Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number L691 54 ITEM 3 found under Sleeve Clamping Pump by Ulstein Bergen A S. The National Stock Number assigned to this part is 4320012899637, and the Federal Supply Class is 4320 Power And Hand Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like L691 54 ITEM 3.