Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WJ620-48 found under Filter Assembly Electrical by Watkins Johnson Co. The National Stock Number assigned to this part is 5915010404506, and the Federal Supply Class is 5915 Filters And Networks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WJ620-48.