B1/4-28 x 1 3/4 MS90727, Alloy Steel B1821 Fine Cap Screw Per ASTM A354BD Zinc Yellow DFAR 4-22 and a pan head for

and a pan head for a flush finish

They are made of steel and are zinc plated for corrosion resistance

which means that it can create its own threads in the metal as it is driven in

while the 6-lobe truss head offers a low profile and prevents cam-out during installation

12-24 x 1 1/4 Phillips Pan Thread Cutting Screw Type F Fully Threaded Zinc:

B1/4-28 x 1 3/4 MS90727, Alloy Steel B1821 Fine Cap Screw Per ASTM A354BD Zinc Yellow DFAR 4-22 and a pan head forB1 4 28 x 1 3 4 MS90727 is an Alloy Steel B1821 Fine Cap Screw that conforms to the specifications of ASTM A354BD. It has a diameter of 1 4 inch and a length of 1 3 4 inches. The screw is zinc plated yellow and meets the requirements of the Defense Federal Acquisition Regulation Supplement (DFARS). It is typically used in applications where high strength and corrosion resistance are required.