. | Standard Clearance Holes Sizes | |||||
. | Screw (UTS) | Tight Clearance | Loose Clearance | Screw Major Dia | ||
. | 0 | 52 | 0.064 | 50 | 0.070 | 0.060 |
. | 1 | 48 | 0.076 | 46 | 0.081 | 0.073 |
. | 2 | 43 | 0.089 | 41 | 0.096 | 0.086 |
. | 3 | 37 | 0.104 | 35 | 0.110 | 0.099 |
. | 4 | 32 | 0.116 | 30 | 0.129 | 0.112 |
. | 5 | 30 | 0.129 | 29 | 0.136 | 0.125 |
. | 6 | 27 | 0.144 | 25 | 0.150 | 0.138 |
. | 8 | 18 | 0.170 | 16 | 0.177 | 0.164 |
. | 10 | 9 | 0.196 | 7 | 0.201 | 0.190 |
. | 12 | 2 | 0.221 | 1 | 0.228 | 0.216 |
. | 1/4 | F | 0.257 | H | 0.266 | 0.250 |
. | 5/16 | P | 0.323 | Q | 0.332 | 0.313 |
. | 3/8 | W | 0.386 | X | 0.397 | 0.375 |
. | 7/16 | 29/64 | 0.453 | 15/32 | 0.469 | 0.438 |
. | 1/2 | 33/64 | 0.516 | 17/32 | 0.531 | 0.500 |
. | 9/16 | 37/64 | 0.578 | 19/32 | 0.594 | 0.563 |
. | 5/8 | 41/64 | 0.641 | 21/32 | 0.656 | 0.625 |
. | 11/16 | 45/64 | 0.703 | 23/32 | 0.656 | 0.688 |
. | 3/4 | 49/64 | 0.766 | 25/32 | 0.781 | 0.750 |
. | 13/16 | 53/64 | 0.828 | 27/32 | 0.844 | 0.813 |
. | 7/8 | 57/64 | 0.891 | 29/32 | 0.906 | 0.875 |
. | 15/16 | 61/64 | 0.953 | 31/32 | 0.969 | 0.938 |
. | 1 | 1/1/64 | 1.016 | 1/1/32 | 1.031 | 1.000 |
. | All diameters in inches | |||||
. | Holes sizes are only suggestions and are the same for both UNC and UNF screws | |||||