Fits Series 12N: U-Joint Cap Size: 1-1/16” / 1.063” Cap to Cap: 2-1/2” / 2.500”. Our eBay Store About Us Contact Us Add to Favorite Sellers Weasler 1-1/4″ Round Bore 1/4″ Keyway & Set Screw Implement Yoke 12N Series 51.95 Fits Series 12N: U-Joint Cap Size: 1-1/16” / 1.063” Cap to Cap: 2-1/2” / 2.500”.