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Square Head Bolt
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SupplierLocTypeMaterialFinishSizeDescriptionQty 
EndriesWIHex Head Cap ScrewGrade 5Zinc/Yellow1/2-13 x 1 1/41/2-13x1-1/4 grade 5 hex head cap screw yellow zinc513
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EndriesWIHex Head Cap Screw316, 317, A4 StainlessPlain1/2-13 x 51/2-13x5 316 stainless steel hex head cap screw451
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EndriesWISocket Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 2 1/21/2-13x2-1/2 18-8 stainless steel socket head cap screw280
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EndriesWIHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 131/2-13x13 grade 5 hex head cap screw zinc395
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EndriesWIHex Head Cap ScrewGrade 5Plain1/2-13 x 131/2-13x13 grade 5 hex head cap screw plain206
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EndriesWIFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 21/2-13x2 18-8 stainless steel flat socket head cap screw121
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EndriesWIHex Head Cap ScrewGrade 2Zinc/Clear1/2-13 x 3/41/2-13x3/4 grade 2 hex head cap screw zinc100
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EndriesWICarriage BoltGrade 5Zinc/Clear1/2-13 x 3 1/41/2-13x3-1/4 grade 5 carriage bolt zinc8523
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EndriesWICarriage BoltGrade 5Zinc/Clear1/2-13 x 4 1/21/2-13x4-1/2 grade 5 carriage bolt zinc260
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EndriesWIHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 7 1/21/2-13x7-1/2 grade 5 hex head cap screw zinc30
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EndriesWIFlat Head Socket Cap ScrewSteelZinc/Yellow1/2-13 x 1 3/41/2-13x1-3/4 flat socket head cap screw yellow zinc2650
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EndriesWIFlange Screw w/o serr. (Frame Bolt)Grade 5Zinc/Yellow1/2-13 x 1 1/41/2-13x1-1/4 grade 5 hex flange bolt yellow zinc50
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EndriesWIHex Tap Bolt (Fully Threaded)Grade 5Zinc/Clear1/2-13 x 1 1/21/2-13x1-1/2 grade 5 #3 flat head full thread plow bolt hex chromium free 96 hr salt spray zinc1500
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EndriesWIHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 1 1/21/2-13x1-1/2 grade 5 hex head cap screw trivalent clear zinc with certified material test report 10/pk2894
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EndriesWIHex Head Cap ScrewGrade 5Dip-Spin, Spray-Spin Basecoat + Topcoats (Dacromet, Doerken, Geomet, Magni, etc.)1/2-13 x 2 1/41/2-13x2-1/4 grade 5 hex head cap screw geomet 720+l silver 1 000 hours to red rust174
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EndriesWIShoulder Bolt (Stripper Bolt)SteelPlain1/2 x 3 3/4 (3/8-16)1/2x3-3/4 alloy socket shoulder screw 3/8-16 thread plain1100
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EndriesWIHex Head Cap ScrewGrade 5Zinc/Yellow1/2-20 x 2 3/41/2-20x2-3/4 grade 5 hex head cap screw tri ylw 96hr wh f1941 .0002200
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EndriesWISocket Head Cap ScrewASTM A574Plain1/2-13 x 91/2-13 x 9 socket hd cap screw dom aly10
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EndriesWIFlange Screw w/o serr. (Frame Bolt)Grade 8Zinc/Yellow1/2-13 x 4 1/21/2-13x4-1/2 grade 8 hex flange bolt yellow zinc30
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EndriesWISocket Head Cap ScrewSteelPlain1/2-13 x 11/2-13x1 socket head cap screw plain american sockets82
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SWACOOHFlat Head Socket Cap ScrewSteelBlack Oxide1/2-20 x 11/2-20x1 flat soc cap screw alloy steel black (usa)1000
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SWACOOHHex Flange Screw w/ serr. (Whiz-Lock eq.)Grade 5Plain1/2-13 x 11/2-13x1 grade 5 hex hd serrated flange94
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SWACOOHSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 1 1/41/2-13x1 1/4 shcs stl blk176
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SWACOOHSocket Head Cap ScrewASTM A574Black Oxide1/2-13 x 1 3/81/2-13x1-3/8 shcs alloy bo8
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SWACOOHSocket Head Cap ScrewASTM A574Black Oxide1/2-13 x 3 3/41/2-13x3-3/4 shcs alloy bo22
