Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 71 1139 51 found under Mentholated Expecto by Pharmacia And Upjohn Inc. The National Stock Number assigned to this part is 6505002807939, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 71 1139 51.