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3 1/2 inch length Hex Bolts

Hex Machine Bolts are threaded bolts with a hexagonal head on one end, with no washer face on the bearing surface and a threaded shaft on the other end. Hex bolts are tightened with a wrench and are used to connect metal parts. The body tolerances of hex machine bolts are not as close as those of hex cap screws. Hex machine bolts are covered under ASME Standard B18.2.1

22,053 Hex Machine Bolt, showing 200, (click on any line for more information)

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain7/16-14 x 3 1/27/16-14x3-1/2 18-8 ss fin hex bolt2
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 1/25/16-18x3-1/2 18-8 ss fin hex bolt237
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3 1/21/2-13x3-1/2 18-8 ss fin hex bolt43
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 3 1/23/8-16x3-1/2 18-8 ss fin hex bolt86
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain7/8-9 x 3 1/27/8-9x3-1/2 18-8 ss fin hex bolt62
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SunPackFLHex Machine BoltGrade APlain3/4-10 x 3 1/23/4-10x3-1/2 a307a fin hex bolt plain1,256
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SunPackFLHex Machine BoltGrade ACadmium3/4-10 x 3 1/23/4-10x3-1/2 a307a fin hex bolt cad720
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SunPackFLHex Machine BoltGrade APlain1-8 x 3 1/21-8x3-1/2 a307a fin hex bolt plain60
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SunPackFLHex Machine BoltGrade APlain7/8-9 x 3 1/27/8-9x3-1/2 a307a fin hex bolt plain1,061
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 3 1/23/4-10x3-1/2 18-8 ss fin hex bolt846
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1 1/8-7 x 3 1/21-1/8-7x3-1/2 18-8 ss fin hex bolt19
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SunPackFLHex Machine BoltGrade AZinc/Clear1/2-13 x 3 1/21/2-13x3-1/2 a307a fin hex bolt zinc3
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SunPackFLHex Machine BoltGrade AGalvanized7/8-9 x 3 1/27/8-9x3-1/2 a307a fin hex bolt hdg80
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 1/25/8-11x3-1/2 18-8 ss fin hex bolt domestic13
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SunPackFLHex Machine BoltGrade AZinc/Clear5/8-11 x 3 1/25/8-11x3-1/2 a307a fin hex bolt zinc817
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SunPackFLHex Machine BoltGrade AGalvanized5/8-11 x 3 1/25/8-11x3-1/2 a307a fin hex bolt hdg55
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SunPackFLHex Machine BoltGrade AGalvanized1/2-13 x 3 1/21/2-13x3-1/2 a307a fin hex bolt hdg15
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SunPackFLHex Machine BoltGrade APlain1 1/4-7 x 3 1/21-1/4-7x3-1/2 a307a fin hex bolt plain16
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SunPackFLHex Machine BoltGrade AGalvanized3/4-10 x 3 1/23/4-10x3-1/2 a307a fin hex bolt hdg112
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 1/25/8-11x3-1/2 18-8 ss fin hex bolt62
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Set ScrewILHex Machine Bolt316, 317, A4 StainlessPlain3/8-16 x 3 1/2316 stainless hex boltinquire
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Set ScrewILHex Machine Bolt316, 317, A4 StainlessPlain1/2-13 x 3 1/2316 stainless hex boltinquire
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MESAFASTCAHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3 1/2h/b 18-8 s/s150.0
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MESAFASTCAHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 1/2h/b 18-8 s/s33.0
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MESAFASTCAHex Machine BoltGrade 5Zinc/Clear7/16-20 x 3 1/2h/b gr523.0
