Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R66172D43818-2 found under Transformer Power by Unifab Industries Inc. The National Stock Number assigned to this part is 5950001114720, and the Federal Supply Class is 5950 Coils And Transformers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R66172D43818-2.