Square Head Bolts, 300 Stainless (A1,A2, 18-8,304,310 etc.)

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 .

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
HayesCASquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 1 1/4square hd bolt 18-8ss44
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HayesCASquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 2 1/2square hd bolt 18-8ss8
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ACFCASquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 11/4-20x1 s/s square head bolt with groove ( print )33
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 1/2bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.11000
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 4bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.11500
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 6bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1400
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 6bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1500
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1500
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1500
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 5bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1400
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 6 1/2bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1200
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 2 1/2bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1500
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-18 x 10bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)b18.2.1500
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 1/2bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1500
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 5bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1500
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-18 x 12bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)b18.2.1300
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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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Spring BoTXSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 5/81/2(13) x 5/8 square head bolt 304 s/s b18.2.1 b18.2.1 usainquire
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Spring BoTXSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 1/21/2(13) x 1-1/2 square head bolt 304l s/s b18.2.1 b18.2.1 usainquire
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Spring BoTXSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 41/2(13) x 4 square head bolt 304 s/s fully threaded b18.2.1 b18.2.1 usainquire
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Spring BoTXSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 1/21/2(13) x 1-1/2 square head bolt 304l s/s b18.2.1 usainquire
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Spring BoTXSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 5/81/2(13) x 5/8 square head bolt 304 s/s b18.2.1 usainquire
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Spring BoTXSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 41/2(13) x 4 square head bolt 304 s/s fully threaded b18.2.1 usainquire
    Contact_Supplier
OBRIENOHSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2 x 1/2 x 1foot sq kystk s/s90
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OBRIENOHSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 7square m/b 18-8 304108
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WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Zinc/Clear5/8-11 x 45/8-11 x 4 sq hd ss cp pt zinc b18.2.114
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WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 83/4-10 x 8 sq hd ss cp pt pln b18.2.113
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WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 31/2-13 x 3 sq hd ss cp pt pln b18.2.19
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WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3/41/4-20 x 3/4 sq hd ss cp pt b18.2.150
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WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 2 1/21/2-13 x 2 1/2 sq hd ss cp pt pln b18.2.137
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WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 43/4-10 x 4 sq hd ss b18.2.125
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WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 81/2-13 x 8 sq hd ss cp pt b18.2.11
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WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Zinc/Clear3/4-10 x 23/4-10 x 2 sq hd ss cp pt zinc b18.2.1130
    Contact_Supplier
WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Zinc/Clear3/8-16 x 3/43/8-16 x 3/4 sq hd ss cp pt zinc b18.2.1158
    Contact_Supplier
WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Zinc/Clear3/4-10 x 33/4-10 x 3 sq hd ss cp pt zinc b18.2.11
    Contact_Supplier
WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 61/2-13 x 6 sq hd ss cp pt pln b18.2.11
    Contact_Supplier
WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain7/8-9 x 57/8-9 x 5 sq hd ss cp pt b18.2.12
    Contact_Supplier
WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3 1/21/2-13 x 3 1/2 sq hd ss cp pt pln b18.2.120
    Contact_Supplier
WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Zinc/Clear1/2-13 x 11/2-13 x 1 sq hd ss cp pt zinc b18.2.1200
    Contact_Supplier
WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 55/8-11 x 5 sq hd ss cp pt plain b18.2.122
    Contact_Supplier
WMTSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 25/16-18 x 2 sq hd ss cp pt b18.2.19
    Contact_Supplier
WSBKYSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 2blt sqr (18-8) 1/2-13x2 b18.2.147
    Contact_Supplier
LibertyILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 1/2square m/b 18-8s/s m/b 18-8s/s23
    Contact_Supplier
LibertyILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain7/8-9 x 5square m/b 18-8 s/s bolt 18-8 s/s2
    Contact_Supplier
LibertyILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1-8 x 7square machine bo lt 304s/s lt 304s/s4
    Contact_Supplier
LibertyILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 2 1/2square m/b 18-8 s/s90
    Contact_Supplier
LibertyILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 2 1/2square m/b 18-8 st m/b 18-8 st40
    Contact_Supplier
ISSCOMOSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-28 x 1 1/218-8120
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JacksonMSSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2304 ss square plug (part# 62-653)10
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JacksonMSSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain11 304 ss square plug18
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JacksonMSSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/8304 ss square plug (part# 62670)36
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EndriesWISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 2 1/2Square hd machine bolt3618
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CIFILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 2 1/25/8-11 x 2 1/2 square head machine bolt 310 stainless steel119
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CIFILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 2 3/45/8-11 x 2 3/4 square head machine bolt 310 stainless steel97
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CIFILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1 1/2-6 x 91 1/2-6 x 9 square head machine bolt 310 stainless steel3
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CIFILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 3 1/4square m/b, 18-8 s/s5
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CIFILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1-8 x 3 1/2square m/b, 18-83
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CIFILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1-8 x 4square m/b, 18-819
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FasSpcMfgFLSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 2 1/2square m/b 18-8 s/s1
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FasSpcMfgFLSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 1 1/2square m/b 18-8 s/s5
    Contact_Supplier
FasSpcMfgFLSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3square m/b 18-8 s/s1
    Contact_Supplier
J&L INSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 2 5/818-8 304 square hd m/b28
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WDMBIASquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 1/4square hd mach bolt s/s109
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WDMBIASquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 2 3/4sq mach bolt 18-8s/s p.t.1750
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ACCURATEILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-32 x 1square m/b 18-8ss5,000
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Bolts PlusOntSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 2 1/2square m/b 18.8 18-8 30419
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3/4Square head set screw cup point12
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 2Square head set screw cup point STAINLESS STEEL19
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 2Square head set screw cup point STAINLESS STEEL150
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 1 1/4Square head set screw cup point STAINLESS STEEL17
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 1 1/2Square head set screw cup point STAINLESS STEEL48
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 2 1/4Square head set screw cup point STAINLESS STEEL5
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 2Square head set screw cup point STAINLESS STEEL400
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 4Square head set screw cup point STAINLESS STEEL75
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 1/2Square head set screw cup point STAINLESS STEEL225
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 2Square head set screw cup point STAINLESS STEEL200
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 2 1/2Square head set screw cup point STAINLESS STEEL50
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3Square head set screw cup point STAINLESS STEEL25
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3 1/2Square head set screw cup point STAINLESS STEEL175
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