Q: I heard their is a type of bolt with a hollow core that I can use to enable a faster pump-down on my vacuum system. Is this something you are familiar with or can offer?
A: Yes this type of bolt is referred to as a vented screw. It has a bore that is drilled from the head down through the shank of the screw which allows gases to escape in high pressure and vacuum environments. We can offer vented screws in a variety of sizes and bolt head styles.