10-16 x 1 1/8 Square Drive Flat Head Fully Threaded Self Drilling Screw 18-8 Stainless Steel 5/16-18-1 They have a hex head

They have a hex head that requires a hex wrench or key to tighten or loosen

while the zinc and baked finish offers corrosion resistance

The 1/4-20 x 1 3/4 Phillips Flat Machine Screw Fully Threaded Black Zinc is a versatile and durable fastener designed for a wide range of applications

and a fully threaded design for maximum holding power

It is made of zinc-plated steel and is used to distribute the load of a bolt or screw over a larger area

10-16 x 1 1/8 Square Drive Flat Head Fully Threaded Self Drilling Screw 18-8 Stainless Steel 5/16-18-1 They have a hex headThese 10 16 x 1 1 8" square drive flat head fully threaded self drilling screws are made of 18 8 stainless steel. They have a sharp point that drills its own hole, making them easy to install. The square drive head prevents the bit from slipping, and the flat head sits flush with the surface. These screws are perfect for a variety of applications, including metal, wood, and plastic.