Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D-WK-879-4-5 RH found under Dog Door Closer by Walz And Krenzer Inc. The National Stock Number assigned to this part is 5342016473814, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D-WK-879-4-5 RH.