Square Head Bolts
Square Head Bolts have square-shaped external wrenching heads, which offer a large bearing area for positive gripping. These are best used in tight or dark spaces where a machinist or fabricator must tighten the bolt blind.
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5/16"-18x1-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized
$0.76
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5/16"-18x1-1/2" Square Head Bolts Grade A307 Zinc Clear
$0.61
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5/16"-18x1-3/4" Square Head Bolts Grade A307 Zinc Clear
$0.69
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5/16"-18x1-3/4" Square Head Bolts Grade A307 Hot Dip Galvanized
$0.85
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5/16"-18x2" Square Head Bolts Grade A307 Hot Dip Galvanized
$0.92
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5/16"-18x2-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized
$1.12
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5/16"-18x2-1/2" Square Head Bolts Grade A307 Zinc Clear
$0.95
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5/16"-18x3" Square Head Bolts Grade A307 Hot Dip Galvanized
$1.32
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5/16"-18x3-1/2" Square Head Bolts Grade A307 Zinc Clear
$1.33
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5/16"-18x3-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized
$1.52
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5/16"-18x4" Square Head Bolts Grade A307 Hot Dip Galvanized
$1.74
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5/16"-18x5" Square Head Bolts Grade A307 Hot Dip Galvanized
$2.13
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5/16"-18x6" Square Head Bolts Grade A307 Hot Dip Galvanized
$2.50
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3/8"-16x3/4" Square Head Bolts Grade A307 Hot Dip Galvanized
$0.72
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3/8"-16x1" Square Head Bolts Grade A307 Hot Dip Galvanized
$0.88
