Thread: B s p
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Old 15-09-13, 21:01
motto motto is offline
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Location: Woodend,Victoria,Australia
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Default Metric vs BSP
For some strange reason spark plugs have been standardised in metric, 10, 14, 18 and 22 mm that I'm aware of.
22 mm is close to 7/8" dia.
I believe that in earlier days some were BSP.

David
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