Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number US72252-4-5 found under Guard Stern Tube Se by Wartsila Lips Inc. The National Stock Number assigned to this part is 2040014639576, and the Federal Supply Class is 2040 Marine Hardware And Hull Items. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like US72252-4-5.