High-Strength & Corrosion-Resistant Hex Bolts for Marine Applications & ISO 3506 Certified

High-Strength & Corrosion-Resistant Hex Bolts for Marine Applications & ISO 3506 Certified. Made of solid 304/316 stainless steel, acid & water corrosion resistant, long service life for outdoor, chemical and marine equipment. High grade carbon steel with zinc plating, high tensile strength & cost-effective anti-rust performance for heavy engineering. Standard hex head design, uniform force distribution, anti-slip during tightening, compatible with spanner & socket wrench. Strength grade marking on head for easy identification of material & tensile strength during inspection. Flat bearing surface provides large contact area, stable clamping force & anti-loosening under mechanical vibration. Grade 8.8 high strength carbon steel, excellent load & shear resistance. Blue zinc plating, anti-rust & anti-corrosion for humid environments. Precision full rolled threads, smooth mating with standard nuts.