Premium compact fastener for precise assemblies. This used M4x20 hex socket half-round head screw is engineered for reliability in compact mechanical projects. Constructed from carbon steel and galvanized for corrosion resistance, it stands up to damp or storage environments while maintaining a clean, professional finish.

• Size and drive: M4 x 20 mm with a hex socket drive for secure, flush installation using a standard Allen key.
• Head style: Half-round head provides a low-profile silhouette with strong bearing surface to distribute load.
• Material and finish: Carbon steel core with galvanization to resist rust and wear in everyday use.
• Condition: Pre-owned but inspected for function; ready for immediate use in compatible projects.
• Includes: After-sale accessories package to support installation or future adjustments.
• Ideal for: Small mechanical assemblies, electronics enclosures, hobbyist builds, DIY furniture, prototyping, and miniature machinery where space is tight.

Why choose a galvanized carbon steel screw? The coating adds a robust rust barrier, enabling you to pair aesthetics with durability in both indoor and sheltered outdoor applications. The hex socket drive reduces the risk of cam-out, keeping your fastenings tight and consistent even in cramped spaces.

Practical usage tips:

• Pair with matching nuts and flat washers when used with through-holes to prevent pull-through and to distribute load.
• Ensure the receiving thread is clean and lightly lubricated to ease installation and extend thread life.
• Store in a dry place; even galvanized screws benefit from a moisture-controlled environment to maximize life expectancy.

With its compact dimensions, robust galvanized finish, and a practical after-sale accessories package, this used M4x20 hex socket half-round head screw is a versatile addition to any kit. Whether you’re updating a small project or stocking your workshop for quick-turn builds, this screw delivers dependable performance without the price tag of new components.