Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B-WK-891-12 found under Wedge Dog Door Hatc by Walz And Krenzer Inc. The National Stock Number assigned to this part is 5342016432165, 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 B-WK-891-12.