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YANKEENHHex Machine BoltGrade AGalvanized1-8 x 3 1/21-8 x 3-1/2 hex bolt a307 grade a steel hot-dipped galvanized8
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R&S IndusORHex Machine BoltGrade APlain1-8 x 3 1/21-8x3 1/2 (pt) hex bolts a307 grade a coarse low carbon plain29
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R&S IndusORHex Machine BoltGrade AGalvanized1 1/4-7 x 3 1/21 1/4-7x3 1/2 hex bolts a307 grade a coarse hdg20
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R&S IndusORHex Machine BoltGrade AZinc/Clear1 1/8-7 x 3 1/21 1/8-7x3 1/2 hex bolts a307 grade a coarse zinc cr+3 494804/305
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R&S IndusORHex Machine BoltGrade APlain1 1/4-7 x 3 1/21 1/4-7x3 1/2 hex bolts a307 grade a coarse low carbon plain42
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R&S IndusORHex Machine BoltGrade APlain1 1/8-7 x 3 1/21 1/8-7x3 1/2 hex bolts a307 grade a coarse low carbon plain38
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R&S IndusORHex Machine BoltGrade AZinc/Clear1/4-20 x 3 1/21/4-20x3 1/2 (pt) hex bolts a307 grade a coarse zinc cr+3 494015/50532
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R&S IndusORHex Machine BoltGrade APlain1/4-20 x 3 1/21/4-20x3 1/2 (pt) hex bolts a307 grade a coarse low carbon plain464
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R&S IndusORHex Machine BoltGrade AGalvanized5/8-11 x 3 1/25/8-11x3 1/2 (pt) hex bolts a307 grade a coarse hdg 495090/15028
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R&S IndusORHex Machine BoltGrade APlain3/4-10 x 3 1/23/4-10x3 1/2 (pt) hex bolts a307 grade a coarse low carbon plain 493193/100508
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R&S IndusORHex Machine BoltGrade APlain5/8-11 x 3 1/25/8-11x3 1/2 (pt) hex bolts a307 grade a coarse low carbon plain 493147/150153
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R&S IndusORHex Machine BoltGrade APlain7/8-9 x 3 1/27/8-9x3 1/2 (pt) hex bolts a307 grade a coarse low carbon plain 493239/7012
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R&S IndusORHex Machine BoltGrade AGalvanized7/8-9 x 3 1/27/8-9x3 1/2 (pt) hex bolts a307 grade a coarse hdg21
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R&S IndusORHex Machine BoltGrade AZinc/Clear7/8-9 x 3 1/27/8-9x3 1/2 (pt) hex bolts a307 grade a coarse zinc cr+359
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MTPCAHex Machine BoltGrade 8Zinc/Yellow9/16-18 x 3 1/29/16-18 x 3 1/2 gr.8 y/zn hex hd bolts2,200
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MTPCAHex Machine BoltGrade 8Zinc/Yellow5/16-24 x 3 1/25/16-24 x 3 1/2 gr.8 y/zn hex hd bolts30
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3 1/21/4-20x3-1/2 18-8 ss fin hex bolt29
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SunPackFLHex Machine BoltGrade APlain5/8-11 x 3 1/25/8-11x3-1/2 a307a fin hex bolt plain54
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SunPackFLHex Machine BoltGrade AZinc/Clear1 1/8-7 x 3 1/21-1/8-7x3-1/2 a307a fin hex bolt zinc950
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SunPackFLHex Machine BoltBrassPlain5/8-11 x 3 1/25/8-11x3-1/2 brass fin hex bolt24
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SunPackFLHex Machine BoltGrade 5Zinc/Clear7/16-14 x 3 1/27/16-14x3-1/2 gr5 fin hex bolt zinc308
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Jay-CeeMIHex Machine BoltSteelGalvanized5/16-18 x 3 1/25/16-18x3 1/2 hex machine bolt galvanized hot dip galvanized182
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EndriesWIHex Machine BoltGrade 5Zinc/Clear7/16-14 x 3 1/27/16-14x3-1/2 grade 5 carriage bolt hex chromium free 96 hr salt spray zinc250
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AmericanNYHex Machine BoltGrade 5Plain5/16-18 x 3 1/2h/b30
