|
ASTM A307
Threaded Rods-NINGBO BOLT |
ASTM A307 Threaded Rods
D
- the nominal diameter of the thread
Dimensions of ASTM
A307 - Threaded Rods
|
Coarse Thread
Series—UNC |
Fine Thread
Series—UNF |
8-Thread
Series—8UN |
|
Nominal Size
and Threads Per In. |
Basic Pitch
Dia. |
Section at
Minor Dia. |
Tensile
Stress Area |
Nominal Size
and Threads Per In. |
Basic Pitch
Dia. |
Section at
Minor Dia. |
Tensile
Stress Area |
Nominal Size
and Threads Per In. |
Basic Pitch
Dia. |
Section at
Minor Dia. |
Tensile
Stress Area |
|
In. |
Sq in. |
Sq in. |
In. |
Sq in. |
Sq in. |
In. |
Sq in. |
Sq in. |
|
1/4 - 20 |
0.2175 |
0.0269 |
0.0318 |
1/4 - 28 |
0.2268 |
0.0326 |
0.0364 |
– – |
– |
– |
– |
|
5/16 - 18 |
0.2764 |
0.0454 |
0.0524 |
5/16 - 24 |
0.2854 |
0.0524 |
0.0580 |
– – |
– |
– |
– |
|
3/8 - 16 |
0.3344 |
0.0678 |
0.0775 |
3/8 - 24 |
0.3479 |
0.0809 |
0.0878 |
– – |
– |
– |
– |
|
7/16 - 14 |
0.3911 |
0.0933 |
0.1063 |
7/16 - 20 |
0.4050 |
0.1090 |
0.1187 |
– – |
– |
– |
– |
|
1/2 - 13 |
0.4500 |
0.1257 |
0.1419 |
1/2 - 20 |
0.4675 |
0.1486 |
0.1599 |
– – |
– |
– |
– |
|
9/16 - 12 |
0.5084 |
0.162 |
0.182 |
9/16 - 18 |
0.5264 |
0.189 |
0.203 |
– – |
– |
– |
– |
|
5/8 - 11 |
0.5660 |
0.202 |
0.226 |
5/8 - 18 |
0.5889 |
0.240 |
0.256 |
– – |
– |
– |
– |
|
3/4 - 10 |
0.6850 |
0.302 |
0.334 |
3/4 - 16 |
0.7094 |
0.351 |
0.373 |
– – |
– |
– |
– |
|
7/8 - 9 |
0.8028 |
0.419 |
0.462 |
7/8 - 14 |
0.8286 |
0.180 |
0.509 |
– – |
– |
– |
– |
|
1 - 8 |
0.9188 |
0.551 |
0.606 |
1 - 12 |
0.9459 |
0.625 |
0.663 |
1 - 8 |
0.9188 |
0.551 |
0.606 |
|
1 1/8 - 7 |
1.0322 |
0.693 |
0.763 |
1 1/8 - 12 |
1.0709 |
0.812 |
0.856 |
1 1/8 - 8 |
1.0438 |
0.728 |
0.790 |
|
1 1/4 - 7 |
1.1572 |
0.890 |
0.969 |
1 1/4 - 12 |
1.1959 |
1.024 |
1.073 |
1 1/4 - 8 |
1.1688 |
0.929 |
1.000 |
|
1 3/8 - 6 |
1.2667 |
1.054 |
1.155 |
1 3/8 - 12 |
1.3209 |
1.260 |
1.315 |
1 3/8 - 8 |
1.2938 |
1.155 |
1.233 |
|
1 1/2 - 6 |
1.3917 |
1.294 |
1.405 |
1 1/2 - 12 |
1.4459 |
1.521 |
1.581 |
1 1/2 - 8 |
1.4188 |
1.405 |
1.492 |
|
– – |
– |
– |
– |
– – |
– |
– |
– |
1 5/8 - 8 |
1.5438 |
1.68 |
1.78 |
|
1 3/4 - 5 |
1.6201 |
1.74 |
1.90 |
– – |
– |
– |
– |
1 3/4 - 8 |
1.6688 |
1.98 |
2.08 |
|
– – |
– |
– |
– |
– – |
– |
– |
– |
1 7/8 - 8 |
1.7938 |
2.30 |
2.41 |
|
2 - 4.5 |
1.8557 |
2.30 |
2.50 |
– – |
– |
– |
– |
2 - 8 |
1.9188 |
2.65 |
2.77 |
|
2 1/4 - 4.5 |
2.1057 |
3.02 |
3.25 |
– – |
– |
– |
– |
2 1/4 - 8 |
2.1688 |
3.42 |
3.56 |
|
2 1/2 - 4 |
2.3376 |
3.72 |
4.00 |
– – |
– |
– |
– |
2 1/2 - 8 |
2.4188 |
4.29 |
4.44 |
|
2 3/4 - 4 |
2.5876 |
4.62 |
4.93 |
– – |
– |
– |
– |
2 3/4 - 8 |
2.6688 |
5.26 |
5.43 |
|
3 - 4 |
2.8376 |
5.62 |
5.97 |
– – |
– |
– |
– |
3 - 8 |
2.9188 |
6.32 |
6.51 |
|
3 1/4 - 4 |
3.0876 |
6.72 |
7.10 |
– – |
– |
– |
– |
3 1/4 - 8 |
3.1688 |
7.49 |
7.69 |
|
3 1/2 - 4 |
3.3376 |
7.92 |
8.33 |
– – |
– |
– |
– |
3 1/2 - 8 |
3.4188 |
8.75 |
8.96 |
|
3 3/4 - 4 |
3.5876 |
9.21 |
9.66 |
– – |
– |
– |
– |
3 3/4 - 8 |
3.6688 |
10.11 |
10.34 |
|
4 - 4 |
3.8376 |
10.61 |
11.08 |
– – |
– |
– |
– |
4 - 8 |
3.9188 |
11.57 |
11.81 |
The thread pitch is
the distance, measured parallel to its axis, between corresponding points on
adjacent surfaces, in the same axial plane.
