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.
This Guillemin symmetrical cap in copper alloys with lock and chain is specially designed for demanding firefighter and industrial applications. Its robust design guarantees perfect sealing and optimal security thanks to its integrated locking system. Ideal for protecting your...
This Guillemin symmetrical cap in copper alloys with lock and chain is specially designed for demanding firefighter and industrial applications. Its robust design guarantees perfect sealing and optimal security thanks to its integrated locking system. Ideal for protecting your...
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.
The Guillemin symmetrical half-fitting with corrugated copper alloy bushing is the reference solution for crimping technical pipes in corrosive environments. Robust and versatile, this "firefighter" fitting is compatible with suction and discharge in the oil, chemical and agricultural industries. Its bronze or...
The Guillemin symmetrical half-fitting with corrugated copper alloy bushing is the reference solution for crimping technical pipes in corrosive environments. Robust and versatile, this "firefighter" fitting is compatible with suction and discharge in the oil, chemical and agricultural industries. Its bronze or...
Guillemin Symmetric Half Coupling with reduced annular socket in copper alloys, designed to be crimped onto flexible hoses. Compatible with various crimping systems: drawn ferrules, trunnion clamps, metal banding and serrated ferrules. Ideal for firefighting and demanding industrial applications (oil,...
Guillemin Symmetric Half Coupling with reduced annular socket in copper alloys, designed to be crimped onto flexible hoses. Compatible with various crimping systems: drawn ferrules, trunnion clamps, metal banding and serrated ferrules. Ideal for firefighting and demanding industrial applications (oil,...
Guillemin firefighter symmetric half coupling with reduced annular socket and flange in professional-grade copper alloy. Designed for crimping onto hoses with various systems: pressed ferrules, trunnion clamps, band crimping or serrated ferrules. A robust and reliable solution for demanding industrial applications: petroleum, chemicals,...
Guillemin firefighter symmetric half coupling with reduced annular socket and flange in professional-grade copper alloy. Designed for crimping onto hoses with various systems: pressed ferrules, trunnion clamps, band crimping or serrated ferrules. A robust and reliable solution for demanding industrial applications: petroleum, chemicals,...
The lockable symmetrical Guillemin cap from Multitanks offers optimal protection for your fire department fittings and irrigation systems. Made from resistant copper alloys , it guarantees perfect sealing and exceptional durability. Equipped with a security...
The lockable symmetrical Guillemin cap from Multitanks offers optimal protection for your fire department fittings and irrigation systems. Made from resistant copper alloys , it guarantees perfect sealing and exceptional durability. Equipped with a security...
The Guillemin symmetrical reduction coupling with locks in copper alloys (Reference: 101391) is designed to connect hoses of different diameters in professional applications. Made from high-quality brass, it ensures perfect sealing and exceptional corrosion resistance. Its secure locks ensure quick and reliable assembly, ideal for...
The Guillemin symmetrical reduction coupling with locks in copper alloys (Reference: 101391) is designed to connect hoses of different diameters in professional applications. Made from high-quality brass, it ensures perfect sealing and exceptional corrosion resistance. Its secure locks ensure quick and reliable assembly, ideal for...
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