JIUWU 50 Pcs M3x4mm 12.9 Grade Hex Socket Head Cap Screws

Corrosion Resistance: Carbon steel bolts are surface treated, such as zinc plating, chrome plating, etc. , which can improve their corrosion resistance, 12. 9 / din912 standard, Universality: M3*4 is a common bolt specification, widely used in a variety of mechanical equipment, automobiles, electronic equipment and other fields, with a high degree of universality, Easy To Install: The head of the hexagonal bolt is designed in hexagonal shape, which makes it easy to install and dismantle using a spanner or socket, and the operation is simple and convenient. Thread size (diameter): 3 mm thread pitch: 0. 5 mm, thread length: 4 mm (manual measurement error, please note), Good Stability: M3*4 mm hexagonal carbon steel bolts have high dimensional accuracy, which can ensure the stability and reliability of the connection and reduce equipment failure and maintenance costs.