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18 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 .

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

Buy Square Head Bolts from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
ACCURATEILSquare Head BoltSteelPlain7/8-9 x 18bolt square machine4
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ACCURATEILSquare Head BoltSteelPlain3/4-10 x 18bolt square15
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ACCURATEILSquare Head BoltSteelPlain1 1/2-6 x 18bolt square machine3
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BIG BOLTILSquare Head BoltGrade 5Plain1-14 x 18bolt & c/s square boltb18.2.1400
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BIG BOLTILSquare Head BoltGrade 5Plain1 3/8-12 x 18bolt & c/s square boltb18.2.1200
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BIG BOLTILSquare Head BoltGrade 8Plain1 1/4-7 x 18bolt & c/s square boltsquare b18.2.1500
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/4-12 x 18bolt & c/s square boltb18.2.1463
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/2-6 x 18bolt & c/s square boltb18.2.1100
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QFCTXSquare Head BoltGrade AGalvanized3/4-10 x 183/4-10x18 square head bolt a307 hdg 6 thd b18.2.156
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QFCTXSquare Head BoltGrade AGalvanized7/8-9 x 187/8-9x18 square head bolt a307 hdg b18.2.110
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MastBoltOHSquare Head BoltGrade 5Plain3/4 x 183/4x18 square hd bolt with 2 of thread200 pcs
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MastBoltOHSquare Head BoltGrade 5Plain3/4 x 183/4x18 square hd bolt with 2 of thread200
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B & K FASTPASquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1-8 x 181-8 x 18 square bolts t-304 stainless b18.2.11
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LippinCASquare Head BoltSteelPlain3/4-10 x 18square head bolt plain36
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THRDFASTFLSquare Head BoltSteelGalvanized7/8-9 x 18square hd bolt rt6 hdg b18.2.110
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THRDFASTFLSquare Head BoltSteelPlain5/8-11 x 18a-bolt w/nut & sq washer b18.2.15
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THRDFASTALSquare Head BoltSteelGalvanized5/8-11 x 18square hd bolt rt6 hdg b18.2.13
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KBSTNSquare Head BoltGrade 8Plain1-8 x 181-8 x 18 square mach bolt gr-8 b18.2.128
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ACCURATEILSquare Head BoltSteelPlain7/8-9 x 18square m/b25
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ACCURATEILSquare Head BoltSteelPlain3/4-10 x 18square m/b85
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ACCURATEILSquare Head BoltSteelPlain1 1/2-6 x 18square m/b11
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