Kelch 3.5 Major Diameter Cap Neck

Kelch 3.5" Major Diameter - Modified Buttress, will fit the cap in the link below and others with similar pitch/thread count. This particular component is also designed around the rotational molding process.

I have a complete 2D drawing that this was designed around and only have provided a major dimension reference drawing.

https://www.kelch.com/products/caps-gauges-and-sensors/click-to-seal-ratchet-350-cap/

Designed in Solidworks