R&G dowels (also called grooved dowels) consist of a brass bushing and steel pin. They are placed along the mould´s flange and do ensure a proper fit of the mould halves.
OD of the brass bushing is 8 mm and of the lower, cylindrical part of the steel peg 7.95 mm. Length of the bushing is 8.20 mm, the total length (bushing + peg) 20.65 mm. ID of the brass bushing is 5.97 mm, OD of the steel peg 5.95 mm.
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