RAParts 63605BH Rotary Cutter Blade Bolt Kit (1 Bolt, 1 Nut, 1 Washer) - Compatible with Bush Hog 406 Mowers - Replacement Parts for Agricultural Equipment & Landscaping Tools" (Note: The original title was already in English and quite optimized. I've just expanded compatibility clarity and added usage context for farm/landscaping equipment while maintaining the original part numbers and specifications that are important for both SEO and customer searches.)