When using countersunk self-drilling screws for steel, it is important to follow the manufacturer's guidelines for proper installation. This includes selecting the correct screw size and length for the application, as well as ensuring that the drill point is sharp and in good condition. Taking these precautions will help ensure a successful and secure fastening job.

3. Coated Tek Screws To provide additional protection against rust and corrosion, some Tek screws come with special coatings, such as zinc or polymer finishes. These are particularly beneficial for outdoor use, where environmental factors can lead to deterioration.

Galvanised hex head bolts are a popular choice in the construction industry due to their durability and resistance to corrosion. These bolts are commonly used in outdoor projects where they may be exposed to harsh weather conditions, making them an ideal choice for fences, decks, and other outdoor structures.