(1kg) Black Zinc Flat Head Iron Self -Attack Screw M4X40mm.

✅Material: Black zinc flat head iron self -attack screw is made of carbon steel galvanized material, corrosion resistant and high temperature resistant； ✅Installation: Dispenser bolts are easy to install, and can be tightened with bolts where they need to be level, anti-slip; ✅ Performance:the screws have good compressive strength and do not deform in other force mechanical properties; Be applicable：Used in airplane model, Construction machinery, ship model, car models and DIY craft makingindustry, handicrafts, pipelines, mechanical structural； If you have any questions about the product, please feel free to contact us, and we will do our best to help you.