Implement Yoke, N1000 Series, 1 1/8" Round Bore, 2 1/2" Long, 5/16" Keyway, 3/8"-16 Tapped Hole New Implement Yoke for N1000 Series. 1-1/8" Round bore 2-1/2" long. Yoke has 5/16" keyway with 3/8" 16 tapped hole.    Centerline: 2 1/2"    Single Keyway: 1/4"    Size: 1 1/8" Domestic 1000 Series