Carbon Steel Grade 4.8 with Zinc Plated Hex Nut

1.Electro-galvanizing - Enhanced Rust Prevention Performance The surface is treated with electro-galvanizing, creating a dense zinc layer that effectively blocks air and moisture. Blue White Zinc: The surface is bright silver in color, the appearance is neat, and it has good rust prevention ability (salt spray for 48 hours). Colored zinc: The surface is golden yellow, with a denser passivation film and stronger rust prevention ability (salt spray test for 72 hours).
2.Precision Thread - The major diameter fits perfectly, and the minor diameter fits tightly. This product is manufactured through high-precision cold heading process, featuring full and smooth thread profiles without any burrs.
3.No hydrogen embrittlement risk - Safe and reliable By strictly following the electroplating process, the 4.8-grade low-carbon steel material has no risk of hydrogen embrittlement and eliminates the potential hazard of delayed fracture.
4.Precise dimensions - Avoid thin walls Strictly control the side dimension (S) and thickness (m), in accordance with DIN934 standard. The dimensions on the opposite side are precise, the force-receiving surface of the wrench is sufficient, and it is not prone to slipping. Galvanizing layer inspection: Random checks with a thickness gauge to ensure uniform zinc layer thickness (3-8 μm).