Premium AISI316 Stainless Steel Nylon Lock Nut for Secure Fastening. Premium Material Grade: Made from AISI316 Stainless Steel (Grade A2/A4) for superior corrosion resistance. Secure Locking Design: Butterfly Wing head style with hinged bolts ensures secure fastening and easy handling. Wide Size Range: Available in sizes from M5 to M20 to fit various application requirements. Multiple Standards: Complies with DIN, ANSI, GB, and GOST standards for global compatibility. Custom Packaging: Offers customized packaging solutions, including personal package requirements. Manufacturer Direct: Own factories in China ensure quality control and competitive pricing. Free Samples: Free samples provided for inspection before placing a firm order. Flexible Payment: Supports T/T, Irrevocable L/C, D/P, and other secure payment methods.