Notes: 21521 SLOTTED SET SCREW UNI592 is original CARRARO product. 21521 SLOTTED SET SCREW UNI5925 is commonly used in transmissions/axles/engines 141536, 141758, 142084, 142249, 145706, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849