Not sure which fitting you need? Tell us what you have, we show you what screws onto it — live prices and stock.
Pipe thread chart: inch / mm conversion (BSP, 15/21, 20/27, S60x6)
A “1/2 inch” thread measures 20.96 mm, not 12.7: in plumbing, the inch size is not converted, it is read from a chart. Here you will find the inch / mm correspondence of every common thread (BSP or “gas thread”, French names 15/21 · 20/27 · 26/34, NPT, S60x6 IBC tanks, Guillemin, Camlock, PVC), a tool that identifies your thread and the fitting that goes with it, and the pitfalls to avoid.
Which thread do you have? Which fitting do you need?
No need to know the name of your thread. Tell us what you need to connect to, or type what you know (“20/27”, “3/4 inch”, “S60x6”, “26.4 mm”): we identify the thread and show you the fittings that go with it. Dimensions according to ISO 228, ISO 7 and ASME B1.20.1.
✔ Shipped next working day from our stock✔ 4.5/5 from more than 6,400 customer reviews✔ Not sure? Describe what you need, we will find the fitting with you⎙ Printable thread gauge (PDF, actual size)
No need to know the name of your thread. Just answer the question: what do you need to connect to?
With a caliper, measure the outside diameter of a male (thread visible on the outside) or the inside diameter of a female (thread inside the hole), at the root of the thread.
The Guillemin symmetric half coupling with lock (Reference: 101338) in copper alloy offers a reliable and secure connection for professional applications. Fitted with a male BSP thread , this coupling is designed to withstand the stresses of suction and discharge in demanding industrial environments. Ideal for fire...
The Guillemin symmetric half coupling with lock (Reference: 101338) in copper alloy offers a reliable and secure connection for professional applications. Fitted with a male BSP thread , this coupling is designed to withstand the stresses of suction and discharge in demanding industrial environments. Ideal for fire...
The Guillemin male symmetrical half coupling without lock (Ref: 101316) from Multitanks is made from premium copper alloys for demanding professional applications. Equipped with a BSP thread (British Standard Pipe), it ensures a reliable connection for both suction and discharge. Specially adapted for fire services,...
The Guillemin male symmetrical half coupling without lock (Ref: 101316) from Multitanks is made from premium copper alloys for demanding professional applications. Equipped with a BSP thread (British Standard Pipe), it ensures a reliable connection for both suction and discharge. Specially adapted for fire services,...
Guillemin symmetrical female half coupling without lock in high-quality copper alloys. Designed with BSP gas thread tapping for a reliable and leak-proof connection. Ideal for fire brigades, industry and agriculture, usable in both suction and discharge. Corrosion-resistant materials ensuring a long service life under intensive use.
Guillemin symmetrical female half coupling without lock in high-quality copper alloys. Designed with BSP gas thread tapping for a reliable and leak-proof connection. Ideal for fire brigades, industry and agriculture, usable in both suction and discharge. Corrosion-resistant materials ensuring a long service life under intensive use.
Female Guillemin symmetric half coupling with lock in high-quality copper alloy. Designed for professionals in fire services, industry and agriculture. BSP gas thread for secure connection. Compatible with suction and discharge. Corrosion-resistant material for intensive use in professional environments.
Female Guillemin symmetric half coupling with lock in high-quality copper alloy. Designed for professionals in fire services, industry and agriculture. BSP gas thread for secure connection. Compatible with suction and discharge. Corrosion-resistant material for intensive use in professional environments.
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