[ Materials]500PCS M3 M4 M5 Bolts and Nuts Sets Made of 304 stainless steel, 304 stainless steel provides high strength and good corrosion resistance in a variety environments, ensuring long-term use. [Specification] M3 x 8/12/16/20 30 pieces each, M4 x 8/12/16/20 20 pieces each, M5 x 8/12 20 pcs each, M5 x 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 you a perfect combination. We also equip you with 3 Allen keys. [Simple storage box]All screws, nuts have been stored in a storage box and neatly sorted so that you can easily find the part you want when you need it .And to save you from losing parts when needed. [Usage]It is mainly used for fixing aluminum profiles, electrical appliances, chemicals, water, machinery and equipment, furniture and many other fields, the contact area is large,The Allen key is easy to tighten. [Hexagon socket head] The socket head screw pressure area is relatively large, the connection contact area is large, and the high-stress contact area can easily tighten the nut. <b>PROPERTIES< /b> -Material: 304 stainless steel. -Exterior: Our products have been polished many times, smooth and flat, with rounded corners and will not cut you not hands. -Nature: which has excellent corrosion resistance, heat resistance, cold resistance and high toughness. -Usage: The main field of The application of stainless steel hex screw is very common in electronics, for electrical appliances, machinery and systems, furniture and many other fields. Name: 500pcs M3 M4 M5 304 stainless steel hexagon socket head cap screw with nut set. Material: 304 stainless steel. Quantity: 500 pcs <b>Application:</b> Mainly used for fixing connection of aluminum profiles, such as fixing connection between square aluminum profiles with multiple slots. The compression surface of the hexagon socket head cap screw is larger than that of the hexagon socket head cap screw, the connection contact surface is large, the socket wrench is easy to fix, and the frame made of aluminum profiles can be securely connected. . Type: Pan Head Socket (Metric) Thread: M3X0.5 M4X0.7 M5X0.8 Packing Size: approx 176 x 102 x 23 Product net weight: 530 grams Colour: silver Quantity delivered: Pack of 500 < b>Warm Tips:</b> 1.The products contain small parts, keep away from children to avoid accidental swallowing. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.