Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3H1 120 ITEM 14 found under O Ring by Man Diesel And Turbo Ltd. The National Stock Number assigned to this part is 5331013952809, 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 3H1 120 ITEM 14.