Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 475447 31 found under Washer Flat by Halliburton Services. The National Stock Number assigned to this part is 5310000698990, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 475447 31.