5/16-18 x 3/8 Slotted Fillister Head Machine Screw Fully Threaded Zinc 9/16-12 NE They have a slotted drive

They have a slotted drive and a fillister head

Its small size (10-24 thread diameter

providing a flush finish

while the 100º flat head sits flush with the surface for a clean and professional finish

The head has a domed top and the neck has four flats

5/16-18 x 3/8 Slotted Fillister Head Machine Screw Fully Threaded Zinc 9/16-12 NE They have a slotted driveThe 5 16 18 x 3 8 Slotted Fillister Head Machine Screw Fully Threaded Zinc is a type of screw that is used to fasten two pieces of material together. It has a slotted head that allows it to be tightened with a screwdriver, and a fully threaded shank that provides a strong hold. The zinc coating helps to protect the screw from corrosion, making it ideal for use in outdoor applications.