THREADS:
SAE, METRIC ISO 6149, BSPP JIS 2351

For adjustable positioning, O.Ring and back-up washer should be in proper position on non threaded section nearest to locknut. Lubrification of O.Ring is recommended.

Screw fitting by hand into straight thread port until back-up washer contacts face of port.

To position fitting, unscrew up to one full turn then hold fitting in desired position and tighten locknut until back-up washer contacts face of port and force O.Ring within port cavity.