PART NO. STECKO SIZE DIMENSIONS LEFT RIGHT A B M1 N1 M2 N2 S1 3Y4-04 1/4" 1/4" 32.8 32.8 15.16 10.03 15.16 10.03 16 3Y4-06 3/8" 3/8" 35.3 35.3 20.17 14.02 20.17 14.02 22 3Y4-08 1/2" 1/2" 37 37 24.16 18.03 24.16 18.03 27 3Y4-12 3/4" 3/4" 40 40 29.16 24.03 29.16 24.03 36 3Y4-16 1" 1" 49.5 49.5 39.12 31.01 39.12 31.01 48 3Y4-20 1.1/4" 1.1/4" 49.5 49.5 46.15 38.02 46.15 38.02 48