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Old 22nd August 2014, 07:55 AM
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Tench Tench is offline
WHFTA World Champion 2016.
Join Date: Sep 2009
Location: derby
Posts: 1,415

Originally Posted by rich View Post
The S200 is smaller than that. The O ring is a 21mm x 2mm or 2.5mm depending on age.
The several hundred regs I machined at 25x1mm must all have been wrong then.

A 21 x 2.5mm o ring will have an O/d of 26mm, id + 2x thickness.
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