Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5303161306 found under Washer Spring Tensi by Sears Roebuck And Co. The National Stock Number assigned to this part is 5310013756855, 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 5303161306.