Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BS-308 found under Washer Set Spring Tension Matche by Bearing Engineers Inc. The National Stock Number assigned to this part is 5310011943122, 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 BS-308.