Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3H1 121 ITEM 72 found under Insert Screw Thread by Man Diesel And Turbo Ltd. The National Stock Number assigned to this part is 5325014485035, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3H1 121 ITEM 72.