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3 1/4 inch length Square Head Bolts

Square Head Bolts were once the most common form of bolt, until they were replaced by hex head bolts. They are covered under ANSI Standard B18.2.1 and are now most commonly used for aesthetic purposes to provide a rustic look .

36 results, (click on any line for more information)
Buy Square Head Bolts from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
HayesCASquare Head BoltSteelPlain5/8-11 x 3 1/45/8-11 x 3 1/4 square hd bolt pln4
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HayesCASquare Head BoltSteelZinc/Clear1/2-13 x 3 1/41/2-13 x 3 1/4 square hd bolt zinc52
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ACCURATEILSquare Head BoltGrade 5Zinc/Clear5/8-11 x 3 1/4bolt square machine gr510
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ACCURATEILSquare Head BoltSteelPlain1/4-20 x 3 1/4bolt square machine200
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ACCURATEILSquare Head BoltSteelZinc/Clear1/4-20 x 3 1/4bolt square machine1500
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ACCURATEILSquare Head BoltSteelPlain7/8-9 x 3 1/4bolt square machine93
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ACCURATEILSquare Head BoltSteelZinc/Clear7/8-9 x 3 1/4bolt square machine42
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ACCURATEILSquare Head BoltSteelPlain3/4-10 x 3 1/4bolt square machine7
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LibertyILSquare Head BoltSteelZinc/Clear7/16-14 x 3 1/4square m/b 2 tl machine bolt 2 tl125
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LibertyILSquare Head BoltSteelPlain1/2-20 x 3 1/4square m/b machine bolt158
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AmericanNYSquare Head BoltSteelPlain1/2-13 x 3 1/4square m/b61
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AmericanNYSquare Head BoltSteelZinc/Yellow5/8-11 x 3 1/4square m/b zy75
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Alma BoltMISquare Head BoltGrade 2Plain3/4-10 x 3 1/4square bolt270
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XL ScrewGASquare Head BoltSteelPlain5/8-11 x 3 1/4square m/b std thrd fsb astm a307130
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XL ScrewGASquare Head BoltSteelZinc/Clear5/8-11 x 3 1/4square hd m/b std thrd fsb astm a307 zp130
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SunPackFLSquare Head BoltGrade ACadmium5/8-11 x 3 1/45/8-11x3 1/4 a307 square head machine bolt cad plated126
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IPCVASquare Head BoltGrade AZinc/Yellow3/4-10 x 3 1/43/4-10x3 1/4 square hd mach bolt a307 steel zinc yellow240
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BIG BOLTILSquare Head BoltGrade 5Plain1/2-13 x 3 1/4bolt & c/s square boltsquare b18.2.11000
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SunPackFLSquare Head BoltGrade ACadmium5/8-11 x 3 1/4a307 square m/b126
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ISSCOMOSquare Head BoltGrade 2Plain7/8-9 x 3 1/4308
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ISSCOMOSquare Head BoltGrade 2Plain3/4-10 x 3 1/4175
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ISSCOMOSquare Head BoltGrade 2Plain5/8-11 x 3 1/4575
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B & K FASTPASquare Head BoltSteelPlain1/2-13 x 3 1/41/2-13 x 3 1/4 square bolts plain b18.2.1495
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ArdenWISquare Head BoltSteelZinc/Clear3410 x 3 1/43410x3 1/4 square hd bolt zcinquire
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Kanebridge ILSquare Head BoltSteelPlain3/4-10 x 3 1/43/4-10x3 1/4 square machine bolt plain1.500
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FastWareSaskSquare Head BoltGrade 5Zinc/Yellow1/2-13 x 3 1/4nc square m/b 0.937 af 1 1/4 tl2,429
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SRFALSquare Head BoltGrade 2Plain7/8-9 x 3 1/4square hd bolt-
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SRFALSquare Head BoltGrade 2Plain3/4-10 x 3 1/4square hd bolt60
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KBSTNSquare Head BoltSteelPlain1/2-13 x 3 1/41/2-13 x 3 1/4 square hd mach.bolt b18.2.1303
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KBSTNSquare Head BoltGrade 8Plain3/4-10 x 3 1/43/4-10 x 3 1/4 square mach bolt gr-8 b18.2.178
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ACCURATEILSquare Head BoltSteelZinc/Clear5/8-11 x 3 1/4square m/b500
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ACCURATEILSquare Head BoltGrade 5Zinc/Clear5/8-11 x 3 1/4square m/b grad 51,000
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ACCURATEILSquare Head BoltSteelPlain7/8-9 x 3 1/4square m/b200
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ACCURATEILSquare Head BoltSteelZinc/Clear3/8-16 x 3 1/4square m/b250
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ACCURATEILSquare Head BoltSteelPlain3/4-10 x 3 1/4square m/b150
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ACCURATEILSquare Head BoltSteelZinc/Clear1/4-20 x 3 1/4square m/b1,700
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