The major diameter of
a thread is the distance that touches the crest of an external thread.
The minor diameter (root
diameter) is the diameter of a cylinder that just touches the roots of an
external thread.
The crest of
a thread is the top portion of a thread.
The root is
the lowest groove between the two flanks of the thread.
The flanks of
a thread are the sides that connect the crest and the root.
The angle of
a thread is the angle between the flanks, measured in an axial plane section.
The thread run-out describes
the end of the threaded portion which is not cut or rolled to the full depth and
provides a transition to bolt shank.
Dimensions of
Threaded rods
|
Screw Size |
Class |
Major
Diameter |
Pitch
Diameter |
Minor
Diameter |
|
Diameter |
Thread |
Max. |
Min. |
Max. |
Min. |
Max. |
|
1/4-20 |
2A |
0.2489 |
0.2408 |
0.2164 |
0.2127 |
0.1876 |
|
1/4-28 |
2A |
0.2490 |
0.2425 |
0.2258 |
0.2225 |
0.2052 |
|
5/16-18 |
2A |
0.3113 |
0.3026 |
0.2752 |
0.2712 |
0.2431 |
|
5/16-24 |
2A |
0.3114 |
0.3042 |
0.2843 |
0.2806 |
0.2603 |
|
3/8-16 |
2A |
0.3737 |
0.3643 |
0.3331 |
0.3287 |
0.2970 |
|
3/8-24 |
2A |
0.3739 |
0.3667 |
0.3468 |
0.3430 |
0.3228 |
|
7/16-14 |
2A |
0.4361 |
0.4258 |
0.3897 |
0.3850 |
0.3485 |
|
7/16-20 |
2A |
0.4362 |
0.4281 |
0.4037 |
0.3995 |
0.3749 |
|
1/2-13 |
2A |
0.4985 |
0.4876 |
0.4485 |
0.4435 |
0.4041 |
|
1/2-20 |
2A |
0.4987 |
0.4906 |
0.4662 |
0.4619 |
0.4374 |
|
9/16-12 |
2A |
0.5609 |
0.5495 |
0.5068 |
0.5016 |
0.4617 |
|
9/16-14 |
2A |
0.5510 |
0.5507 |
0.5146 |
0.5096 |
0.4760 |
|
9/16-16 |
2A |
0.5611 |
0.5517 |
0.5205 |
0.5158 |
0.4866 |
|
9/16-18 |
2A |
0.5611 |
0.5524 |
0.5250 |
0.5205 |
0.4950 |
|
9/16-20 |
2A |
0.5612 |
0.5531 |
0.5287 |
0.5245 |
0.5017 |
|
9/16-24 |
2A |
0.5613 |
0.5541 |
0.5342 |
0.5303 |
0.5117 |
|
9/16-32 |
2A |
0.5615 |
0.5555 |
0.5412 |
0.5377 |
0.5243 |
|
5/8-11 |
2A |
0.6234 |
0.6113 |
0.5644 |
0.5589 |
0.5119 |
|
5/8-18 |
2A |
0.6236 |
0.6149 |
0.5875 |
0.5828 |
0.5554 |
|
3/4-10 |
2A |
0.7482 |
0.7353 |
0.6832 |
0.6773 |
0.6255 |
|
3/4-16 |
2A |
0.7485 |
0.7391 |
0.7079 |
0.7029 |
0.6718 |
|
7/8 -9 |
2A |
0.8731 |
0.8592 |
0.8009 |
0.7946 |
0.7368 |
|
7/8-14 |
2A |
0.8734 |
