The Buente 80071 is a genuine M12 lock nut, specifically designated as type B. This self-locking nut features a non-metallic insert, which provides enhanced resistance against loosening due to vibration and dynamic loads. Manufactured to DIN 985 standards, it ensures reliable and secure fastening in various agricultural, construction, and industrial machinery applications. With a wrench size of 19 mm and a height of 12 mm, this zinc-plated steel nut offers durability and corrosion resistance for long-lasting performance.