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Square Nuts (ANSI 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.

90 Square Nut (ansi b18.2.2), showing 200, (click on any line for more information)

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
Irwin IndOntSquare NutGrade 5Zinc/Clear3/8-163/8-16 regular square nut gr 5 steel zinc trivalent clear b18.2.2300
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BHAMALSquare NutSteelGalvanized7/8-97/8-9 reg. square nuts hdg b18.2.29
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BHAMALSquare NutSteelGalvanized1-81-8 reg sq nut hdg b18.2.2105
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BHAMALSquare NutSteelPlain1/2-131/2-13 reg. square nuts b18.2.285
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BHAMALSquare NutGrade 8Plain1-81-8 square nut gr 8 b18.2.210
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BHAMALSquare NutSteelPlain5/8-11 x 35/8-11x3 sq antiro t-hd w/nut c111 b18.2.275
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AbabaCASquare NutSteelGalvanized1-81-8 sq nut stl hdg b18.2.2331
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AbabaCASquare NutSteelZinc/Clear1-81-8 sq nut stl znc b18.2.210
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AbabaCASquare NutSteelZinc/Clear#10-2410-24 sq nut stl znc b18.2.23000
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AbabaCASquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-3210-32 sq nut s/s b18.2.21100
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AbabaCASquare NutSteelZinc/Clear#10-3210-32 sq nut stl znc b18.2.2605
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AbabaCASquare NutSteelPlain1 1/8-71 1/8-7 sq nut stl pln b18.2.25
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AbabaCASquare NutSteelPlain1 1/4-71 1/4-7 sq nut stl pln b18.2.21
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AbabaCASquare NutSteelPlain1 1/2-61 1/2-6 sq nut stl pln b18.2.24
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AbabaCASquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-201/4-20 sq nut s/s b18.2.210750
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AbabaCASquare NutSteelGalvanized1/4-201/4-20 sq nut stl hdg b18.2.274
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AbabaCASquare NutSteelPlain1/4-201/4-20 sq nut stl pln b18.2.24175
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AbabaCASquare NutSteelBlack Oxide1/4-201/4-20 sq nut stl blk ox wax b18.2.2978
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AbabaCASquare NutSteelZinc/Clear1/4-201/4-20 sq nut stl znc b18.2.22798
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AbabaCASquare NutSteelZinc/Clear1/4-201/4-20 sq nut chamfered one side stl znc b18.2.22700
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AbabaCASquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-185/16-18 sq nut s/s b18.2.21684
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AbabaCASquare NutSteelZinc/Clear5/16-185/16-18 sq nut stl znc b18.2.21200
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AbabaCASquare NutSteelPlain3/8-163/8-16 sq nut stl pln b18.2.21312
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AbabaCASquare NutSteelZinc/Clear3/8-163/8-16 sq nut stl znc b18.2.250
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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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SIIINSquare NutSteelPlain1-81-8 plain square nut b18.2.2125
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SIIINSquare NutGrade 2Plain3/4-103/4-10 square nuts grade 2 plain b18.2.2100
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SIIINSquare NutGrade APlain5/8-115/8-11 grade a plain finish steel regular square nut b18.2.246
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IRFNCSquare NutGrade 2Plain1 1/4-71-1/4-7 square nut grade 2 b18.2.2 sae j995 steel plain180
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QFCTXSquare NutSteelPlain3/4 x 6 1/23/4x6 1/2 t-o sb w/fin & sq nt b18.2.21164
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QFCTXSquare NutSteelPlain1/4-201/4-20 square nut a563 a plain finish b18.2.254
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QFCTXSquare NutSteelPlain5/165/16nc plain square nut 321032 b18.2.2152
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QFCTXSquare NutSteelPlain3/8-163/8-16 square nut plain b18.2.2900
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QFCTXSquare NutSteelPlain3/8-163/8-16 square nut plain b18.2.2186
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QFCTXSquare NutSteelPlain3/8-163/8-16 square nut plain b18.2.2704
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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 NutSteelPlain3/4-103/4-10 square nut plain tap oversized b18.2.2203
