Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12161 found under Jar Spring Fastener Cap by Justrite Mfg Co. The National Stock Number assigned to this part is 8125016002396, and the Federal Supply Class is 8125 Bottles And Jars. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12161.