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    Bolt threads

    "Could someone please tell me "Could someone please tell me what threads are used on a 1988 Evinrude. Are they UNC? Here in the UK our old, pre metric threads are BSW, BSF etc. I've seen mention in postings of bolts such as No. 8 1/4-20, is this a grade for the "8" 1/4 inch at 20 tpi and is...
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