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 3 1/23/4-10x3-1/2 18-8 ss fin hex bolt swiss69
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RCFastAZHex Machine BoltGrade AZinc/Clear1/4-20 x 3 1/2h/b a307 gra cr+3 (pt)450
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Big RedOKHex Machine BoltGrade B7Zinc/Clear1/4-20 x 3 1/21/4-20 x 3-1/2 a193 b7 finished hex bolts zinc plated9
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Big RedOKHex Machine BoltGrade B8Plain3/8-16 x 3 1/23/8-16 x 3-1/2 a193 b8 finished hex bolts39
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 3 1/23/4-10x3-1/2 18-8 ss fin hex bolt domestic20
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SunPackFLHex Machine Bolt316, 317, A4 StainlessPlain1 1/2-6 x 3 1/21-1/2-6x3-1/2 316 ss fin hex bolt5
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AbabaCAHex Machine BoltSteelGalvanized1-8 x 3 1/21-8 x 3 1/2 hex bolt stl hdg b18.2.116
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AbabaCAHex Machine BoltSteelZinc/Clear1-8 x 3 1/21-8 x 3 1/2 hex bolt stl znc b18.2.115
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AbabaCAHex Machine BoltSteelZinc/Clear1/4-20 x 3 1/21/4-20 x 3 1/2 hex bolt stl znc b18.2.1821
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AbabaCAHex Machine BoltSteelZinc/Clear5/16-18 x 3 1/25/16-18 x 3 1/2 hex bolt stl znc b18.2.1196
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AbabaCAHex Machine BoltSteelGalvanized3/8-16 x 3 1/23/8-16 x 3 1/2 hex bolt stl hdg b18.2.1200
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AbabaCAHex Machine BoltSteelZinc/Clear3/8-16 x 3 1/23/8-16 x 3 1/2 hex bolt stl znc b18.2.1119
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AbabaCAHex Machine BoltSteelGalvanized1/2-13 x 3 1/21/2-13 x 3 1/2 hex bolt stl hdg b18.2.1160
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AbabaCAHex Machine BoltSteelZinc/Clear1/2-13 x 3 1/21/2-13 x 3 1/2 hex bolt stl znc b18.2.1199
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AbabaCAHex Machine BoltSteelGalvanized5/8-11 x 3 1/25/8-11 x 3 1/2 hex bolt stl hdg b18.2.164
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AbabaCAHex Machine BoltSteelZinc/Clear5/8-11 x 3 1/25/8-11 x 3 1/2 hex bolt stl znc b18.2.1151
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AbabaCAHex Machine BoltSteelGalvanized3/4-10 x 3 1/23/4-10 x 3 1/2 hex bolt stl hdg b18.2.164
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AbabaCAHex Machine BoltSteelZinc/Clear3/4-10 x 3 1/23/4-10 x 3 1/2 hex bolt stl znc b18.2.1320
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AbabaCAHex Machine BoltSteelPlain7/8-9 x 3 1/27/8-9 x 3 1/2 hex bolt stl pln b18.2.16
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AbabaCAHex Machine BoltSteelZinc/Clear7/8-9 x 3 1/27/8-9 x 3 1/2 hex bolt stl znc b18.2.1145
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ASMCILHex Machine BoltGrade APlain5/16-18 x 3 1/25/16-18x3 1/2 (pt) coarse a307 gra hex bolt low carb pln unc125
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AbabaCAHex Machine BoltSteelZinc/Clear1 1/8-7 x 3 1/21 1/8-7 x 3 1/2 hex bolt stl znc b18.2.130
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AbabaCAHex Machine BoltSteelZinc/Clear1/4-20 x 3 1/21/4-20 x 3 1/2 hex bolt stl znc b18.2.1200
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AbabaCAHex Machine BoltSteelZinc/Clear5/16-18 x 3 1/25/16-18 x 3 1/2 hex bolt stl znc b18.2.1200
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AbabaCAHex Machine BoltSteelGalvanized3/8-16 x 3 1/23/8-16 x 3 1/2 hex bolt stl hdg b18.2.150
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AbabaCAHex Machine BoltSteelZinc/Clear3/8-16 x 3 1/23/8-16 x 3 1/2 hex bolt stl znc b18.2.1300