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QFCTXSquare NutSteelPlain3/4-103/4-10 square nut plain tap oversized b18.2.2601
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QFCTXSquare NutSteelPlain3/4-103/4-10 square nut plain tap oversized b18.2.21410
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QFCTXSquare NutSteelPlain1-81-8 square nut plain b18.2.225
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QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-2410-24 square nut 304 18-8 304 steel b18.2.2216
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QFCTXSquare NutSteelZinc/Clear5/16-185/16-18 square nut zinc b18.2.25430
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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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B & K FASTPASquare NutAluminumPlain1/4-201/4-20 aluminum square nuts b18.2.2500
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B & K FASTPASquare NutSteelGalvanized1/4-201/4-20 galv square nuts b18.2.229075
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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 NutGrade 8Zinc/Yellow3/4-103/4-10 heavy square nut gr 8 zy b18.2.226
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B & K FASTPASquare NutSteelPlain1-81-8 heavy square nuts plain b18.2.23
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B & K FASTPASquare NutSteelPlain1 1/8-71 1/8-7 heavy square nuts plain b18.2.21
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B & K FASTPASquare NutSteelPlain1 1/41 1/4 heavy square nuts plain b18.2.254
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B & K FASTPASquare NutSteelPlain2-4 1/22-4 1/2 heavy square nuts plain b18.2.29
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B & K FASTPASquare NutSteelPlain3/4-103/4-10 l.h. square nuts plain b18.2.2298
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B & K FASTPASquare NutSteelPlain#5-405/40 square nuts plain b18.2.23800
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B & K FASTPASquare NutSteelZinc/Clear#6-326/32 square nuts zinc b18.2.27177
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B & K FASTPASquare NutSteelZinc/Clear#8-328/32 square nuts zinc b18.2.215200
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B & K FASTPASquare NutSteelZinc/Clear#10-2410/24 square nuts zinc b18.2.219800
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B & K FASTPASquare NutSteelZinc/Clear#12-2412/24 square nuts zinc b18.2.25914
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B & K FASTPASquare NutSteelPlain1/4-201/4-20 square nuts plain b18.2.21200
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B & K FASTPASquare NutSteel Plain5/16-185/16-18 square nuts plain b18.2.246832
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B & K FASTPASquare NutSteelZinc/Clear5/16-185/16-18 square nuts zinc b18.2.26105
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B & K FASTPASquare NutSteelPlain3/8-163/8-16 square nuts plain b18.2.2304
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B & K FASTPASquare NutSteelPlain7/16-147/16-14 square nuts plain b18.2.226296
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B & K FASTPASquare NutSteelPlain1/2-131/2-13 square nuts plain b18.2.21583
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BHAMGASquare NutSteelPlain1 3/81 3/8 4140 square nuts b18.2.216
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BHAMGASquare NutGrade 2Plain1 x a1831 a183 grade 2 square nuts b18.2.270
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BHAMGASquare NutSteelPlain3/43/4 4140 square nuts b18.2.291
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BHAMGASquare NutGrade 2HPlain1 3/81 3/8 a194-2h square nuts b18.2.233
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IRFNJSquare NutGrade 2Plain1 1/4-71-1/4-7 square nut grade 2 b18.2.2 sae j995 steel plain180
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QFCTXSquare NutSteelZinc/Clear#10-3210-32 square nut zinc b18.2.25000
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QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-201/4-20 square nut single chamfer 304 s/s b18.2.2198
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QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-163/8-16 square nut 18-8 ss b18.2.280
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QFCTXSquare NutGrade AGalvanized5/8-115/8-11 square nut a563 gr. a galvanized b18.2.2190
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QFCTXSquare NutSteelZinc/Clear#6-326-32 square nut zinc b18.2.2907
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QFCTXSquare NutSteelGalvanized3/4-103/4-10 square concave nut hdg b18.2.2148
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QFCTXSquare NutSteelGalvanized3/4-103/4-10 heavy square nut hdg b18.2.2300
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QFCTXSquare NutSteelPlain3/4-103/4-10 square nut b18.2.2800
