Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2 CTDR found under Cover Junction Box by Mason L E Co. The National Stock Number assigned to this part is 5975013546251, and the Federal Supply Class is 5975 Electrical Hardware And Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2 CTDR.