Date: November 18, 2025 Posted by: admin In: 1-38

1-3/8″ 21 Spline Female PTO to 1-3/4″ 20 Spline Male PTO Spline Adapter 125HP. 1 3/8-21 Female P. O to 1 3/4-20 Male P. O Spline Extender 125HP. Female End: 1 3/8 – 21. Male Spline: 1 3/4 – 20. Shaft End : 4 63/64. Shaft Retaining Groove: 4 31/64. Secured By: Clamp Type. If there’s something you’re not sure about or have a question about anything, just send us a message by clicking “Ask a question” below the listing.