JIS B1187 Phillip Hex Split Washer Flat Washer Sems Machine Screw Zinc Yell
This double washer sems screw is typically a more economical alternative to a patented conical washer sems screw. The phillips hex variety is preferred in the electronics industry where initial installation is performed with a nut driver, but the finished product has minimal clearance requiring a phillips driver to loosen the screw
