<h3>Key features</h3><ul> <li>Black Metric Socket Head Screw Kits:178PCS M6 hex socket screw kits with nuts &amp; washers.precision-engineered threads are clean,burr-free design,uniform thread pitch.10Pcs M6x8mm,8Pcs M6x10mm,8Pcs M6x12mm,6Pcs M6x16mm,6Pcs M6x20mm,4Pcs M6x25mm,4Pcs M6x30mm,32pcs hex nuts,50pcs flat washers,50pcs lock washers</li> <li>High-Strength Alloy Steel:M6 screws manufactured from premium 12.9 grade alloy steel, these fasteners offer superior hardness and tensile strength.The clean, oil-free black oxide finish provides effective corrosion resistance, ensuring reliable, long-term performance in demanding conditions.</li> <li>Precision Socket Drive for Maximum Torque:The internal hex socket design delivers superior torque transmission and stability,preventing tool slippage for fast, secure fastening.nuts and washers for vibration resistance,secure connections without needing additional parts.</li> <li>Versatile Applications:Ideal for a multitude of projects including 3D printing, electronics assembly,machinery,RC models, furniture repair, and light machinery maintenance,DIY projects,and repairs,serving hobbyists,professionals in both workshop and industrial environments.</li> <li>Storage for Efficiency:M6 screws kit are neatly housed in a durable,with the included hex wrench.compartmentalized case with clear internal and external labels,multiple sizes length available to meet all needs.</li> </ul><p>Free shipping included. 30-day hassle-free returns.</p>