Quick view 8-32 x 1/2" One Way Round Head Machine Screw Zinc Plated (Box of 100) Box of 100 One-way screws are special screws that can only be turned in one direction. They can be installed with a standard flat-blade screwdriver. One-way screws are commonly used in commercial restroom fixtures and on vehicle registration... MSRP: Was: Now: $17.30 Add to Cart