Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 52H22937-4 found under Pump Hydraulic Ram Hand Driven by Bestek Industries Incorporated. The National Stock Number assigned to this part is 4320006713294, 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 52H22937-4.