Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PL 323387-A ITEM 3 found under Indicator Humidity Plug by Zeks Air Drier Corp. The National Stock Number assigned to this part is 6685014107574, 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 PL 323387-A ITEM 3.