Notes: 75297.2 HEX HEAD SCREW UNI 5739 M16X100 8.8 UNI is original DOOSAN product. 75297.2 HEX HEAD SCREW UNI 5739 M16X100 8.8 UNI1 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849