Subject:Head bolt nut size Date:Thu Oct 26 12:51:40 2017
Ok folks, here comes another strange or "Dumb" question. I recently picked up a 1954 ST 165. The Head was of the bike laying in a box but the nuts for the studs were missing. I bought a new head gasket and went to put it on but can't find an S.A.E. nut that fits. I thought they were 5/16" fine thread...won't go on. 5/16" course...won't go on. I finally found that am 8mm X 1.0 nut rolls right on each stud. I thought that all fasteners on these were standard not metric? If they are all standard, what size nut should go on it?

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