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1/2 Square Nuts (ASME B18. 2.2)

Square Nuts are just four-sided nuts, but compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening. Square nuts are typically mated with square-headed bolts.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
BHAMALSquare NutSteelPlain1/2-131/2-13 reg. square nuts b18.2.285
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GLFOHSquare NutSteelPlain1/2-131/2-13 hvy square nut stl pln b18.2.2 () () ()210
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GLFOHSquare NutSteelGalvanized1/2-131/2-13 square nut stl hdg b18.2.2 () () ()2244
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AbabaCASquare NutSteelPlain1/2-131/2-13 sq nut stl pln b18.2.2863
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AbabaCASquare NutSteelZinc/Clear1/2-131/2-13 sq nut stl znc b18.2.250
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ASMCILSquare NutGrade 8Plain1/2-13coarse gr8 regular square nut med carb b18.2.221
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AbabaCASquare NutSteelPlain1/2-131/2-13 sq nut stl pln b18.2.2100
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Alma BoltMISquare NutSteelPlain1/2-131/2-13 plain finish square nut b18.2.22467
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JET FITTINGCASquare NutSteelPlain1/2-131/2-13 heavy square nut steel plain 50NQHP b18.2.2163
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StandardMASquare Nut316, 317, A4 StainlessPlain1/2-131/2-13 square nut 316 stainless steel b18.2.216640
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StandardMASquare NutBrassPlain1/2-131/2-13 square nut brass b18.2.28350
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General FMISquare NutSteelZinc/Clear1/21/2 sq nut w/handle clr zn gm4345m b18.2.250850
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QFCTXSquare NutSteelPlain1/2-131/2-13 square nut plain b18.2.240
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QFCTXSquare NutSteelPlain1/2-131/2-13 square nut plain b18.2.23000
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QFCTXSquare NutGrade 5Plain1/2-131/2-13 hvy square nut grade 5 plain b18.2.236
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QFCTXSquare NutSteelPlain1/2-131/2-13 sq nut overtapped .021 plain b18.2.2490
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QFCTXSquare NutSteelGalvanized1/2-131/2-13 square nut galvanized b18.2.2746
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QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut 18-8 s/s b18.2.25935
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QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut 18-8 s/s b18.2.2386
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QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut 18-8 s/s domestic b18.2.2230
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QFCTXSquare NutSteelPlain1/2-131/2-13 square nut tapped oversize plain b18.2.21150
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QFCTXSquare NutSteelPlain1/2-131/2-13 square nut tapped oversize plain finish domestic b18.2.221
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QFCTXSquare NutSteelPlain1/2-131/2-13 square nut tapped oversize plain finish domestic b18.2.22
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QFCTXSquare NutSteelPlain1/2-131/2-13 square nut tapped oversize plain finish domestic b18.2.2272
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QFCTXSquare NutSteelGalvanized1/2-13 x .0181/2-13 square nut hdg .018 o/s 100% domestic b18.2.212440
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QFCTXSquare NutSteelGalvanized1/2-13 x .0181/2-13 square nut hdg .018 o/s 100% domestic b18.2.2343
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QFCTXSquare NutSteelGalvanized1/2-13 x .0181/2-13 square nut hdg .018 o/s 100% domestic b18.2.28728
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QFCTXSquare NutSteelGalvanized1/2-13 x .0181/2-13 square nut hdg .018 o/s 100% domestic b18.2.2116165
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QFCTXSquare NutSteelGalvanized1/2-13 x .0181/2-13 square nut hdg .018 o/s 100% domestic b18.2.270000
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QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 13/161/2-13x13/16(.81)af square nut 18-8 100% domestic b18.2.21187
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QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 13/161/2-13x13/16(.81)af square nut 18-8 100% domestic b18.2.2595
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QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 13/161/2-13x13/16(.81)af square nut 18-8 100% domestic b18.2.2258
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B & K FASTPASquare NutSteelPlain1/2-131/2-13 heavy square nuts plain b18.2.2131
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B & K FASTPASquare NutSteelPlain1/2-131/2-13 square nuts plain b18.2.21583
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B & K FASTPASquare NutSteelZinc/Clear1/2-131/2-13 square nuts zinc b18.2.230
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B & K FASTPASquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 11/161/2-13 square nuts stainless 11/16 thk b18.2.24325
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General FMISquare NutGrade 2Plain1/2-131/2-13 hvy sq nut gr 2 b18.2.21241
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OSSCORISquare NutSteelZinc/Clear1/2-131/2-13 square nut plated b18.2.297
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PerigeeMISquare NutGrade APlain1/2-13 x 13/16 x 7/161/2-13 x 13/16 x 7/16 regular square nut b18.2.292
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JET FITTINGCASquare NutGrade 2Zinc/Clear1/2-13nut square 1/2-13 grade 2 steel zinc plated b18.2.2200
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THRDFASTFLSquare NutSteelZinc/Clear1/2-13square nut b18.2.239
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THRDFASTFLSquare NutSteelZinc/Clear1/2-13square nut b18.2.271
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THRDFASTFLSquare NutSteelGalvanized1/2-13square nut hdg b18.2.259
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THRDFASTTNSquare NutSteelZinc/Clear1/2-13square nut b18.2.2964
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THRDFASTTNSquare NutSteelPlain1/2-13square nut b18.2.250
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THRDFASTALSquare NutSteelPlain1/2-13square nut b18.2.246
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KBSTNSquare NutSilicon BronzePlain1/2-131/2-13 regular squarenut sili brze b18.2.2446
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KBSTNSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 regular squarenut s/s b18.2.21,182
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KBSTNSquare NutBrassPlain1/2-131/2-13 regular squarenut brass b18.2.22,986
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THRDFASTMSSquare NutSteelGalvanized1/2-13square nut hdg b18.2.225
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THRDFASTALSquare NutSteelPlain1/2-13square nut b18.2.210
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