McMaster Carr has almost any size and type O-ring you could want. They also make to order for the really strange sizes.
McMaster is high but they have things you can't get anywhere else for me I live 20 minutes from their warehouse I have an account so I order it for will call and pick it up saves shipping cost.McMaster Carr has almost any size and type O-ring you could want. They also make to order for the really strange sizes.
I have tried to use Grainer's website many many times over the decades, it has not improved one iota since it first went up in the early '90s.Maybe if you're far away. I'm lucky that I'm 13 miles from them and if I order before noon, I can have stuff the same afternoon and the small or medium parts box is under $10 shipping. Makes it not even worth driving there, but if it will fit in the Wing I often use it as an excuse to get out of the shop and on my bike. 🤡 Order later and it will show up the next morning.
I just did a test and sending something breadbox sized (a welding helmet) to Hope AR was less than $15. Sounds pretty reasonable to me.
Granted for production, their prices are a bit high, but for prototypes, or onesie twosies the ability to get everything from one place makes using them a no brainer. And without a doubt they have the best website of any major supplier. Puts Grainger to shame. They even have CAD models of a ton of items that you can drop into a lot of CAD packages with a click or two.