Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 405-2-4175 found under Piston Hydraulic Brake by Ward Hydraulics Div. The National Stock Number assigned to this part is 2530004002243, and the Federal Supply Class is 2530 Vehicular Brake Steering Axle Wheel And Track Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 405-2-4175.