Thread | Threads per Inch | Tap Drills | Clearance Holes | Socket Head | Flat Head | ||||||
Outside Diameter | Decimal Equivalent | Drill Size | Decimal Equivalent | Close Fit | Free Fit | Counter bore Diameter |
Counter bore Depth |
Counter sink Diameter |
|||
Drill Size | Decimal Equivalent | Drill Size | Decimal Equivalent | ||||||||
0 | 0.060 | 80 | 3/64 | 0.0469 | 52 | 0.0635 | 50 | 0.0700 | 1/8 | 0.060 | 0.138 |
1 | 0.073 | 64 | 53 | 0.0595 | 48 | 0.0760 | 46 | 0.0810 | 5/32 | 0.073 | 0.168 |
72 | 53 | 0.0595 | |||||||||
2 | 0.086 | 56 | 50 | 0.0700 | 43 | 0.0890 | 41 | 0.0960 | 3/16 | 0.086 | 0.197 |
64 | 50 | 0.0700 | |||||||||
3 | 0.099 | 48 | 47 | 0.0785 | 37 | 0.1040 | 35 | 0.1100 | 7/32 | 0.099 | 0.226 |
56 | 45 | 0.0820 | |||||||||
4 | 0.112 | 36 | 44 | 0.0860 | 32 | 0.1160 | 30 | 0.1285 | 7/32 | 0.112 | 0.255 |
40 | 43 | 0.0890 | |||||||||
48 | 42 | 0.0935 | |||||||||
5 | 0.125 | 40 | 38 | 0.1015 | 30 | 0.1285 | 29 | 0.1360 | 1/4 | 0.125 | 0.281 |
44 | 37 | 0.1040 | |||||||||
6 | 0.138 | 32 | 36 | 0.1065 | 27 | 0.1440 | 25 | 0.1495 | 9/32 | 0.138 | 0.307 |
40 | 33 | 0.1130 | |||||||||
8 | 0.164 | 32 | 29 | 0.1360 | 18 | 0.1695 | 16 | 0.1770 | 5/16 | 0.164 | 0.359 |
36 | 29 | 0.1360 | |||||||||
10 | 0.190 | 24 | 25 | 0.4950 | 9 | 0.1960 | 7 | 0.2010 | 3/8 | 0.190 | 0.411 |
32 | 21 | 0.1590 | |||||||||
12 | 0.216 | 24 | 16 | 0.1770 | 2 | 0.2210 | 1 | 0.2280 | ??? | ??? | ??? |
28 | 14 | 0.1820 | |||||||||
14 | 0.242 | 20 | 10 | 0.1935 | D | 0.2460 | F | 0.2570 | ??? | ??? | ??? |
24 | 7 | 0.2010 | |||||||||
1/4 | 0.250 | 20 | 7 | 0.2010 | F | 0.2570 | H | 0.2660 | 7/16 | 0.250 | 0.531 |
28 | 3 | 0.2130 | |||||||||
5/16 | 0.313 | 18 | F | 0.2570 | P | 0.3230 | Q | 0.3320 | 17/32 | 0.312 | 0.656 |
24 | I | 0.2720 | |||||||||
3/8 | 0.375 | 16 | 5/16 | 0.3125 | W | 0.3860 | X | 0.3970 | 5/8 | 0.375 | 0.781 |
24 | Q | 0.3320 | |||||||||
7/16 | 0.438 | 14 | U | 0.3680 | 29/64 | 0.4531 | 15/32 | 0.4687 | 23/32 | 0.438 | 0.844 |
20 | 25/64 | 0.3906 | |||||||||
1/2 | 0.500 | 13 | 27/64 | 0.4219 | 33/64 | 0.5156 | 17/32 | 0.5312 | 13/16 | 0.500 | 0.938 |
20 | 29/64 | 0.4531 | |||||||||
5/8 | 0.625 | 11 | 17/32 | 0.5312 | 41/64 | 0.6406 | 21/32 | 0.6562 | 1 | 0.625 | 1.188 |
18 | 9/16 | 0.5625 | |||||||||
3/4 | 0.750 | 10 | 41/64 | 0.6046 | 49/64 | 0.7656 | 25/32 | 0.7812 | 1-3/16 | 0.750 | 1.438 |
16 | 11/16 | 0.6875 | |||||||||
7/8 | 0.875 | 9 | 49/64 | 0.7656 | 57/64 | 0.8906 | 29/32 | 0.9062 | 1-3/8 | 0.875 | 1.688 |
14 | 13/16 | 0.8125 | |||||||||
1 | 1.000 | 8 | 7/8 | 0.8750 | 1-1/64 | 1.0156 | 1-1/32 | 1.0312 | 1-5/8 | 1.000 | 1.938 |
12 | 29/32 | 0.9060 | |||||||||