Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WSN04 0003 21 38X45 5X1 5 SILC4 found under Gasket by Westfalia Separator Mineraloil. The National Stock Number assigned to this part is 5330123252145, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WSN04 0003 21 38X45 5X1 5 SILC4.