Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 53 03 2G found under Adapter Insulator by Aavid Thermalloy Llc. The National Stock Number assigned to this part is 5970016449852, 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 53 03 2G.