PTO Adaptor - Female Spline 1 3/4'' - 20 X Male Spline 1 3/8'' - 6 with Clamp Bolt. - Sparex Part S.151772PTO Adaptor Female spline 1 3 4'' 20 x Male spline 1 3 8'' 6 with Clamp Bolt. S. 151772 This heavy duty PTO Adaptor is designed for applications exceeding 70HP. It features a female spline of 1 3 4" with 20 splines and a male spline of 1 3 8" with 6 splines. The adaptor utilizes a clamp bolt connection type and increases the length by 5" (127mm) for a total length of 7 7 8" (200mm). Product Specifications Brand: Sparex Connection Type: Clamp Bolt