GF3590012 is a steel 90° pump-flange elbow with a four-hole square flange and a 1/2" BSP fluid port. The flange mounting arrangement and the threaded fluid connection are shown separately in the section drawing.
The source lists the included screw set as 2 × M6×35 / 2 × M6×20* and the included O-ring as 18.72 × 2.62. The A, B, C, D, G and L letters identify drawing dimensions; they do not name additional fluid ports.
The sheet does not state a working-pressure rating or a pump group. Numerical drawing dimensions and the O-ring designation have no explicit unit legend, so their units remain unresolved. The flange-interface description does not establish an OEM manufacturer.