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SWACOOHSocket Head Cap ScrewASTM A574Zinc/Clear1/2-13 x 11/2-13x1 shcs alloy zi210
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SWACOOHSocket Head Cap ScrewASTM A574Plain1/2-13 x 1 1/21/2-13x1-1/2 shcs f/t alloy stl50
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SWACOOHShoulder Bolt (Stripper Bolt)SteelPlain1/2 x 1 1/2 (3/8-16)1/2x1-1/2 (3/8-16) soc shoulder screw alloy steel pln (usa)100
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SWACOOHSocket Head Cap ScrewASTM A574Black Oxide1/2-13 x 2 1/41/2-13x2-1/4 shcs p/t alloy bo43
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Cal FastenrsCACarriage BoltGrade 5Zinc/Clear1/2-13 x 3 3/41/2-13 x 3 3/4 c/b Cr3+ gr. 5 c/b90
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Cal FastenrsCAHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 2 3/4hex c/s , cr3100
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EndriesWIHex Head Cap ScrewGrade 5Plain1/2-20 x 11/2-20x1 grade 5 hex head cap screw plain200
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EndriesWIHex Head Cap ScrewGrade 8Zinc/Black1/2-13 x 51/2-13x5 grade 8 hex head cap screw hexavalent black zinc1337
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EndriesWICarriage BoltGrade 5Zinc/Yellow1/2-13 x 41/2-13x4 grade 5 carriage bolt yellow zinc324
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MESAFASTCAHex Head Cap ScrewGrade 8Zinc/Yellow1/2-13 x 3 3/41/2-13x3-3/4 hex cap screw gr8 steel yellow zinc5.0
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MESAFASTCAHex Tap Bolt (Fully Threaded)Grade 5Zinc/Clear1/2-13 x 3 1/21/2-13x3-1/2 hex tap bolt gr5 steel zinc10.0
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MESAFASTCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 4 1/2hex c/s7.0
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EndriesWISocket Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 41/2-13x4 18-8 stainless steel socket head cap screw800
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EndriesWICarriage BoltGrade 5Zinc/Clear1/2-13 x 31/2-13x3 grade 5 carriage bolt zinc90
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EndriesWIHex Head Cap ScrewGrade 5Zinc/Clear1/2-20 x 4 3/41/2-20x4-3/4 grade 5 left hand hex head cap screw tri clr zinc 120 wh/144 red rust8
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EndriesWIHex Head Cap ScrewGrade 8Zinc/Yellow1/2-13 x 3 3/41/2-13x3-3/4 grade 8 hex head cap screw yellow zinc413
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EndriesWICarriage BoltGrade AZinc/Clear1/2-13 x 8 1/21/2-13x8-1/2 a307 grade a carriage bolt trivalent clear zinc690
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EndriesWIHex Head Cap ScrewGrade 2Plain1/2-13 x 3/41/2-13x3/4 grade 2 hex head cap screw plain395
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EndriesWIHex Head Cap ScrewGrade 8Zinc/Clear1/2-13 x 2 3/41/2-13x2-3/4 grade 8 hex head cap screw zinc32
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EndriesWIHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 61/2-13x6 grade 5 hex head cap screw zinc100
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EndriesWIHex Machine BoltGrade AGalvanized1/2-13 x 31/2-13x3 a307 grade a hex head cap screw hot dip galvanized675
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EndriesWICarriage BoltSteelZinc/Clear1/2-13 x 71/2-13x7 carriage bolt trivalent clear zinc600
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EndriesWIButton Head Socket Cap ScrewSteelPlain1/2-13 x 21/2-13x2 button socket head cap screw plain100
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EndriesWIHex Head Cap ScrewGrade 8Phosphate1/2-13 x 31/2-13x3 grade 8 hex head cap screw black phosphate200
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EndriesWIShoulder Bolt (Stripper Bolt)SteelPlain1/2 x 3 3/4 (3/8-16)1/2x3-3/4 socket shoulder screw 3/8-16 thread dorrel tech source controlled476
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EndriesWISocket Head Cap ScrewSteelZinc/Clear1/2-13 x 21/2-13x2 socket head cap screw zinc195
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EndriesWIHex Head Cap ScrewGrade 5Zinc/Yellow1/2-13 x 5 1/21/2-13x5-1/2 grade 5 hex head cap screw tri ylw 96hr wh f1941 .00029582
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EndriesWIHex Tap Bolt (Fully Threaded)Grade 8Zinc/Yellow1/2-20 x 2 1/21/2-20x2-1/2 grade 8 hex head tap bolt yellow zinc27
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EndriesWICarriage BoltGrade 5Zinc/Clear1/2-13 x 1 3/41/2-13x1-3/4 grade 5 carriage bolt zinc3250
