65 Manganese Double-Sided Serrated Butterfly Washer, Self-locking & Anti-loosening, Fits M3-M42

This double-sided serrated butterfly washer is expertly crafted from high-quality 65 manganese steel, offering exceptional durability and reliability. Designed for self-locking and anti-loosening applications, it provides a secure and stable fit for bolts and joints, ideal for critical or high-vibration environments. The washer is compatible with sizes ranging from M3 to M42, ensuring versatility for various projects. Its unique butterfly design enables easy installation and removal, making it a practical choice for both professional and DIY use. This robust and efficient washer delivers enhanced performance and peace of mind in securing fasteners. Surface treatment: Oxidation black Material Grade: Spring Steel 65Mn Manufacture country: China Instructions included: No