Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 500-857-01 found under Choke Assembly by Atlas Polar Company Limited. The National Stock Number assigned to this part is 6105012968503, and the Federal Supply Class is 6105 Motors Electrical. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 500-857-01.