Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CB156-35 found under Seal Rotary Wing He by John Crane Inc. The National Stock Number assigned to this part is 1615008815493, and the Federal Supply Class is 1615 Helicopter Rotor Blades Drive Mechanisms And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CB156-35.