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Appearance
The SAE 37° Flared tube fitting system (aka. "JIC") consists of three
components to make a tubing assembly: body, nut, and sleeve.
The SAE flared tube fitting relies on metal-to-metal contact between the finished
surface of the fitting nose and the inside diameter of the flared tubing to make a seal.
SSP takes great care in the manufacturing process to produce a flared nose surface that
far exceeds published specifications. This high finish reduces the likelihood of
leakage due to irregularities in the flared tubing.
As the fitting nose and flared tubing are drawn together, they are supported by the
fitting sleeve, which distributes the compressing load caused by the nut as it is
threaded onto the fitting body during assembly.
SAE flared tube fittings are available for inch and metric tubing. Metric assemblies
are constructed with standard inch bodies, and special nuts and sleeves designed for
metric tubing.
Stainless steel SAE flared tube fitting are manufactured from Type 316/316L stainless
steel. Brass SAE flared tube fittings are manufactured from CA377 forging brass,
and CA360 & CA345 machining brass. Monel® SAE flared tube fittings are manufactured
from the 405 grade of this nickel-copper alloy.
An installed SAE flared tube fitting system is easy to identify. The sleeve protrudes
out the back of the nut. This extension provides the tubing with additional support and
lessens the longitudinal load on the fitting nose.
Suggested Applications for SAE 37° Flared Tube Fittings
The SAE flared tube fitting is the most popular configuration of hydraulic fluid connector
in North America. While the SAE system is often used for joining tubing in a hydraulic
system, it is frequently also used on flexible plumbing systems (hose) as an end adapter
for female SAE swivels, which is the most common – and affordable – end connection on
hydraulic hose assemblies.
Until recently, the SAE flared tube fitting had a corresponding military specification, MIL-F-18866 which has now been superceded by SAE J514, but many ordinance system designs and designers still favor the SAE fitting out of convention and customer preference.
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