Date: 12/31/1969 Views: 5950
Date: 07/23/2004 Views: 3692
Date: 12/31/1969 Views: 4331
Date: 08/23/2023 Views: 819123
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.