Southco has a wide range of hardware and is one of my “goto” sources. I cannot think of a new build or major refit that I have been involved in, during the last twenty years, that I have not spec’ed out at least a few of their products.
If you have ever looked for a transom or side gate latch you probably noticed that there are few elegant choices. The Swim Door Latch by Southco is the one that I use most often. It is easy to install, has very good fit and finish and has nice, clean styling. Oh, and it is 316 stainless not 304!
The image shows one on a new 106 foot motor yacht.
Here is a link to the Southco website page for this product.
Swim Door Latch on a new 106 foot motor yacht