Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number Y300 290 01 found under Washer Spring Tensi by E T A Electrotechnical. The National Stock Number assigned to this part is 5310121437065, 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 Y300 290 01.