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1 1/2 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 .

29 results, (click on any line for more information)

Buy Square Head Bolts from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
HayesCASquare Head BoltSteelPlain1 1/2-6 x 11 3/81 1/2-6 x 11 3/8 square hd bolt pln4
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EndriesWISquare Head BoltGrade 2Plain1 1/2-6 x 6 1/21-1/2-6x6-1/2 grade 2 square head machine bolt plain40
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ACCURATEILSquare Head BoltSteelPlain1 1/2-6 x 18bolt square machine3
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ACCURATEILSquare Head BoltSteelPlain1 1/2-6 x 5 1/2bolt square machine2
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ACCURATEILSquare Head BoltSteelPlain1 1/2-6 x 12bolt square machine3
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AmericanNYSquare Head BoltSteelPlain1 1/2 x 7square bolt2
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MidStatesMISquare Head BoltGrade 8Plain1 1/2-6 x 8 1/2square hd bolt9
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CIFILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1 1/2-6 x 91 1/2-6x9 square head machine bolt 310 18-8 304 steel (3) (3)3
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/2-6 x 20bolt & c/s square boltb18.2.1100
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/2-12 x 5bolt & c/s square boltb18.2.1430
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BIG BOLTILSquare Head BoltGrade 8Plain1 1/2-6 x 20bolt & c/s square boltsquare b18.2.175
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/2-6 x 9bolt & c/s square boltb18.2.1300
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BIG BOLTILSquare Head BoltGrade 8Plain1 1/2-6 x 12bolt & c/s square boltsquare b18.2.1250
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/2-6 x 12bolt & c/s square boltsquare b18.2.1163
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/2-6 x 18bolt & c/s square boltb18.2.1100
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J&L INSquare Head BoltGrade 5Plain1 1/2-6 x 111/2 gr5 sq hd1.75tkx2 5/8atf1
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J&L INSquare Head BoltGrade 5Plain1 1/2-6 x 113/4 gr5 square hd bolt1
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B & K FASTPASquare Head BoltGrade 8Plain1 1/2-12 x 81 1/2-12 x 8 square bolts gr 8 plain b18.2.11
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CNBILSquare Head Bolt316, 317, A4 StainlessPlain1 1/2-6 x 10square m/b, 316 ss3
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CNBILSquare Head BoltSteelPlain1 1/2-6 x 31 1/2square m/b, 4140, ht to 250/280 bhn, 5 useable thread,1
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CNBILSquare Head Bolt316, 317, A4 StainlessPlain1 1/2-6 x 9square m/b, 316 ss1
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KBSTNSquare Head BoltGrade 8Plain1 1/2-6 x 121-1/2-6 x 12 square mach bolt gr-8 b18.2.125
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KBSTNSquare Head BoltGrade 8Plain1 1/2-6 x 61-1/2-6 x 6 square mach bolt gr-8 b18.2.131
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KBSTNSquare Head BoltGrade 8Plain1 1/2-6 x 71-1/2-6 x 7 square mach bolt gr-8 b18.2.11
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BRIGHBESTILSquare Head BoltSteelBlack Oxide1 1/2-6 x 31 1/2-6 x 3 sq hd black oxide28
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Valley NuWASquare Head BoltSteelPlain1 1/2bmi 150# square hd plug usa1
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Valley NuWASquare Head BoltSteelGalvanized1 1/2square hd plug usa1
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ACCURATEILSquare Head BoltSteelPlain1 1/2-6 x 12square m/b12
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ACCURATEILSquare Head BoltSteelPlain1 1/2-6 x 18square m/b11
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