481PCS M3 Long Hex Socket Head Cap Screws and Nuts Assortment Kit, Grade 12.9 Alloy Steel Metric Bolts (M3 x 30/35/40/45/50mm) with Flat & Spring Washers and Wrench for RC,3D Printing, Drones

About this item 1. GRADE 12.9 HIGH TENSILE STRENGTH: Crafted from premium 12.9 grade alloy steel, these M3 bolts offer superior tensile strength and durability. The black oxide finish provides enhanced corrosion resistance, making them ideal for high-stress applications where reliability is non-negotiable, surpassing standard stainless steel or 8.8 grade bolts. 2. SPECIALIZED LONG M3 SIZES ASSORTMENT: Specifically curated for projects requiring extra reach. Includes M3 x 30mm, 35mm, 40mm, 45mm, and 50mm lengths. Perfect for deep-hole fastening in 3D printer frames, robotics, and industrial machinery assembly where standard short-screw kits fall short. 3. COMPLETE 4-IN-1 FASTENER SOLUTION: This 481pcs kit provides a professional-grade assembly experience. Each screw set is paired with matching hex nuts, flat washers, and spring washers. The inclusion of spring washers ensures exceptional vibration resistance, preventing loosening in high- Acheter sur Amazon