Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9421-LF1 found under Catch Flush by Square D Co. The National Stock Number assigned to this part is 5340015620651, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 9421-LF1.