Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PS20-70 found under Lumber Softwood Board by National Bureau Of Standards. The National Stock Number assigned to this part is 5510003633211, and the Federal Supply Class is 5510 Lumber And Related Basic Wood Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PS20-70.