Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BS-0721-0013 found under Resistor Fixed Film by British Sarozal Ltd. The National Stock Number assigned to this part is 5905009665642, and the Federal Supply Class is 5905 Resistors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BS-0721-0013.