Greetings, Quick version: I'm starting up a project which calls for a 3/8" hole to be reinforced with a brass grommet. Note: the desired ID would be 3/8" (trying to preserve a specific allowance). The other important bit is that I am using thin tooling leather, 4/5oz. Grommet requirements would be high-quality and all brass, USA made preferred. Any recommendations? Details: After some research on grommets, Stimpson caught my eye on thomas registry. Made in USA goods, founded 1852, all types of product, etc. Ordered a grommet catalog and had my eye on a self-piercing model but had a question about their L.U.F (length under flange) measurement. I called their sales reps, who told me that the L.U.F + 1/16" would be the recommended thickness for that grommet. For their 3/8" grommet this would be ~0.2625". Using Herman Oaks thickness guide, 4/5oz (.0625-.078125") leather would not work. I tried to communicate this to the reps and creatively figure out a solution but they weren't much help. Their basic response was that as the ID hole got bigger so does the L.U.F. They did offer to try and set the grommet for me if I sent in a scrap, but I figured there has to be a product to fit my requirements. I've found this post about adding eyelets to suede, which transitioned to recommending grommets, and a couple tips on looking at sailing grommets for canvas, tarp, or the like. Also this post, which said Harbor Freight is a good place to go. I will follow up on all of those tips, but wanted to hear if anyone specifically has used grommets with my thickness of leather (~4/5oz)? I like working with USA based companies like Stimpson as I will be buying in bulk and like supporting domestic made goods. Cheers!