Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3621 found under Vent Adpater Electr by Teledyne Technologies Incorporated. The National Stock Number assigned to this part is 5970012129556, 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 3621.