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<blockquote data-quote="tatty500" data-source="post: 68441" data-attributes="member: 2532"><p>I bet the original screws were a non BSI preferred length.</p><p>The thing with countersunk screws is that the length includes the head. The plate is 5/16 so there is only 3/16 or just over three threads to engage in the cast case with a 1/2 inch screw. Better perhaps to measure what is best on your own engine and buy some to suit.......being beware of UNC imposters with only 80 degree countersink heads.</p><p>Tatty</p></blockquote><p></p>
[QUOTE="tatty500, post: 68441, member: 2532"] I bet the original screws were a non BSI preferred length. The thing with countersunk screws is that the length includes the head. The plate is 5/16 so there is only 3/16 or just over three threads to engage in the cast case with a 1/2 inch screw. Better perhaps to measure what is best on your own engine and buy some to suit.......being beware of UNC imposters with only 80 degree countersink heads. Tatty [/QUOTE]
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