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Description:
A one-piece hex-washer head bolt with a flat bearing surface, made of high-alloy steel.
Advantages:
For use on truck frames. The flange eliminates washers and helps compensate for a misaligned hole. Used with a Grade-Gt locknut, the bolt system resists bolt slippage by distributing the clamp load over a wide area.
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Frame Bolts
FRAME BOLTS • GRADE 8 ALLOY IFI 111 & SAE J429 |
Nom
Size |
E |
F |
G |
B |
U |
B |
H |
Lt |
Tensile
Str.
Lbs. |
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Width Across
Corners |
Flange
Diam. |
Flange
Thk. |
Head
Hgt. |
Hex
Hgt. |
Thread
Length |
Max |
Min |
Basic |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Basic |
1/4 |
0.2500 |
0.2450 |
3/8 |
0.3750 |
0.367 |
0.433 |
0.409 |
0.56 |
0.04 |
0.28 |
0.17 |
0.750 |
4,750 |
3,800 |
5/16 |
0.3125 |
0.3065 |
1/2 |
0.5000 |
0.489 |
0.577 |
0.548 |
0.68 |
0.05 |
0.32 |
0.21 |
0.875 |
7,850 |
6,300 |
3/8 |
0.3750 |
0.3690 |
9/16 |
0.5625 |
0.551 |
0.650 |
0.618 |
0.81 |
0.06 |
0.425 |
0.25 |
1.000 |
11,600 |
9,300 |
7/16 |
0.4375 |
0.4305 |
5/8 |
0.6250 |
0.612 |
0.722 |
0.685 |
0.93 |
0.07 |
0.46 |
0.30 |
1.125 |
15,900 |
12,800 |
1/2 |
0.5000 |
0.4930 |
3/4 |
0.7500 |
0.736 |
0.866 |
0.825 |
1.07 |
0.08 |
0.555 |
0.34 |
1.250 |
21,300 |
17,000 |
5/8 |
0.6250 |
0.6170 |
15/16 |
0.9375 |
0.922 |
1.083 |
1.034 |
1.33 |
0.10 |
0.690 |
0.42 |
1.500 |
33,900 |
27,100 |
3/4 |
0.7500 |
0.7410 |
1-1/8 |
1.1250 |
1.100 |
1.299 |
1.234 |
1.59 |
0.11 |
0.825 |
0.51 |
1.750 |
50,100 |
40,100 |
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Nominal Bolt Length |
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Over 1 in.
to
2-1/2 in., incl.
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Over 2-1/2 in. to
4 in., incl. |
| 1/4 to 3/8 |
-0.03 |
-0.04 |
-0.06 |
| 7/16 and 1/2 |
-0.03 |
-0.06 |
-0.08 |
| 5/8 and 3/4 |
-0.03 |
-0.08 |
-0.10 |
‡Length of a frame bolt is measured from the underhead bearing surface to the extreme
end of the screw.
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Email: 
sales@fastenerz.com
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