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AbabaCAHex Machine BoltSteelGalvanized1/2-13 x 3 1/21/2-13 x 3 1/2 hex bolt stl hdg b18.2.150
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AbabaCAHex Machine BoltSteelZinc/Clear1/2-13 x 3 1/21/2-13 x 3 1/2 hex bolt stl znc b18.2.150
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AbabaCAHex Machine BoltSteelZinc/Clear5/8-11 x 3 1/25/8-11 x 3 1/2 hex bolt stl znc b18.2.150
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ACCURATEILHex Machine BoltGrade AZinc/Clear5/8-11x3 1/2 hex cap scr a307 zinc80
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LibertyILHex Machine Bolt316, 317, A4 StainlessPlain3/8-16 x 3 1/23/8-16x3-1/2 h/b 316l stainless with certs 1 thread domestic material melt & mfg. domestic material melt & mfg.675
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Alma BoltMIHex Machine BoltGrade 2Zinc/Clear1/4-20 x 3 1/21/4-20 x 3 1/2 hex hd blt gr2 zp b18.2.14025
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SunPackFLHex Machine BoltGrade APlain1/2-13 x 3 1/21/2-13x3-1/2 a307a fin hex bolt plain48
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MESAFASTCAHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 1/2h/b 18-8 s/s1.0
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ExpressCAHex Machine BoltSteelZinc/Clear3/8-16 x 3 1/23/8-16x3-1/2 hex bolt zinc48
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ExpressCAHex Machine BoltSteelZinc/Clear1/2-13 x 3 1/21/2-13x3-1/2 hex bolt zinc130
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ExpressCAHex Machine BoltSteelZinc/Clear5/8-11 x 3 1/25/8-11x3-1/2 hex bolt zinc78
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ExpressCAHex Machine BoltGrade 5Zinc/Clear5/16-18 x 3 1/25/16-18x3-1/2 hex bolt grade 5 zinc155
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ExpressCAHex Machine BoltGrade 5Zinc/Clear3/8-16 x 3 1/23/8-16x3-1/2 hex bolt grade 5 zinc1846
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ExpressCAHex Machine BoltSteelZinc/Clear1/4-20 x 3 1/21/4-20x3-1/2 hex bolt zinc400
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ExpressCAHex Machine BoltGrade 5Zinc/Clear7/16-14 x 3 1/27/16-14x3-1/2 hex bolt grade 5 zinc4145
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ExpressCAHex Machine BoltGrade 5Zinc/Clear1/2-13 x 3 1/21/2-13x3-1/2 hex bolt grade 5 zinc2835
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ExpressCAHex Machine BoltGrade 8Zinc/Yellow1/2-13 x 3 1/21/2-13x3-1/2 hex bolt grade 8 yellow zinc3
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ExpressCAHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3 1/21/4-20x3-1/2 hex bolt 18-8 304 steel35
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SunPackFLHex Machine BoltGrade ACadmium1 1/8-7 x 3 1/21-1/8-7x3-1/2 a307a fin hex bolt cad1
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SunPackFLHex Machine BoltGrade 5Zinc/Clear7/8-9 x 3 1/27/8-9x3-1/2 gr5 fin hex bolt zinc canadian6
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SunPackFLHex Machine BoltGrade 5Zinc/Clear5/8-11 x 3 1/25/8-11x3-1/2 gr5 fin hex bolt zinc canadian14
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SunPackFLHex Machine BoltGrade 5Zinc/Clear3/4-10 x 3 1/23/4-10x3-1/2 gr5 fin hex bolt zinc canadian101
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ExpressCAHex Machine BoltSteelZinc/Clear3/8-16 x 3 1/23/8-16x3-1/2 hex bolt zinc1298
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ExpressCAHex Machine BoltSteelZinc/Clear7/8-9 x 3 1/27/8-9x3-1/2 hex bolt zinc10
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ExpressCAHex Machine BoltGrade 5Zinc/Clear5/16-18 x 3 1/25/16-18x3-1/2 hex bolt grade 5 zinc155
