Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number G140-1-78X25-12 found under O Ring by Esw Gmbh. The National Stock Number assigned to this part is 5331009839881, 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 G140-1-78X25-12.