Wayne
Still cant PM you (not sure if its just that your new or it could be your settings - ask admin) Brewman is going on holidays for the next week or so, I'll be filling in to keep the orders moving, if you send an email to Brewman (
[email protected]) I'll have a look at what you need and see if we cant find the parts for you.
There were some hatch O-rings there last time I needed some, as well as all the other small parts.
Over time the shape of the hatch O-rings morphs into the shape you are seeing, they start out round but eventually remember the shape of the hatch. Over the years there have been lots of different O-rings made some were different having a D shaped section these are no longer available and the round ones will work.
There have also been lots of different hatches, some that have an impressed dent in the side where the locking leaver is mounted are a bit of a PITA but in general unless the hatch is bent (can happen) you should be able to get a seal.
Mark
PS
If you take out a keg post and find the washer (called a Life Saver washer) is yellow, get it out (probably in pieces) the material they are made of crumbles over time and you end up with yellow plastic crumbs jammed in all your parts or in your beer, seriously painful.
M