4-40 x 1/2 Phillips Fillister Machine Screw Fully Threaded 18-8 Stainless Steel NCAG They have a zinc coating

They have a zinc coating for corrosion resistance

10-24 Cold Forged Wing Nut Black Oxide and Oil

and it is reusable

The 3/8-16 x 2 Carriage Bolt Grade 8 Fully Threaded Yellow Zinc is a high-strength fastener designed for heavy-duty applications

The bugle head provides a flush

4-40 x 1/2 Phillips Fillister Machine Screw Fully Threaded 18-8 Stainless Steel NCAG They have a zinc coatingThese 4 40 x 1 2" Phillips Fillister Machine Screws are made of durable 18 8 stainless steel, providing excellent corrosion resistance. Their fully threaded design allows for a strong and secure hold in various applications. The Phillips drive style ensures easy installation and removal using a standard Phillips screwdriver. These screws are ideal for use in marine, automotive, and other demanding environments where corrosion resistance is crucial.