【s】500PCS M3 M4 M5 Bolts and Nuts Sets made of high quality 304 stainless steel. High quality 304 stainless steel provides high strength and good corrosion resistance in various environments, ensuring long-term use. 【Specification】 M3*8/12/16/20 – 30 pieces each, M4*8/12/16/20 – 20 pieces each, M5*8/12 – 20 pcs each, M5*16/20 – 10 pcs each, M3 nuts – 120 pcs, M4 nuts – 80 pcs, M5 nuts – 50 pcs. The nuts and bolts are complete and offer a perfect combination. We also include 3 Allen keys. 【Simple Storage Box】All screws and nuts are stored in a storage box and neatly sorted, allowing you to easily find the part you need. Helps prevent loss of small components. 【Usage】Ideal for fixing aluminum profiles, electrical appliances, machinery, equipment, furniture, and other applications. Large contact area ensures secure connections. Allen key allows for easy tightening. 【Hexagon Socket Head】Socket head cap screws provide a larger pressure area and increased connection contact surface, enabling firm tightening under high stress. PROPERTIES - Material: High quality 304 stainless steel - Exterior: Smooth and flat finish with rounded edges, safe to handle - Nature: Excellent corrosion resistance, heat resistance, cold resistance, and high toughness - Usage: Commonly used in electronics, electrical appliances, machinery, systems, and furniture Name: 500pcs M3 M4 M5 304 Stainless Steel Hexagon Socket Head Cap Screw with Nut Set Material: 304 Stainless Steel Quantity: 500 pcs Application: Designed for fixing and connecting aluminum profiles, such as multi-slot square aluminum frames. The hexagon socket head cap screw offers a larger compression surface compared to standard screws, providing a wide contact area for strong, stable connections. Easy to tighten with a socket wrench, ensuring secure assembly of aluminum profile frames. Type: Pan Head Socket (Metric) Thread: M3X0.5, M4X0.7, M5X0.8 Packing Size: Approx 176x102x23 mm Product Net Weight: 530 grams Color: Silver Quantity Delivered: 1 Pack of 500 Pieces Warm Tips: 1. This product contains small parts. Keep away from children to avoid accidental swallowing.