"I just acquired a used Honda
"I just acquired a used Honda BF40A. The idle set screw would not turn, but I was able to get it out with vicegrips. Examination under a microscope shows the upper threads dorked up.
Does anyone have the part number and/or screw size to order a replacement set screw from Honda, or elsewhere? I assume it is metric, and appears to be a SS pan-head phillips. My caliper measurements show it to be 0.152" diameter (3.86 mm) to the outer threads, 0.193"/10 threads (0.5 mm pitch), and 0.550" (14 mm) length. That would make it a non-standard fine-pitch thread. On McMaster-Carr, I can get a 3mm diameteter with 0.5 mm pitch or a 3.5 mm diameter with 0.6 mm pitch. But no 3.5 mm diameter with 0.5 mm pitch."
"I just acquired a used Honda BF40A. The idle set screw would not turn, but I was able to get it out with vicegrips. Examination under a microscope shows the upper threads dorked up.
Does anyone have the part number and/or screw size to order a replacement set screw from Honda, or elsewhere? I assume it is metric, and appears to be a SS pan-head phillips. My caliper measurements show it to be 0.152" diameter (3.86 mm) to the outer threads, 0.193"/10 threads (0.5 mm pitch), and 0.550" (14 mm) length. That would make it a non-standard fine-pitch thread. On McMaster-Carr, I can get a 3mm diameteter with 0.5 mm pitch or a 3.5 mm diameter with 0.6 mm pitch. But no 3.5 mm diameter with 0.5 mm pitch."