Notes: 21512 SLOTTED SET SCREW UNI5923 M10X16 45H is original CARRARO product. 21512 SLOTTED SET SCREW UNI5923 M10X16 45H5 is commonly used in transmissions/axles/engines 138630, 138633, 142281, 142281, 143281, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849