Hole Sizes and Tolerances


  
		     STANDARD HOLE SIZES

SCR |BODY |  FLOATING COND.(HOLE CLR)  |   FIXED COND.(HOLE CLR)   |
SIZE|SIZES|   RECTANGULAR HOLE TOL+/-  |  RECTANGULAR HOLE TOL+/-  |   
 NO.|     |.005  .010  .015  .020 .030 |.005  .010  .015 .020 .030 |
----|-----|----------------------------|---------------------------|
    |     |                            |                           |   
 2  |.086 |.101 *.116 *.140            |.114 *.142                 |   
 4  |.112 |.128  .140 *.156 *.169 *.196|.140 *.169                 |  
 6  |.138 |.152  .166  .180 *.196 *.209|.166 *.196 *.221           |  
 8  |.164 |.180  .193  .209  .221 *.238|.193  .221                 |  
10  |.190 |.204  .218  .234  .250 *.277|.218  .246 *.277           |  
12  |.216 |.234  .246  .261  .272  .302|.246  .272  .302           | 
1/4 |.250 |.265  .281  .295  .312  .339|.281  .312  .339           | 
5/16|.312 |.328  .343  .358  .375  .397|.343  .375  .397           | 
3/8 |.375 |.390  .404  .422  .437  .468|.404  .437  .468           | 
7/16|.438 |.453  .468  .484  .500  .531|.468  .500  .531           | 
1/2 |.500 |.515  .531  .547  .562  .593|.531  .562  .593  .625 .672| 
9/16|.562 |.578  .593  .609  .625  .656|.593  .625  .656  .687 .734| 
5/8 |.625 |.640  .656  .672  .687  .718|.656  .687  .718  .750 .796| 
3/4 |.750 |.765  .781  .797  .812  .843|.781  .812  .843  .875 .922|
 
   * ONE FLT W MUST BE SPECIFIED UNDER RD & PNH SCRS & LCK W