Fittings measurements and how to measure

Choosing the correct fitting starts with identifying the connection type and checking its dimensions. If you are unsure, please contact us before ordering.

What to check

• The connection type at each end: RJT, DIN, Tri-Clamp, BSP, SMS or hosetail.
• Whether each threaded connection is male or female.
• The tube outside diameter, relevant connection dimensions and required overall length, in millimetres.
• For adaptors, the size and connection type of both ends.

Use callipers where possible and send clear photos showing the fitting, its mating connection and your measurements if you need help.

Measurement guides and videos

These are the reference links from our previous website:

• Measuring Tri-Clamp fittings — The Metal Company
• Measuring RJT fittings — The Metal Company
• BSP fittings measurement guide — HTS Spares
• Concentric and eccentric reducers explained — The Metal Company

Before you order

Check both ends against the selected product variant. If you cannot identify the connection, email enquiries@milkyfittings.co.uk with photos and dimensions. We can help confirm what you need or discuss a bespoke fitting.

Please also read our Returns & Refunds policy.