SPECIFICATIONS: Electrical: Mechanical: 5162 .73 ±.03 [18.5 ±0.8] 5172 5/16 [7.9] HEX 5161 .80 ±.04 [20.3 ±1.0] 5171 5/16 [7.9] HEX 5160 .79 ±.03 [20.1 ±0.8] 5170 5/16 [7.9] HEX