Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NN 4027 1 19) 2 1 2 IN found under Gasket by Pima Valveinc. The National Stock Number assigned to this part is 5330013777516, 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 NN 4027 1 19) 2 1 2 IN.