Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number OM-STD-40 found under Cell Electrocatalytic by Exceltec Intl Corp. The National Stock Number assigned to this part is 4630013849249, and the Federal Supply Class is 4630 Sewage Treatment Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like OM-STD-40.