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QFCTXSquare NutSteelPlain3/4-103/4-10 heavy square nut plain finish b18.2.2111
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QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16nc square nut st/st b18.2.260
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QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-2410/24 square nut 18-8ss b18.2.2510
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QFCTXSquare NutSteelZinc/Clear5/165/16nc bzp square nut b18.2.2150
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QFCTXSquare NutSteelZinc/Clear#10-3210/32 square nut zinc plated b18.2.23000
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WurthOntSquare NutGrade 2Zinc/Clear5/16-18nut sq gr2 (zn) 5/16-18 b18.2.2151
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THRDFASTFLSquare NutSteelPlain1/4-20square nut b18.2.26,425
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THRDFASTFLSquare NutSteelZinc/Clear1/4-20square nut b18.2.22,233
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THRDFASTFLSquare NutSteelPlain3/8-16square nut b18.2.21,460
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THRDFASTFLSquare NutSteelZinc/Clear5/16-18square nut b18.2.21,286
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THRDFASTFLSquare NutSteelGalvanized1-8square nut hdg b18.2.2233
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THRDFASTFLSquare NutSteelZinc/Clear3/8-16square nut b18.2.249
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THRDFASTFLSquare NutSteelZinc/Clear1/2-13square nut b18.2.239
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THRDFASTFLSquare NutSteelPlain1 1/4-7square nut b18.2.220
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THRDFASTFLSquare NutSteelGalvanized1 1/4-7square nut hdg b18.2.212
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THRDFASTFLSquare NutSteelGalvanized5/16-18square nut hdg b18.2.2416
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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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THRDFASTFLSquare NutSteelZinc/Clear7/8-9square nut b18.2.243
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THRDFASTFLSquare NutSteelZinc/Clear1/4-20square nut b18.2.220
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THRDFASTFLSquare NutSteelGalvanized1-8square nut hdg b18.2.27
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THRDFASTFLSquare NutSteelGalvanized1/4-20square nut hdg b18.2.23
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THRDFASTOKSquare NutSteelPlain5/8-11square nut b18.2.2173
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THRDFASTTNSquare NutSteelZinc/Clear1/2-13square nut b18.2.2964
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THRDFASTTNSquare NutSteelZinc/Clear3/4-10square nut b18.2.287
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THRDFASTTNSquare NutSteelPlain3/4-10square nut b18.2.256
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KBSTNSquare NutGrade 5Plain1-81-8 heavy square nut gr 5 b18.2.2182
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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.)Plain5/8-115/8-11 regular squarenut s/s b18.2.250
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KBSTNSquare NutSteelPlain9/16-189/16-18 sq track nut b18.2.2100
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KBSTNSquare NutSteelPlain3/4-163/4-16 sq track nut b18.2.2198
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KBSTNSquare NutSteelPlain1 3/4-51-3/4-5 heavy square nut b18.2.252
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KBSTNSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-163/8-16 regular squarenut s/s b18.2.21,735
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KBSTNSquare NutSteelPlain2 1/4-4 1/22 1/4-4.5 heavy square nut b18.2.224
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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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WSBKYSquare NutGrade 2Plain1-8nut sq gr2 (pl) 1-8 b18.2.21,750
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All SizeTXSquare NutSteelPlain1/4-201/4-20 square nut b18.2.24,503
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All SizeTXSquare NutSteelPlain3/4-103/4-10 square nut plain b18.2.2227
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All SizeTXSquare NutSteelPlain#8-328-32 square nut b18.2.210,800
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All SizeTXSquare NutSteelGalvanized5/8-115/8-11 square nut galv b18.2.2498
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All SizeTXSquare NutSteelPlain7/8-97/8-9 square nut b18.2.273
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All SizeTXSquare NutSteelZinc/Clear3/8-163/8-16 square nut zinc b18.2.250
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