<h3>Key features</h3><ul> <li>Product Details This complete 795PCS M3 Screw Kit covers 8 commonly used lengths: M3x10/12/14/16/20/25/30/40mm. Precision-engineered to strict metric standards with an average tolerance of less than 0.01mm, and comes with a plentiful supply of matching hex nuts and washers. Includes a free hex key (Allen wrench) for immediate use – no need to search for the right tool.</li> <li>Premium 10.9 Grade Alloy Steel Made from high-strength 10.9 grade alloy steel, this M3 Screws Assortment Kit delivers excellent wear resistance, corrosion resistance, high load-bearing capacity, and toughness. An ideal choice for indoor and light outdoor use.</li> <li>Black Zinc Plated for Rust Protection This M3 Machine Screw Assortment Kit features a black zinc plating finish that effectively resists rust while keeping your hands and tools clean. The plating adds hardness and basic wear protection, significantly extending the lifespan of the screws. A light yellow anti-rust oil is applied at the factory — this is normal and can be wiped off with a cloth if desired.</li> <li>Compartmentalized Storage This M3 Metric Screws Kit comes in a sturdy, transparent storage case with clearly labeled slots for each size. Quickly find the right screw at a glance — saving time and keeping your workspace neat. Perfect for workshop, job site, home, and everyday DIY storage.</li> <li>Wide Application These M3 Button Head Socket Cap Screws are ideal for 3D printer frame assembly and enclosure panels, laptop and consumer electronics repair, RC model chassis and body panels, furniture replacement, and everyday DIY projects. Note: M3 is a small-diameter screw — please confirm your size requirements before ordering.</li> </ul><p>Free shipping included. 30-day hassle-free returns.</p>