Features Durable Black Zinc Coating: The decorative black coating enhances protection against corrosion while ensuring it doesn't obstruct the threads for smooth installation High-Quality Steel Construction: Crafted from robust steel, these screws provide exceptional strength and reliability for various applications, ensuring long-lasting performance Chemical-Resistant Safe Coating: Featuring a solvent-based, RoHS2 compliant coating, these screws are resistant to chemicals, making them suitable for diverse environments Thread and Head Design: The design prevents any build-up in the threads or recesses, ensuring easy handling and convenience during installation or removal Versatile Fastening Solution: Ideal for a range of projects, these fully threaded bolts provide a secure fastening option for both DIY enthusiasts and professionals alike Features: 1、Zinc Plated: These screws are standard zinc plated screws with a decorative black coating applied, increasing the tightness of the product. 2、Black Coat: Black coating offers a slightly increased level of protection against and is very thin so will not interfere with the threads. 3、Safe Coating : The coating is solvent based and is resistant to chemicals and is also RoHS2 compliant. 4、No Build Up: There is no build up in the threads or recess on the heads. Convenient to use. 5、Note: Please note though that due to the thin application on these screws, it is possible that the coating may scratch slightly. Specification: Item Type: Screw Material: A2-70 Stainless Steel Model: M3, M4 Operative Standard: DIN 7985 Process: Black Zinc Plated ModelPZ2 Package List: 50 x M4x6 Screw Package List 50 x M4x6 Screw