Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B4179WW1 found under Door Side by Ohio Industries Inc. The National Stock Number assigned to this part is 2240004186101, and the Federal Supply Class is 2240 Locomotive And Rail Car Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B4179WW1.