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LOT OF 10 PIECES: This pack includes 10 flat washers M20 x 40mm made of high-quality stainless steel, compliant with NFE 25514 M standard. EXCEPTIONAL STRENGTH: Made of A4 stainless steel (V4A / AISI 316), these washers are sturdy, corrosion resistant and suitable for use in wet or outdoor environments. Precise dimensions: inner diameter 20 mm, outer diameter 40 mm, thickness 3 mm. Ideal for screws or threaded rods with a diameter of M20. Available in other sizes M1.6 to M52. RUST RESISTANT: Unlike zinc plated or galvanized metal washers, these stainless washers will not rust, ensuring optimal durability even in harsh conditions. QUALITY GUARANTEED: ProRaje products meet industry standards, offering a wide range of A2, A4 stainless steel screws, bolts, nuts and washers.