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ExpressCAHex Machine BoltGrade 5Zinc/Clear3/8-16 x 3 1/23/8-16x3-1/2 hex bolt grade 5 zinc1846
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ExpressCAHex Machine BoltGrade 5Zinc/Clear7/16-14 x 3 1/27/16-14x3-1/2 hex bolt grade 5 zinc4145
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ExpressCAHex Machine BoltGrade 5Zinc/Clear1/2-13 x 3 1/21/2-13x3-1/2 hex bolt grade 5 zinc2835
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ExpressCAHex Machine BoltGrade 5Zinc/Clear3/4-10 x 3 1/23/4-10x3-1/2 hex bolt grade 5 zinc12
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ExpressCAHex Machine BoltGrade 5Zinc/Clear3/4-10 x 3 1/23/4-10x3-1/2 hex bolt grade 5 zinc20
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ExpressCAHex Machine BoltGrade 8Zinc/Yellow5/8-11 x 3 1/25/8-11x3-1/2 hex bolt grade 8 yellow zinc15
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ExpressCAHex Machine BoltGrade 8Zinc/Yellow1-8 x 3 1/21-8x3-1/2 hex bolt grade 8 yellow zinc4
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ExpressCAHex Machine BoltSteelGalvanized1/2-13 x 3 1/21/2-13x3-1/2 galv hex bolt7
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ExpressCAHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 1/25/16-18x3-1/2 hex bolt 18-8 304 steel100
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ExpressCAHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 3 1/23/8-16x3-1/2 hex bolt 18-8 304 steel22
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ExpressCAHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 1/25/8-11x3-1/2 hex bolt 18-8 304 steel17
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SIIINHex Machine BoltGrade AZinc/Clear3/8-16 x 3 1/23/8-16 x 3-1/2 astm a307 grade a zinc finish hex bolt b18.2.125
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MTPCAHex Machine BoltGrade 8Zinc/Yellow7/16-14 x 3 1/27/16-14 x 3 1/2 gr.8 y/zn hex hd bolts125
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MTPCAHex Machine BoltGrade 5Zinc/Clear1/2-20 x 3 1/21/2-20x3 1/2 gr.5 zn hex hd bolt50
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SunPackFLHex Machine BoltGrade APlain3/8-16 x 3 1/23/8-16x3-1/2 a307a fin hex bolt 1105/1280 sermagard1
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HBBOLTCAHex Machine BoltSteelGalvanized1 1/8-7 x 3 1/2h/b h.d.g.16
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HBBOLTCAHex Machine BoltGrade 5Zinc/Clear9/16-12 x 3 1/2nc h/b z/p75
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HBBOLTCAHex Machine BoltGrade 8Zinc/Yellow9/16-18 x 3 1/2h/b6
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SunPackFLHex Machine BoltGrade 8Plain5/8-11 x 3 1/25/8-11x3-1/2 j429 gr8 fin hex bolt plain60
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SunPackFLHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain7/16-14 x 3 1/2304 ss fin h/b2
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SunPackFLHex Machine Bolt316, 317, A4 StainlessPlain1/2-13 x 3 1/2316 ss fin h/b5
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SunPackFLHex Machine BoltGrade 5Zinc/Clear5/8-11 x 3 1/2gr5 fin h/b domestic16
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SunPackFLHex Machine Bolt316, 317, A4 StainlessPlain3/4-10 x 3 1/23/4-10 x 3-1/2 316 ss fin hex bolt domestic4
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SunPackFLHex Machine BoltGrade 5Fluoropolymer-Based (Xylan, Fluorokote, Teflon)3/4-10 x 3 1/23/4-10 x 3-1/2 gr5 fin hex bolt teflon blue50
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SunPackFLHex Machine BoltGrade 8Plain1/4-20 x 3 1/2j429 gr8 fin h/b sermagard 1105/12802
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SunPackFLHex Machine BoltGrade APlain3/8-16 x 3 1/2a307a fin h/b 1105/1280 sermagard1
