Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1623-3100 FIND NO.15 found under Gasket by Engineered Coil Company. The National Stock Number assigned to this part is 5330016646953, 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 1623-3100 FIND NO.15.