Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SL50-0127 found under Insulator Feedthru by Carborundum Co The. The National Stock Number assigned to this part is 5970002961448, and the Federal Supply Class is 5970 Electrical Insulators And Insulating Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SL50-0127.