Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 57-757-301 found under Resistor Fixed Film by Astec America Inc. The National Stock Number assigned to this part is 5905001383376, 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 57-757-301.