Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 25ARM300 5C found under Insulator Feedthru by Dayton Granger Inc. The National Stock Number assigned to this part is 5970014473754, 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 25ARM300 5C.