Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KPIN3780 found under Kingpin Wheel Spind by La Crosse Trailer Corp. The National Stock Number assigned to this part is 2530000699953, and the Federal Supply Class is 2530 Vehicular Brake Steering Axle Wheel And Track Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like KPIN3780.