MS35764F
TABLE III. Grade 8 - Reference Information Only.
NOMINAL SIZE |
THREADS PER INCH |
PROOF LOAD LBS (MIN) |
RECOMMENDED AXIAL LOAD (LBS) |
*RECOMMENDED TIGHTENING TORQUE (FT - LBS) |
.250 |
20 28 |
3800 4350 |
2850 3263 |
11 14 |
.3125 |
18 24 |
6300 6950 |
4725 5213 |
21.5 27 |
.375 |
16 24 |
9300 10550 |
6975 7913 |
40.5 55 |
.500 |
13 20 |
17050 19200 |
12788 14363 |
102 126 |
.625 |
11 18 |
27100 30700 |
20325 23025 |
212 263 |
.750 |
10 16 |
40100 44750 |
30075 33563 |
390 464 |
1.000 |
8 12 |
72700 79550 |
54525 59663 |
889 1050 |
1.250 |
7 12 |
116300 128750 |
87225 96563 |
1956 2253 |
NOTES:
1. |
Torque based on 0.2 coefficient of friction. |
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2. |
Torque and axial load based upon 75% of proof load value. |
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3. |
The self-locking feature of these bolts is full effective when tightened to the torque values shown herein. |
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Lockwashers or locknuts are not needed. (See note 5) |
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" |
4. |
Torque values are to be shown adjacent the bolt part number callouts upon assembly drawings. They are subject to upward or downward revision by the agency responsible for the assembly drawings when the |
tightening fraction coefficient for specific applications is found to vary from as shown in (1) above. |
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5. |
Where material softer than the bolt material is fastened, plain washer of material as hard as the bolt of |
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adequate thickness and larger in diameter than the bolt shall be used under the bolt head. |
5
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