Here’s the information for the part with GAP No. 903241:
Product Specification:
This part is specified with a brake stroke of 57, a push rod length of 200mm, and a push rod thread of 5/8″ – 18 UNF. The inlet thread is 3/8″ – NPTF, and it has a port angle of 90° and a clamp angle of 0°. The color of the part is specified as Black. The type number is not explicitly mentioned.