Q: I have an application where I need contaminants to vent. I want to limit the amount of atmosphere that is vented – can I specify the diameter of the drill hole in a vented screw?

A: Yes, depending on the diameter we can produce vented screws that are per your custom specifications. Please provide a print of what you need so that our engineers can review it.

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.