The 12J63 coupling and the component parts conform to the requirements of the applicable Aerospace Standard AS1710 series.
The 12J63 is a variable cavity type coupling, designed for connecting flanged tube ends. This configuration provides weight savings because the overall width is substantially reduced.
Load Retention Safeguard
All pressure loads are retained by the split retainer that keeps the two tube ends from separating. This provides an extra safety factor, because in the unlikely event of a failure of the split retainer the pressure load would be picked up and retained by the nut and coupler shoulder.
The coupling can be retightened at any time in service to increase sealing pressure on coupling seals.
The coupling will provide a minimum ¼" axial adjustment and a maximum of ±4° angular misalignment.