PART NO. STECKO SIZE DIMENSIONS LEFT RIGHT A B M1 N1 M2 N2 S1 3Y9-04 1/4" 1/4" 38 38 15.16 10.03 15.16 10.03 16 3Y9-06 3/8" 3/8" 42 42.5 20.17 14.02 20.17 14.02 22 3Y9-08-06 1/2" 3/8" 45 45 24.16 18.03 20.17 14.02 27 3Y9-08 1/2" 1/2" 45 46 24.16 18.03 24.16 18.03 27 3Y9-12 3/4" 3/4" 51 51.5 29.16 24.03 29.16 24.03 36 3Y9-16 1" 1" 64 63.5 39.12 31.01 39.12 31.01 48 3Y9-20 1.1/4" 1.1/4" 64 63.5 46.15 38.02 46.15 38.02 48