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QFCTXHex Machine BoltASTM A449Galvanized1/2-13 x 3 1/21/2-13x3 hex head bolt a449 hdg 1 1/2 thd b18.2.123
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B & K FASTPAHex Machine BoltGrade B7Zinc/Clear1/2-13 x 3 1/21/2-13 x 3 1/2 a193 b7 hex bolts zinc b18.2.18
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Lubker DiPAHex Machine BoltGrade AGalvanized3/4-10 x 3 1/23/4-10x3 1/2 hex bolt a307 gr a hot dip galv36
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TSFTXHex Machine BoltGrade AGalvanized5/8-11 x 3 1/2hex bolt a307 galvanized 5/8-11 x 3-1/240
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ACFCAHex Machine BoltGrade AGalvanized5/8-11 x 3 1/25/8-11x3-1/2 a307 grade a hex bolt hot dip galvanized150
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JET FITTINGCAHex Machine BoltGrade 2Zinc/Clearx 3 1/2bolt hex 1-1/8 12x3-1/2 grade 2 steel zinc plated b18.2.128
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JET FITTINGCAHex Machine BoltSteelZinc/Clear5/16-18 x 3 1/2bolt hex 5/16-18x3-1/2 steel zinc plated b18.2.185
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JET FITTINGCAHex Machine BoltGrade 5Zinc/Clear5/16-18 x 3 1/2bolt hex 5/1618x3-1/2 grade 5 steel zinc plated b18.2.1350
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JET FITTINGCAHex Machine BoltGrade 8Zinc/Yellow5/16-18 x 3 1/2bolt hex 5/1618x3-1/2 grade 8 steel zinc plated yellow b18.2.1230
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JET FITTINGCAHex Machine BoltGrade 2Zinc/Clear1/2-13 x 3 1/21/2-13x3-1/2 hex bolt steel grade-2 zinc b18.2.150
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JET FITTINGCAHex Machine BoltGrade 8Zinc/Yellow1/2-13 x 3 1/2bolt hex 1/213x3-1/2 grade 8 steel zinc plated yellow b18.2.150
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JET FITTINGCAHex Machine BoltGrade AZinc/Clear1/4-20 x 3 1/2bolt hex 1/4-20x3-1/2 steel a307 zinc plated b18.2.125
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JET FITTINGCAHex Machine BoltGrade AZinc/Clear1/2-13 x 3 1/21/2-13x3 1/2 (pt) bolts hex bolts a307 grade a hex bolt zinc cr+3 (inch) b18.2.125
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JET FITTINGCAHex Machine BoltGrade AGalvanized1/4-20 x 3 1/21/4-20x3 1/2 (pt) bolts hex bolts a307 grade a hex bolt hdg (inch) b18.2.150
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CNBILHex Machine BoltGrade 5Galvanized9/16-12 x 3 1/2h/b mechanical dom.70
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MTPCAHex Machine BoltGrade 5Zinc/Clear7/16-14 x 3 1/27/16-14 x 3 1/2 gr.5 zn hex hd boltsstock
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MTPCAHex Machine BoltGrade 8Zinc/Yellow5/16-18 x 3 1/25/16-18 x 3 1/2 gr.8 y/zn hex hd boltsstock
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JET FITTINGCAHex Machine BoltGrade 2Zinc/Clear5/8-11 x 3 1/2bolt hex 5/8-11x3-1/2 grade 2 steel zinc plated b18.2.161
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JET FITTINGCAHex Machine BoltGrade 5Zinc/Yellow5/8-11 x 3 1/2bolt hex 5/8-11x3-1/2 grade 5 steel zinc plated yellow b18.2.150
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JET FITTINGCAHex Machine BoltGrade 2Zinc/Clear3/8-16 x 3 1/2bolt hex 3/816x3-1/2 grade 2 steel zinc plated b18.2.166
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HewesNYHex Machine BoltGrade B16Plain3/4-10 x 3 1/2fin hex hdblt stl gr-b16176
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Valley NuWAHex Machine BoltSteelPlain7/8-9 x 3 1/2nc h/b pl45
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Valley NuWAHex Machine BoltGrade AGalvanized3/4 x 3 1/2a307 h/b hdg usa15
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