Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6423B found under Bracket Oil Filter by Curtiss Wright Electro Mechanical Corporation Div Steam And Air Solutions. The National Stock Number assigned to this part is 5342010747975, 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 6423B.