SAE O-Ring Adapters
SAE O-ring adapters are used to close straight threaded tubing systems. As with other SAE O-ring fittings in the static design application, it provides a seal between two mating components. Unlike most SAE o-ring fittings, they do not fit fully into a ring or neck. Male threaded tube fittings have a grooved part with a radius that holds the o-ring.
Mating parts, such as regular or cylindrical ports, typically have chamfered faces that compress the SAE O-rings diagonally. Two straight wires to make sure the tube connection is secure, the compression o-ring is almost complete.
O-Ring Adapter Seals
SAE O-ring adapters and fittings are typically used in high-pressure applications, therefore hardness 90 NBR or FKM O-rings are typically specified. However, they can be produced in a variety of hardnesses and most rubber gasket polymers.
English / American system
Many US military and industrial specialists describe the design of fittings and flanges as well as o-rings. Most of the related o-rings now fall under the AS 568 o-ring specification and are referred to as -9 (XX) series o-rings. With the exception of -901, the last two digits of the o-ring slide indicate the size (1 / 16th of an inch) that will fit and seal in use. Thus, O-rings -906 are used for 3/8 “OD tube fittings and -916 is used for 1” OD tube fittings. O-rings are specified for use with tube fittings up to 2 “OD.
O-Ring Fittings measures
One of the most common uses is defined by ISO 6149. This special section describes the design of the fitting, port, and O-ring. Unlike the US system, the ISO 6149 size is defined by the port thread size, not the OD tube. Thirteen sizes have been defined, from M8 x 1 to M60 x 2.