Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S25A-120 found under Gear Spur by Designatronics Incorporated. The National Stock Number assigned to this part is 3020000160315, and the Federal Supply Class is 3020 Gear Pulley Sprocket And Transmission Chain. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S25A-120.