Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 70750-22405-135 found under Hinge Butt by Sikorsky Aircraft Corporation. The National Stock Number assigned to this part is 5340013384539, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 70750-22405-135.