Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40-1930-B INC PC20 found under Packing Preformed by Snap Tite Inc. The National Stock Number assigned to this part is 5330007276998, 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 40-1930-B INC PC20.