B1/4-20 x 4 1/2 MS90728, Alloy Steel B1821 Coarse Cap Screw Per ASTM A354BD Zinc Yellow DFAR 10-16 and the modified truss head

and the modified truss head has a low profile that sits flush with the surface

They are made of steel and have a black zinc finish for corrosion resistance

such as attaching wood

These screws are ideal for use in outdoor projects

B1/4-20 x 4 1/2 MS90728, Alloy Steel B1821 Coarse Cap Screw Per ASTM A354BD Zinc Yellow DFAR 10-16 and the modified truss headB1 4 20 x 4 1 2 MS90728 is an alloy steel cap screw that conforms to ASTM A354BD standards. It has a diameter of 1 4 inch, a length of 4 1 2 inches, and a coarse thread pitch. The screw is made of alloy steel, which is a high strength material that is resistant to wear and corrosion. It has a zinc yellow dichromate finish, which provides additional corrosion resistance. The screw is designed for use in a variety of applications, including automotive,