| Stud Size Terminals | ||||
|---|---|---|---|---|
| Terminal Hole Diagram | U.S. Custom Stud Size | Metric Stud Size | Stud Diameter | Minimum Terminal Hole Diameter |
 | #0 | – | 0.060 inch | 0.064 inch |
 | #1 | – | 0.073 inch | 0.077 inch |
 | #2 | M2 | 0.086 inch | 0.090 inch |
 | #3 | – | 0.099 inch | 0.103 inch |
 | #4 | – | 0.112 inch | 0.116 inch |
 | #5 | M3 | 0.125 inch | 0.129 inch |
 | #6 | M3.5 | 0.138 inch | 0.142 inch |
 | #8 | M4 | 0.164 inch | 0.168 inch |
 | #10 | – | 0.190 inch | 0.194 inch |
 | #12 | – | 0.216 inch | 0.220 inch |
 | #14 | – | 0.242 inch | 0.245 inch |
 | 1/4" | M6 | 0.250 inch | 0.260 inch |
 | 5/16" | M8 | 0.312 inch | 0.323 inch |
 | 3/8" | – | 0.375 inch | 0.385 inch |
 | 7/16" | – | 0.437 inch | 0.448 inch |
 | 1/2" | M12 | 0.500 inch | 0.510 inch |