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EndriesWIHex Head Cap ScrewGrade 5Zinc/Clear1/2-20 x 3 1/21/2-20x3-1/2 grade 5 hex head cap screw zinc125
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EndriesWIHex Head Cap ScrewGrade 5Zinc/Clear1/2-20 x 31/2-20x3 grade 5 hex head cap screw zinc200
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EndriesWISocket Head Cap ScrewSteelZinc/Yellow1/2-13 x 11/2-13x1 socket head cap screw yellow zinc993
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Lubker DiPAHeavy Hex Structural Bolt (A325, A490, 10.9)ASTM A449Plain1/2-13 x 21/2-13 x 2 heavy hex bolt a325-1 plain (mtr's available)1300
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MidStatesMICarriage BoltSteelPlain1/2-13 x 2 1/2c/b378
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MidStatesMISocket Head Cap ScrewSteelPlain1/2-20 x 5/8low hd soc c/s124
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MidStatesMIHex Head Cap ScrewGrade 5Plain1/2-20 x 3 3/4hex c/s105
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MidStatesMISocket Head Cap ScrewSteelZinc/Clear1/2-13 x 2soc c/s36
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MidStatesMIHex Head Cap ScrewSilicon BronzePlain1/2-13 x 5in hex c/s sil brz42
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MidStatesMIHex Head Cap ScrewSilicon BronzePlain1/2-13 x 3 1/4hex c/s sil brz20
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MidStatesMIHex Machine BoltGrade 2Galvanized1/2-13 x 3 1/4hex hd bolt hdg17
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MidStatesMIT-Head Bolt (T-Slot Bolt, Hammer Head Bolt)SteelPlain1/2-13 x 3 1/2t-slotted bolt12
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MidStatesMIGrade 8Plain1/2-13 x 7 1/2square hd bolt8
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FTSOHHex Head Cap ScrewGrade 8Zinc/Yellow1/2-13 x 4hx c/s gr 8 zy11814
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 1 1/21/2-13x1 1/2 coarse thread socket head cap screw black dfar unc2.500
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 5/81/2-13x5/8 coarse thread socket head cap screw black dfar unc2.500
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 1 1/41/2-13x1 1/4 coarse thread socket head cap screw black dfar unc2.500
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 7/81/2-13x7/8 coarse thread socket head cap screw black dfar unc2.500
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 71/2-13x7 coarse thread socket head cap screw black dfar unc0.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 1/21/2-13x1/2 coarse thread socket head cap screw black dfar unc2.500
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 21/2-13x2 coarse thread socket head cap screw black dfar unc1.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 81/2-13x8 coarse thread socket head cap screw black dfar unc0.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 3/41/2-13x3/4 coarse thread socket head cap screw black dfar unc2.500
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 6 1/21/2-13x6 1/2 coarse thread socket head cap screw black dfar unc0.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 1 3/41/2-13x1 3/4 coarse thread socket head cap screw black dfar unc1.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 11/2-13x1 coarse thread socket head cap screw black dfar unc2.500
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 2 1/41/2-13x2 1/4 coarse thread socket head cap screw black dfar unc1.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 2 1/21/2-13x2 1/2 coarse thread socket head cap screw black dfar unc1.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 41/2-13x4 coarse thread socket head cap screw black dfar unc1.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 5 1/21/2-13x5 1/2 coarse thread socket head cap screw black dfar unc1.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 3 3/41/2-13x3 3/4 coarse thread socket head cap screw black dfar unc1.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 2 3/41/2-13x2 3/4 coarse thread socket head cap screw black dfar unc1.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 51/2-13x5 coarse thread socket head cap screw black dfar unc1.250
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Kanebridge ILSocket Head Cap ScrewSteelBlack Oxide1/2-13 x 61/2-13x6 coarse thread socket head cap screw black dfar unc1.250
