Date: January 18, 2026 Posted by: admin In: 1-38

1-3/8″ 6 Female Spline PTO to 1-3/8″ 21 Male Spline PTO Splined Adapter 125HP. 1 3/8-6 Female Spline P. O to 1 3/8-21 Male Spline P. O Splined Adaptor 125HP. Female End: 1 3/8 – 6. Male Spline: 1 3/8 – 21. Shaft End : 4 13/16. Shaft Retaining Groove: 5 5/16. 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.