Date: 12/31/1969 Views: 3741
Date: 04/16/2005 Views: 3206
Date: 07/19/2007 Views: 2949
Date: 08/23/2023 Views: 200864
External thread dimension of the tank opening area is a nominal 2.55 in or 64.77 mm. I say "nominal" as the dimension varies quite a bit around the opening.