Figure 1. Knock-Out Dimension Diagram 5 (Models: 2138, 4089, and 4103) Model Dimensions mm (in) D D1 D2 W W1 φd4 φd5 2138 4089, 4103 112.4 (4.43) 112.8 (4.44) 55.8 (2.20) 73.5 (2.89) 35 (1.38) 35 (1.38) 62 (2.44)