Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4X4X8SB found under Lumber Non Wood Dimensional by Cook David. The National Stock Number assigned to this part is 5675014481605, and the Federal Supply Class is 5675 Non-Wood Construction Lumber And Related Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4X4X8SB.