Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TSL-1681PC8 found under Gasket by Cooper Valve Co. The National Stock Number assigned to this part is 5330013160412, 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 TSL-1681PC8.