What is the difference between a machine screw and a wood screw?
A machine screw has a uniform metric thread and needs a nut or a tapped hole to hold it. A wood screw has a coarse, tapering thread that cuts its own grip into timber. These are machine screws, so they pair with the supplied nut and won't bite into wood on their own.
Do these come with nuts?
Yes. Each screw is supplied with a matching hex full nut, so you can bolt through a hole straight away.
What thread do they have?
A standard metric machine thread. That means you can also run them into a matching tapped hole if you prefer not to use the nut.
What is the difference between a countersunk and a pan machine screw?
A countersunk head is cone-shaped and sits flush in a chamfered hole. A pan head is rounded and sits proud on the surface. Pick countersunk when you want a level finish with nothing standing above the workpiece.
Are they suitable for outdoor use?
The zinc plating handles dry, indoor conditions well. For exposed or damp locations, a stainless or higher-spec coated fixing is a better long-term choice.