Industrial 1-3/8" 6-spline female PTO to 1-3/8" 21-spline male PTO splined adapter rated for 125 HP. It converts a 6-spline female PTO output to a 21-spline male PTO input on a 1-3/8" shaft, enabling a direct splined connection between mismatched PTO drives. Designed for industrial power take-off systems that require a 6-to-21 spline transition without changing other driveline components.
