Notes: 51335858 TAPERED PLUG M24X1.5 5.8 EN ISO 898-1 is original NEW-HOLLAND product. 51335858 TAPERED PLUG M24X1.5 5.8 EN ISO 898-11 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849