Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7394-4 AND 900300 found under Stopper Waste Drain by Frost Co. The National Stock Number assigned to this part is 4510012839757, 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 7394-4 AND 900300.