4 x 20mm Gi Machine - Per Pkt

They are made from galvanized iron with a zinc finish, which provides improved corrosion resistance and durability for use in a variety of environments.

The product line includes various head styles such as slotted, Phillips, and hex heads. The item described here features a Phillips slotted head for strong drive engagement.

Measure the thickness of the parts to join and the depth of the threaded hole or nut. Choose a screw long enough to engage securely, typically 1–2 full threads beyond the material, and select a diameter that matches the tapped hole or nut size you are using.

Yes. They are designed to work with nuts or tapped holes to create a strong, reliable connection for metal or plastic components.

Align the screw with the hole, start by hand to avoid cross-threading, then use the appropriate driver to tighten gradually. Avoid sudden over-tightening and use a torque-appropriate driver to prevent stripping.

The galvanized zinc finish provides good corrosion resistance for many applications, but for extreme outdoor exposure or highly corrosive environments you may want to consider additional protective finishes or stainless steel options.

They are widely used for mounting machinery components, securing electrical assemblies, joining metal or plastic parts in industrial and automotive contexts, and other general fastening tasks where threaded connections are needed.

GI machine screws with galvanization typically offer superior corrosion resistance compared to standard zinc plated options, which can be advantageous in damp or outdoor environments. If you need extra protection against rust, GI is often the better choice.

For returns, please refer to Fepy’s return policy on the site. Make sure the items are in original condition and packaging as required by the policy.

The per pkt packaging is designed for convenient bundling of frequently used sizes, offering cost efficiency for projects that require multiple fasteners. Compare the price per screw and the available size range to determine value for your specific application.