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General FMIHex Head Cap ScrewGrade 8Plain1/2-13 x 1 3/41/2-13 x 1.75 hhcs gr8 zidi bake b18.2.1180
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General FMIHex Head Cap ScrewGrade 8Plain1/2-13 x 31/2-13 x 3 hhcs gr8 zidi .0002 b18.2.1651
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General FMIHex Head Cap ScrewGrade 8Plain1/2-13 x 3 3/41/2-13 x 3.75 hhcs gr8 zidi bake b18.2.150
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General FMIHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 2 1/2hf 1/2-13 x 2.5 hhcs gr5 full thread zn b18.2.127350
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General FMICarriage BoltSteelPlain1/2-13 x 2 1/4hf 1/2-13 x2.25 short neck f/t carriage bolt b18.5194865
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General FMIHex Head Cap ScrewGrade 5Zinc/Yellow1/2-13 x 1 3/41/2-13 x 1.75 hhcs gr5 zn ylw triv b18.2.113550
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General FMIHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 2 1/21/2-13x 2.5 hhcs gr5 knurl zidi triv b18.2.192037
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General FMIHex Head Cap ScrewSteelZinc/Clear1/2-13 x 4 3/41/2-13 x 4.75 hhcs 8 zn clr 10 hr bk b18.2.15140
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General FMIHex Head Cap ScrewSteelZinc/Yellow1/2-13 x 41/2-13 x 4 hhcs 5 zn ylw b18.2.1796
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General FMIHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 31/2-13 x 3 hhcs gr5 knurl zidi triv b18.2.136745
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General FMIHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 41/2-13 x 4 hhcs full thread ss b18.2.11800
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General FMIHex Head Cap ScrewGrade 5Plain1/2-13 x 2 1/4hf 1/2-13 x 2.25 hhcs gr5 full thread b18.2.144405
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General FMIPlow Bolt, Scraper Blade BoltGrade 8Plain1/2-20 x 1 3/41/2-20 x 1.75 drive gear blt6150
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General FMIEye BoltSteelPlain1/2-13 x 31/2-13 x 3 full thread forged SLDR MCHERY EYE BLT27
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Lufasco, GAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 21/2-13x2 (pt) unc hex cap screws unc 18-8 304 a2 (18-8)580
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Lufasco, GAHex Head Cap ScrewAluminumPlain1/2-13 x 1 1/21/2-13x1 1/2 (ft) unc hex cap screws unc alum155
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Lufasco, GAHex Head Cap ScrewGrade 2Electrolytic Zinc Basecoat + Topcoats (Climacoat, Climaseal, etc.)1/2-13 x 1 1/21/2-13x1 1/2 (ft) unc hex cap screws unc grade 2 geo 720678
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Ace Bolt MSHex Tap Bolt (Fully Threaded)Grade 2Plain1/2-20 x 4 1/21/2-20 x 4-1/2 nf hex tap bolt {full th} gr 2 plain b18.2.11915
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Ace Bolt MSHex Machine BoltSilicon BronzePlain1/2-13 x 1 1/41/2-13 x 1-1/4 nc hex bolt sili bronze b18.2.1500
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Ace Bolt MSHex Machine Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3 3/41/2-13 x 3-3/4 nc hex bolt 18-8 ss b18.2.1416
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Ace Bolt MSShoulder Bolt (Stripper Bolt)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2 x 1 1/4 (3/8-16)1/2 x 1-1/4 stripper bolt 18-8 ss b18.3301
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Ace Bolt MSU-Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square bend u-bolt {3.13 b/l x 6-3/8 outside lgth x 2 thread} 18-8 ss400
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CONTAERONJHex Head Cap ScrewSteelPlain1/2-13 x 2 3/4hex c/s200
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CONTAERONJHex Head Cap ScrewSteelPlain1/2-20 x 2 3/4hex c/s200
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CONTAERONJFlange Screw w/o serr. (Frame Bolt)Grade GPlain1/2-20flange oval lock grg16131
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CONTAERONJHex Flange Screw w/ serr. (Whiz-Lock eq.)SteelPlain1/2-13hex serr flange w/oval2400
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CONTAERONJFlange Screw w/o serr. (Frame Bolt)Grade 8Zinc/Yellow1/2-13hex flange gr8 zn/yel1100
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CONTAERONJFlange Screw w/o serr. (Frame Bolt)Grade 8Zinc/Yellow1/2-20hex flange gr8 zn/yel2400
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