Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P25RI SPEC 12757 found under Gear Assembly Speed by Funk Mfg Co. The National Stock Number assigned to this part is 3010014413744, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like P25RI SPEC 12757.