B3/4-16 x 2 1/4 MS90727, Alloy Steel B1821 Fine Cap Screw Per ASTM A354BD Zinc Yellow DFAR 8-16 These 8-18 x 1/2" square

These 8-18 x 1/2" square drive flat head fully threaded self-drilling screws are made of 18-8 stainless steel

while the indented hex washer head ensures a tight grip and prevents slippage during installation

They have a #2 Phillips drive and an undercut head that helps to prevent stripping

The 3/8-12 x 1 Slotted Indented Hex Washer Self Drilling Screw Full Thread Zinc & Bake is a versatile and durable fastener designed for a wide range of applications

They have a Phillips drive head and a round head

B3/4-16 x 2 1/4 MS90727, Alloy Steel B1821 Fine Cap Screw Per ASTM A354BD Zinc Yellow DFAR 8-16 These 8-18 x 1/2" squareB3 4 16 x 2 1 4 MS90727 is an alloy steel fine cap screw that meets the specifications of ASTM A354BD. It has a diameter of 3 4 inch, a length of 2 1 4 inches, and a tensile strength of 120,000 psi. The screw is zinc plated for corrosion resistance and is DFAR compliant. It is commonly used in applications where high strength and corrosion resistance are required.