Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B50 40-14 found under Retifier Valve Con by South Bay Redox Medical Supplies. The National Stock Number assigned to this part is 6130013209152, and the Federal Supply Class is 6130 Converters Electrical Non Rotating. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B50 40-14.