These are the same screws provided by manufacturer in their pitch pad kits when installing antenna mast brackets and non-penetrating mounts.
Though most mounts come with the minimal amount of requisite hardware, it by no means accounts for all mounting options, materials and custom installation scenarios. Take a moment to consider the options and materials in use. Then select the appropriate hardware to realize your goal. The flexibility and longevity of any mount to match the mounting conditions may depend on it.
Our antenna masting accessories include: