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 Multitanks 40-63mm tightening wrench is the essential tool for handling your compression fittings and PVC valves with complete simplicity. Made from durable plastic, it perfectly adapts to diameters from 40 to 63mm and guarantees precise tightening without damaging your equipment. Ideal for pool circuits, automatic irrigation systems...
The Multitanks 40-63mm tightening wrench is the essential tool for handling your compression fittings and PVC valves with complete simplicity. Made from durable plastic, it perfectly adapts to diameters from 40 to 63mm and guarantees precise tightening without damaging your equipment. Ideal for pool circuits, automatic irrigation systems...
Simplify the opening and closing of your drums with this multi-function nylon wrench . Highly versatile, it is compatible with DIN 51, 61, 71 and M55 plugs. Its robust nylon design offers superior mechanical strength while protecting your...
Simplify the opening and closing of your drums with this multi-function nylon wrench . Highly versatile, it is compatible with DIN 51, 61, 71 and M55 plugs. Its robust nylon design offers superior mechanical strength while protecting your...
Professional plastic tightening wrench designed specifically for assembly and disassembly of compression fittings and PVC valves with diameters from 75 to 110mm. Essential for your pool, automatic irrigation and fluid circuit installations. Ergonomic grip and optimal resistance for precise tightening without damaging your...
Professional plastic tightening wrench designed specifically for assembly and disassembly of compression fittings and PVC valves with diameters from 75 to 110mm. Essential for your pool, automatic irrigation and fluid circuit installations. Ergonomic grip and optimal resistance for precise tightening without damaging your...
Baby Boa Constrictor strap key with 100mm max diameter. Allows you to tighten and loosen almost everything, regardless of form. Easily wraps around any shape, regardless of material and without scratches
Baby Boa Constrictor strap key with 100mm max diameter. Allows you to tighten and loosen almost everything, regardless of form. Easily wraps around any shape, regardless of material and without scratches
IBC 1000 L accessories 
Heating jackets 
Fittings 
Drums, jerrycans & fittings 
Seeds 
Plant protection & biocides 
Garden 
Green spaces & municipal 
Barbecue, fire pit & fireplace 
Cleaning & care 
Refrigerants & air conditioning 
Watering 
