Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 023 161 00238477316 NO 13B found under Washer Lock by Sun Star Electric Inc. The National Stock Number assigned to this part is 5310015002757, 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 023 161 00238477316 NO 13B.