Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1SF1021 found under Resistor Fixed Wire Wound Induct by Striegel Supply Inc. The National Stock Number assigned to this part is 5905001005026, 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 1SF1021.