0.8631 |
0.8270 |
0.8216 |
0.7858 |
|
1 -8 |
2A |
0.9980 |
0.9830 |
0.9168 |
0.9100 |
0.8446 |
|
1 -12 |
2A |
0.9982 |
0.9868 |
0.9441 |
0.9382 |
0.8960 |
|
1 1/8-7 |
2A |
1.1228 |
1.1064 |
1.0300 |
1.0228 |
0.9475 |
|
1 1/8-8 |
2A |
1.1229 |
1.1079 |
1.0417 |
1.0348 |
0.9741 |
|
1 1/8-12 |
2A |
1.1232 |
1.1118 |
1.0691 |
1.0631 |
1.0210 |
|
1 1/4-7 |
2A |
1.2478 |
1.2314 |
1.1550 |
1.1476 |
1.0725 |
|
1 1/4-8 |
2A |
1.2479 |
1.2329 |
1.1667 |
1.1597 |
1.0991 |
|
1 1/4-12 |
2A |
1.2482 |
1.2368 |
1.1941 |
1.1879 |
1.1460 |
|
1 3/8-6 |
2A |
1.3726 |
1.3544 |
1.2643 |
1.2563 |
1.1681 |
|
1 3/8-8 |
2A |
1.3728 |
1.3578 |
1.2916 |
1.2844 |
1.2240 |
|
1 3/8-12 |
2A |
1.3731 |
1.3617 |
1.3190 |
1.3127 |
1.2709 |
|
1 1/2-6 |
2A |
1.4976 |
1.4794 |
1.3893 |
1.3812 |
1.2931 |
|
1 1/2-8 |
2A |
1.4978 |
1.4828 |
1.4166 |
1.4093 |
1.3490 |
|
1 1/2-12 |
2A |
1.4981 |
1.4867 |
1.4440 |
1.4376 |
1.3959 |
|
1 3/4-5 |
2A |
1.7473 |
1.7268 |
1.6174 |
1.6085 |
1.5019 |
|
1 3/4-8 |
2A |
1.7477 |
1.7327 |
1.6665 |
1.6590 |
1.5989 |
|
1 7/8-8 |
2A |
1.8727 |
1.8577 |
1.7915 |
1.7838 |
1.7239 |
|
2-4.5 |
2A |
1.9971 |
1.9751 |
1.8528 |
1.8433 |
1.7324 |
|
2-8 |
2A |
1.9977 |
1.9827 |
1.9165 |
1.9087 |
1.8439 |
|
2 1/4-4.5 |
2A |
2.2471 |
2.2251 |
2.1028 |
2.0931 |
1.9824 |
|
2 1/4-8 |
2A |
2.2476 |
2.2326 |
2.1664 |
2.1584 |
2.0988 |
|
2 1/2-4 |
2A |
2.4969 |
2.4731 |
2.3345 |
2.3241 |
2.1992 |
|
2 1/2-8 |
2A |
2.4976 |
2.4826 |
2.4164 |
2.4082 |
2.3488 |
|
2 3/4-4 |
2A |
2.7468 |
2.7230 |
2.5844 |
2.5739 |
2.4491 |
|
2 3/4-8 |
2A |
2.7475 |
2.7325 |
2.6663 |
2.6580 |
2.5987 |
|
3-4 |
2A |
2.9968 |
2.9730 |
2.8344 |
2.8237 |
2.6991 |
|
3-8 |
2A |
2.9974 |
2.9824 |
2.9162 |
2.9077 |
2.8486 |
|
3 1/4-4 |
2A |
3.2467 |
3.2229 |
3.0843 |
3.0734 |
2.9490 |
|
3 1/4-8 |
2A |
3.2474 |
3.2324 |
3.1662 |
3.1575 |
3.0986 |
|
3 1/2-4 |
2A |
3.4967 |
3.4729 |
3.3343 |
3.3233 |
3.1990 |
|
3 1/2-8 |
2A |
3.4974 |
3.4824 |
3.4162 |
3.4074 |
3.3486 |
|
3 3/4-4 |
2A |
3.7466 |
3.7228 |
3.5842 |
3.5730 |
3.4489 |
|
3 3/4-8 |
2A |
3.7473 |
3.7323 |
3.6661 |
3.6571 |
3.5985 |
|
4-4 |
2A |
3.9966 |
3.9728 |
3.8342 |
3.8229 |
3.6989 |
|
4-8 |
2A |
3.9973 |
3.9823 |
3.9161 |
3.9070 |
3.8485 |
|
