UC Components manufactures vented screws for all High Vacuum, Ultra High Vacuum, and other clean-critical applications. Slot (side) vented or center vented screws are availableboth designs provide faster, more efficient pump-down of vacuum equipment by supplying a path through which trapped volumes of air can be evacuated. We also provide non-vented screws for use in HV and UHV system through-holes and other applications.Our vented and non-vented screws are available in a wide range of standard Inch-measurement sizes and lengths. 12 standard head styles are available, making it easy to find the right one for your particular installation requirements. See individual product listings for additional size and head style information.