50pcs DIN 7985 Steel Pan Head Machine Screw Fully Threaded Black Zinc Plated Bolts FastenerM4x30

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 corrosion 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.