This industrial PTO spline adapter converts a 1-3/8" (21-spline) female PTO to a 1-3/4" (20-spline) male PTO, rated for 125 HP. It provides a direct interface between PTO components with these specific spline counts, enabling compatibility between equipment and attachments that use 21-spline female and 20-spline male configurations. Use with matching 1-3/8" 21-spline female and 1-3/4" 20-spline male PTO shafts to transmit up to 125 horsepower.
