4-40 x 3/8 Slotted Fillister Head Machine Screw Fully Threaded Black Oxide WI188 The full contour truss head

The full contour truss head provides a low profile and a finished look

and chemical processing facilities

preventing the bolt from spinning or becoming loose

The sharp point and aggressive threads provide superior penetration and holding power

Whether you're hanging heavy objects

4-40 x 3/8 Slotted Fillister Head Machine Screw Fully Threaded Black Oxide WI188 The full contour truss headThe 4 40 x 3 8 Slotted Fillister Head Machine Screw Fully Threaded Black Oxide is a small, versatile screw that is commonly used in a variety of applications. It is made of steel and has a black oxide finish, which gives it a durable and corrosion resistant surface. The screw has a slotted head, which allows it to be easily driven with a screwdriver. The fillister head is slightly rounded, which gives it a finished appearance. The screw is fully