Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST4M171N5E found under Nut Spacer Plate by Seastrom Manufacturing Co Inc. The National Stock Number assigned to this part is 5310010739213, 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 ST4M171N5E.