Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M24 SST 304 found under Washer Spring Tensi by Johnson Rubber Co The. The National Stock Number assigned to this part is 5310013685977, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M24 SST 304.