|
|
Tapping
& Clearance Hole Specifications
| Machine
Screw Size |
Tapped
Holes |
Clearance
Holes |
|
Aluminum,
Brass & Plastics |
Stainless
Steel, Steels & Iron |
All
Materials |
| 75%
Thread |
50%
Thread |
Close
Fit |
Free
Fit |
| No.
or Dia. |
Major
Dia. |
Thds
Per Inch |
Minor
Dia. |
Drill
Size |
Decimal
Equiv. |
Drill
Size |
Decimal
Equiv. |
Drill
Size |
Decimal
Equiv. |
Drill
Size |
Decimal
Equiv. |
| 0 |
.0600 |
80
F |
.0447 |
3/64 |
.0469 |
55 |
.0520 |
52 |
.0635 |
50 |
.0700 |
| 1 |
.0730 |
64
C |
.0538 |
53 |
.0595 |
1/16 |
.0625 |
48 |
.0760 |
46 |
.0810 |
| 2 |
.0860 |
56
C |
.0641 |
50 |
.0700 |
49 |
.0730 |
43 |
.0890 |
41 |
.0960 |
| 4 |
.1120 |
40
C |
.0813 |
43 |
.0890 |
41 |
.0960 |
32 |
.1160 |
30 |
.1285 |
| 6 |
.1380 |
32
C |
.0997 |
36 |
.1065 |
32 |
.1160 |
27 |
.1440 |
25 |
.1495 |
| 8 |
.1640 |
32
C |
.1257 |
29 |
.1360 |
27 |
.1440 |
18 |
.1695 |
16 |
.1770 |
| 10 |
.1900 |
24
C |
.1389 |
25 |
.1495 |
20 |
.1610 |
9 |
.1960 |
7 |
.2010 |
| 12 |
.2160 |
24
C |
.1649 |
16 |
.1770 |
12 |
.1890 |
2 |
.2210 |
1 |
.2280 |
| 1/4 |
.2500 |
20
C |
.1887 |
7 |
.2010 |
7/32 |
.2188 |
F |
.2570 |
H |
.2660 |
|
This
page and all contents are Copyright © 2003 by OER Inc., Reston,
Virginia, USA
|
|
