Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PL 4060A2001-1 REV B ITEM NO. 4 found under Filter Radio Freque by L 3 Communications Westwood. The National Stock Number assigned to this part is 5915015384347, 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 PL 4060A2001-1 REV B ITEM NO. 4.