The 6H31459000 Valve Seat Assy can be ordered. View linked machines. 6H3-14590-00-00 is the manufacturercode.
The Valve Seat Assy appears in these Pro 50h 1987 parts lists:
CLIP | 6631415900
CAP | 6761496600
PIN, VALVE | 6761418600
| 6H51494815
JET, MAIN (#130) | 6761494333
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