SS Flange Nut – Corrosion-Resistant & High-Strength Fastening SS Flange Nuts are stainless steel nuts with an integrated flange, which acts like a built-in washer to distribute load evenly and prevent surface damage. The flange provides enhanced stability, reduces loosening, and ensures secure fastening under vibration or heavy loads. Manufactured from premium-grade stainless steel (SS 304 / SS 316), these nuts offer excellent corrosion resistance, durability, and long-lasting performance, making them ideal for marine, outdoor, automotive, construction, and industrial applications.