Disclaimer: I am not selling these, not bidding on these, and I don't have any affiliation with the seller.
I have these swagelok bulkhead fittings all over my brewstand. SS-810-11-8. They normally sell for about $25 new, best I've seen is $15. There are some on eBay for crazy low prices. Now is a good time to need these!
Here are some photos of where I use them: