|
BA |
BSC |
BSF |
BSP |
BSTP |
BSW |
CEI |
UNC |
UNF |
ME |
BSB
UNF - Unified Fine Thread
diameter
in
inches |
T
P I |
Pitch |
Major
Diameter |
Root
Diameter
Internal Threads |
Root
Diameter
External Threads |
Tapping
Drill Size |
| number
0 |
80 |
0.0125 |
0.06 |
0.0465 |
0.0447 |
1.25
mm
(0.0492 inch) |
| number
1 |
72 |
0.0139 |
0.073 |
0.058 |
0.056 |
Number
Drill 52
(1.6 mm) |
| number
2 |
64 |
0.0156 |
0.086 |
0.0691 |
0.0668 |
Number
Drill 48
(1.9 mm) |
| number
3 |
56 |
0.0179 |
0.099 |
0.0797 |
0.0771 |
2.15
mm
(0.0846 inch) |
| number
4 |
48 |
0.0208 |
0.112 |
0.0894 |
0.0864 |
2.4
mm
(0.0945 inch) |
| number
5 |
44 |
0.0227 |
0.125 |
0.1004 |
0.0971 |
Number
Drill 36
(2.7 mm) |
| number
6 |
40 |
0.025 |
0.138 |
0.1109 |
0.1073 |
Number
Drill 32
(2.95mm) |
| number
8 |
36 |
0.0278 |
0.164 |
0.1339 |
0.1299 |
3.55
mm
(0.1398 inch) |
| number
10 |
32 |
0.0313 |
0.19 |
0.1562 |
0.1517 |
Number
Drill 21
(4.1 mm) |
| number
12 |
28 |
0.0357 |
0.216 |
0.1773 |
0.1722 |
4.65
mm
(0.1831 inch) |
| 1/4 |
28 |
0.0357 |
_ |
0.2113 |
0.2062 |
5.5
mm
(0.2165 inch) |
| 5/16 |
24 |
0.0417 |
_ |
0.2674 |
0.2614 |
6.9
mm
(0.2717 inch) |
| 3/8 |
24 |
0.0417 |
_ |
0.3299 |
0.3239 |
8.5
mm
(0.3346 inch) |
| 7/16 |
20 |
0.05 |
_ |
0.3834 |
0.3762 |
9.9
mm
(0.3898 inch) |
| 1/2 |
20 |
0.05 |
_ |
0.4459 |
0.4387 |
11.4
mm
(0.4488 inch) |
| 9/16 |
18 |
0.0556 |
_ |
0.5024 |
0.4943 |
12.9
mm
(0.5079 inch) |
| 5/8 |
18 |
0.0556 |
_ |
0.5649 |
0.5568 |
14.5
mm
(0.5709 inch) |
| 3/4 |
16 |
0.0625 |
_ |
0.6823 |
0.6733 |
11/16
inch
(17.46 mm) |
| 7/8 |
14 |
0.0714 |
_ |
0.7977 |
0.7874 |
25/32
inch
(19.84 mm) |
| 1
inch |
12 |
0.0833 |
_ |
0.9098 |
0.8978 |
23.25
mm
(0.9154 inch) |
|
|
