What are the specs of the No. 36 MKI filler plug? I've seen some in brass and some in what appears to be zinc.
Looking, it appears to be a slightly undersized 9/16-20 BSW thread from the two I measured. Anybody know the actual specs? I'd love to find original drawings? Any other info on inspectors markings would be appreciated.
Looking, it appears to be a slightly undersized 9/16-20 BSW thread from the two I measured. Anybody know the actual specs? I'd love to find original drawings? Any other info on inspectors markings would be appreciated.