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Measured your thread in millimetres? Enter the mm value and instantly see the matching BSP size in inches — or pick your inch size the other way around. Including the right fitting.
First indicate whether you're measuring male or female thread.
BSP stands for British Standard Pipe, a widely used thread type for pipes and fittings. The threads run parallel to the axis of the pipe — which is why BSP is also called parallel thread. There are two variants: BSPP (parallel) and BSPT (tapered). You'll mainly find BSP in water and gas lines, hydraulics and pneumatics.
Measure with a calliper, placed on (not between) the thread. Measure male thread on the outside, female thread on the inside. Enter your measured value above and you'll instantly know the matching BSP size.
| Inch size(inch) | Outside(mm) | Inside(mm) | Outside(inch) | Inside(inch) |
|---|
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