Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 31129B found under Bottle Screw Cap by Freund Container. The National Stock Number assigned to this part is 8125013460887, 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 31129B.