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400PCS M4 Socket Head Cap Screw Assortment Kit, 6-30mm | 12.9 Grade Alloy Steel, Black Zinc Plated, Nuts & Washers Included, Machine Screw Hardware, 3D Printing, DIY Repairs

-50% $ 4 .99 $9.99
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Description
400 PCS M4 Metric Screw Kit — This M4 screw assortment kit is designed for 3D printing, electronics, RC models, CNC machinery, chair repairs, and DIY projects, providing reliable fastening performance for detailed and intricate assemblies.
Standardized M4 Metric Specifications — Includes 8 commonly used lengths: M4 x 6mm / 8mm/ 12mm / 16mm / 20mm / 25mm / 30mm. Plus 1pcs mini wrench.Manufactured to strict metric standards with average dimensional tolerance under 0.01mm, ensuring precise fit and smooth installation.
Premium 12.9 Grade Alloy Steel — These M4 Allen head screws deliver exceptional hardness, strength, and load-bearing performance. Designed to resist wear, deformation, and corrosion, making them reliable for high-stress and demanding environments.
Clean & Rust-Proof Finish — Black zinc plated for oil-free handling, keeping hands and workpieces clean. Provides enhanced rust resistance for long service life, suitable for indoor and outdoor projects alike.
Labeled Compartment Storage Case — All bolts, nuts, and washers are neatly organized in a durable, clearly labeled case, allowing quick size identification, reduced loss, and a cleaner workspace—saving time and improving efficiency on every project.

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