WEATHERHEAD

The 7000 Series Ermeto and Ermeto Flareless are both flareless bite-type compression fitting families from Weatherhead. The 7000 Series Ermeto typically includes nuts, plugs, and other components that are part of the complete fitting assembly. The Ermeto Flareless series includes adapters, elbows, tees, and other shaped fittings that use the same bite-type principle. Both series are designed for metal tubing and create a seal by biting into the tube surface without requiring a flare. The specific part number determines the exact configuration, tube OD, and thread size. In practice, they are often used together in the same system, with the 7000 Series providing the nut and the Ermeto Flareless providing the body or adapter. Always refer to the manufacturer part number for compatibility.

Weatherhead flareless bite-type compression fittings are available for a range of tube outside diameters. From the products supplied by 3G Electric, sizes include 1/8 in, 3/16 in, 5/16 in, 3/8 in, 1/2 in, 3/4 in, and 7/8 in OD tubing. The corresponding thread sizes vary by tube OD and fitting type. For example, a 1/8 in OD tubing nut has a 5/16"-24 thread, while a 7/8 in OD tubing nut has a 1 3/16"-12 thread. Adapters and shaped fittings may have different thread combinations on each end, such as 1/2-20 x 1/4-18 or 3/4-16 x 9/16-18. The catalog includes 63 SKUs, so not every possible size combination is listed, but the range covers common industrial tubing sizes.

Yes, Weatherhead flareless bite-type compression fittings are used in both hydraulic and pneumatic tubing systems. The steel construction and bite-type design are intended for leak-tight connections on metal tubing. They are commonly found in hydraulic circuits, lubrication lines, and pneumatic control systems. The fittings are not limited to these applications; they can also be used in general industrial fluid transfer where the tube material and pressure ratings are compatible. The actual pressure rating depends on factors such as tube wall thickness, material, and proper assembly. Weatherhead publishes pressure ratings for their fittings, and users should consult those specifications for the specific part number and tubing used. 3G Electric provides the series and thread information to help identify the correct component.

The Weatherhead 7000 Series Ermeto compression nut for 1/8 in OD tubing has a thread size of 5/16"-24. This corresponds to manufacturer part number 7105X02T, which is a steel compression fitting nut. The nut is part of a flareless bite-type connection and is used to compress the ferrule onto the tube. The 5/16"-24 thread is a UNF thread, common in instrumentation and small hydraulic lines. When replacing or specifying this nut, ensure the tube OD is 1/8 in and the mating body has a 5/16"-24 port. The same series includes nuts for other tube sizes, such as 3/16 in OD with a 3/8"-24 thread (MPN 7105X03T).

Weatherhead flareless bite-type compression fittings are typically designed for use with metal tubing, including steel and stainless steel. The bite-type design creates a mechanical grip by cutting into the tube surface, which requires the tube to be sufficiently hard and ductile. Stainless steel tubing is commonly used with these fittings in corrosive or high-purity applications. However, the specific compatibility depends on the tube material, wall thickness, and hardness. Weatherhead provides guidelines for tube selection and assembly. For stainless steel tubing, it is important to use the correct ferrule and follow the recommended tightening procedure to ensure a proper seal. The fittings supplied by 3G Electric are steel, which is compatible with stainless steel tubing in many industrial settings, but users should verify with Weatherhead's technical data for the specific application.

3G Electric's Weatherhead catalog includes 63 SKUs across several product families. The primary family is flareless bite-type steel compression fittings from the 7000 Series Ermeto and Ermeto Flareless series. These include compression nuts, plugs, adapters, elbows, and tees. The catalog also lists quick-connect couplings, needle valves, and hydraulic flange fittings. The compression fittings cover tube ODs from 1/8 in to 7/8 in and various thread sizes. Quick-connect couplings are used for rapid connection and disconnection of fluid lines. Needle valves provide fine flow control in hydraulic and pneumatic systems. Hydraulic flange fittings are used for larger connections, often in high-pressure circuits. The specific part numbers and specifications are available in the product listings.