Our 10.9 grade high strength flange bolts adopt integrated flange design, available in half thread and full thread styles with standard M20 specification. Made of high-strength alloy steel, the bolts feature excellent tensile resistance, toughness and structural stability, meeting heavy-load fastening demands. Integral flange surface replaces traditional gasket design, with good anti-slip and anti-loosening effect, uniform stress bearing and tight fitting. Precision threaded processing ensures smooth assembly and firm connection. The overall workmanship is fine, wear-resistant and not easy to deform under long-term working conditions. Widely used in auto parts, engineering machinery, mechanical equipment and industrial assembly fastening scenarios. Complete specifications in stock, factory direct supply supports bulk wholesale, and non-standard custom processing of special sizes and lengths is available.