" | SBNL 20B |
| 1" | SBNL 25B |
| 1 1/4" | SBNL 32B |
| 1 1/2" | SBNL 40B |
| 2" |
SBNL 50B |
Approx BSP to metric thread equivalent
3/4" = 20mm 1" = 25mm 1 1/4" = 32mm 1 1/2" = 40mm 2" = 50mm
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