3/8-16 Machine Bolts
Please select your bolt length and quantity from the table below.
Head size is 9/16", yes, we have 8-point sockets.
Extra-long and custom length Square Head Machine Bolts, and Stay Bolts, are found on our Long Bolts page.
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Lengths, Prices & Quantities
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| Product Number |
Length |
Finish |
Each |
Buy 10 |
Buy 25 |
Buy 50 |
Buy 100 |
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| 37SQMB050BO |
1/2" |
Black Oxide |
$0.17 |
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| 37SQMB075BO |
3/4" |
Black Oxide |
$0.19 |
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| 37SQMB100BO |
1" |
Black Oxide |
$0.21 |
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| 37SQMB100PL |
1" |
Plain |
$0.20 |
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| 37SQMB125BO |
1-1/4" |
Black Oxide |
$0.25 |
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| 37SQMB125PL |
1-1/4" |
Plain |
$0.24 |
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| 37SQMB150BO |
1-1/2" |
Black Oxide |
$0.30 |
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| 37SQMB150PL |
1-1/2" |
Plain |
$0.27 |
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| 37SQMB175BO |
1-3/4" |
Black Oxide |
$0.30 |
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23 in stock |
| 37SQMB175PL |
1-3/4" |
Plain |
$0.29 |
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| 37SQMB200PL |
2" |
Plain |
$0.30 |
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| 37SQMB225BO |
2-1/4" |
Black Oxide |
$0.32 |
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| 37SQMB275PL* |
2-3/4" |
Plain |
$0.36 |
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| 37SQMB300BO |
3" |
Black Oxide |
$0.42 |
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| 37SQMB325PL |
3-1/4" |
Plain |
$0.44 |
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26 in stock |
| 37SQMB350BO |
3-1/2" |
Black Oxide |
$0.48 |
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| 37SQMB350PL |
3-1/2" |
Plain |
$0.46 |
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| 37SQMB400BO |
4" |
Black Oxide |
$0.50 |
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| 37SQMB500BO |
5" |
Black Oxide |
$0.65 |
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53 in stock |
| 37SQMB500PL |
5" |
Plain |
$0.60 |
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65 in stock |
| 37SQMB550BO |
5-1/2" |
Black Oxide |
$0.75 |
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180 in stock |
| 37SQMB550PL |
5-1/2" |
Plain |
$0.70 |
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25 in stock |
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If a Quantity has no ADD TO CART button, there is insufficient inventory.
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