Yigu 304 Stainless Steel M3M4 Elastic Wave Crest Anti-Loosening Spring Washer

This product is an expertly crafted spring washer made from durable 304 stainless steel, designed specifically for M3 and M4 bolt sizes. Its innovative elastic wave crest design provides exceptional anti-loosening capabilities, ensuring secure and stable fastenings even in high-vibration environments. Ideal for both industrial and DIY applications, this washer combines strength with reliability to enhance the longevity and safety of your assemblies. Standard No.: CNS 4409-1981 Surface Treatment: None Material Grade: A2-70 Product Grade: A-level Part Number: AL031 Manufacture country: China Instructions included: No