Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4CB57-42061-10 found under Switch Point Railwa by Aai Corporation. The National Stock Number assigned to this part is 2250012139123, and the Federal Supply Class is 2250 Track Material Railroad. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4CB57-42061-10.