Fittings

Tube fitting consist of three main parts, namely fitting body, coupling nut and a ferrule (which is also termed as cutting ring, progressive ring etc). Tube fittings are suitable for metric size tubes. Imperial size tube fittings are also manufactured by hyloc. Contact our Marketing and sales team for further details.

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Original Metric fitting design is based on German standard. i.e. DIN 2353. Later International Standards Organization formed a technical committee and released a standard as ISO 8434 as a basic standard. Tube fittings as a broad term used by different industries with different fitting arrangement based on the application.

Many types are tube fitting designs are available as mentioned below;
* Ferrule type / Flare less
* Weld on nipples
* 37º flared fittings
* O-ring face seal fittings

ISO has released different standards for all above types of tube fittings.

The design of tube fitting body, coupling nut and ferrules are based on ISO standards. The dimensions and the requirements are well defined by these standards. Some of the key parameters of the fitting design are left to the manufacturer to have their choice of design specifications. Tube fitting body has 24 º cone with excellent surface finish for to get lower friction during assembly and with a provision to receive a tube with metric threads. Coupling nut has also metric internal threads with a support flange inside to drive the ferrule during assembly process.

Hyloc Ferrule design is very special in its geometry and metallurgy. The design has TWIN cutting edges which firmly grips the tube after assembly thereby creates a leak proof joint. Hyloc has such tube fittings in many sizes and different configurations.