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3 3/4 inch length Hex Cap Screws (ASME B18. 2.1)

Hex Cap Screws are hex headed fasteners with external machine screw threads and differ from hex machine bolts by having a washer surface on the underside or bearing side of the head and a chamfered thread end. Hex cap screws have tighter dimensional tolerances than bolts. Metric hex cap screws are specified by various DIN, ISO and JIS standards, and US/Imperial hex cap screws are dimensionally specified by the ASME B18.2.1 specification.

Hex Head Cap Screw (b18.2.1), showing 200, (click on any line for more information)

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
BHAMALHex Head Cap ScrewGrade 2Plain3/4-10 x 3 3/43/4-10 x 3 3/4 hex c/s gr2 b18.2.110
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AbabaCAHex Head Cap ScrewGrade 9Zinc/Yellow1/4-20 x 3 3/41/4-20 x 3 3/4 h/c f911 yel znc b18.2.113
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3 3/41/4-20 x 3 3/4 h/c s/s b18.2.1650
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 3 3/45/16-18 x 3 3/4 h/c gr 5 znc b18.2.126
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow5/16-18 x 3 3/45/16-18 x 3 3/4 h/c dom gr 8 yel znc b18.2.150
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 3/45/16-18 x 3 3/4 h/c s/s b18.2.1100
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear5/16-24 x 3 3/45/16-24 x 3 3/4 h/c gr 5 znc b18.2.122
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear3/8-16 x 3 3/43/8-16 x 3 3/4 h/c gr 5 znc b18.2.175
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow3/8-16 x 3 3/43/8-16 x 3 3/4 h/c dom gr 8 yel znc b18.2.119
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 3 3/43/8-16 x 3 3/4 h/c s/s b18.2.15
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow7/16-14 x 3 3/47/16-14 x 3 3/4 h/c dom gr 8 yel znc b18.2.1182
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow7/16-20 x 3 3/47/16-20 x 3 3/4 h/c dom gr 8 yel znc b18.2.19
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow1/2-13 x 3 3/41/2-13 x 3 3/4 h/c dom gr 8 yel znc b18.2.178
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow9/16-12 x 3 3/49/16-12 x 3 3/4 h/c dom gr 8 yel znc b18.2.1103
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear5/8-11 x 3 3/45/8-11 x 3 3/4 h/c dom gr 5 znc b18.2.16
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AbabaCAHex Head Cap Screw316, 317, A4 StainlessPlain5/8-11 x 3 3/45/8-11 x 3 3/4 h/c 316 s/s b18.2.141
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow5/8-11 x 3 3/45/8-11 x 3 3/4 h/c dom gr 8 yel znc b18.2.1175
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 3/45/8-11 x 3 3/4 h/c s/s b18.2.144
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow5/8-18 x 3 3/45/8-18 x 3 3/4 h/c dom gr 8 yel znc b18.2.142
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear3/4-10 x 3 3/43/4-10 x 3 3/4 h/c gr 5 znc b18.2.120
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow3/4-10 x 3 3/43/4-10 x 3 3/4 h/c dom gr 8 yel znc b18.2.17
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GLFOHHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 3 3/43/4-10x3-3/4 hhcs 18-8 s/s b18.2.1 () () ()50
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 3 3/41/2-13x3-3/4 hhcs grade 5 stl zc b18.2.1 () () ()14
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GLFOHHex Head Cap ScrewGrade 8Zinc/Yellow1/2-13 x 3 3/41/2-13x3-3/4 hhcs grade 8 stl zy b18.2.1 () () ()451
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GLFOHHex Head Cap ScrewGrade 8Zinc/Yellow3/4-10 x 3 3/43/4-10x3-3/4 hhcs grade 8 stl zy b18.2.1 () () ()62
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear3/4-10 x 3 3/43/4-10x3-3/4 hhcs grade 5 stl zc b18.2.1 () () ()37
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GLFOHHex Head Cap ScrewGrade 5Plain3/4-10 x 3 3/43/4-10x3-3/4 hhcs grade 5 stl pln b18.2.1 () () ()51
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GLFOHHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 3 3/43/8-16x3-3/4 hhcs 18-8 s/s b18.2.1 () () ()169
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear3/8-16 x 3 3/43/8-16x3-3/4 hhcs grade 5 stl zc b18.2.1 () () ()767
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear5/8-11 x 3 3/45/8-11x3-3/4 hhcs grade 5 stl zc b18.2.1 () () ()166
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear7/16-14 x 3 3/47/16-14x3-3/4 hhcs grade 5 stl zc b18.2.1 () () ()164
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear7/8-9 x 3 3/47/8-9x3-3/4 hhcs grade 5 stl zc b18.2.1 () () ()5
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GLFOHHex Head Cap ScrewGrade 8Zinc/Yellow3/8-24 x 3 3/43/8-24x3-3/4 hhcs grade 8 stl zy b18.2.1 () () ()71
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GLFOHHex Head Cap ScrewGrade 5Plain5/8-11 x 3 3/45/8-11x3-3/4 hhcs grade 5 stl pln b18.2.1 () () ()128
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GLFOHHex Head Cap ScrewGrade 5Plain7/8-9 x 3 3/47/8-9x3-3/4 hhcs grade 5 stl pln b18.2.1 () () ()6
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GLFOHHex Head Cap ScrewGrade 5Plain1-8 x 3 3/41-8x3-3/4 hhcs grade 5 stl pln b18.2.1 () () ()28
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GLFOHHex Head Cap ScrewGrade 8Zinc/Yellow1/4-20 x 3 3/41/4-20x3-3/4 hhcs grade 8 stl zy b18.2.1 () () ()224
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GLFOHHex Head Cap ScrewGrade 8Zinc/Yellow3/8-16 x 3 3/43/8-16x3-3/4 hhcs grade 8 stl zy b18.2.1 () () ()124
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GLFOHHex Head Cap ScrewGrade 8Plain7/8-9 x 3 3/47/8-9x3-3/4 hhcs grade 8 stl pln b18.2.1 () () ()147
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GLFOHHex Head Cap ScrewGrade 8Plain1-8 x 3 3/41-8x3-3/4 hhcs grade 8 stl pln b18.2.1 () () ()42
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GLFOHHex Head Cap ScrewGrade 8Zinc/Yellow7/16-14 x 3 3/47/16-14x3-3/4 hhcs grade 8 stl zy b18.2.1 () () ()1380
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ASMCILHex Head Cap ScrewGrade 5Zinc/Clear1/4-20 x 3 3/41/4-20x3 3/4 (pt) coarse gr5 hex cap screw-usa med carb zp b18.2.122
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ASMCILHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 3 3/45/16-18x3 3/4 (pt) coarse gr5 hex cap screw-usa med carb zp b18.2.1200
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GLFOHHex Head Cap ScrewGrade 8Zinc/Yellow5/8-11 x 3 3/45/8-11x3-3/4 hhcs grade 8 stl zy b18.2.1 () ()2
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3 3/41/4-20 x 3 3/4 h/c s/s b18.2.175
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow5/16-18 x 3 3/45/16-18 x 3 3/4 h/c dom gr 8 yel znc b18.2.125
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow3/8-16 x 3 3/43/8-16 x 3 3/4 h/c dom gr 8 yel znc b18.2.175
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow7/16-14 x 3 3/47/16-14 x 3 3/4 h/c dom gr 8 yel znc b18.2.147
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow1/2-13 x 3 3/41/2-13 x 3 3/4 h/c dom gr 8 yel znc b18.2.130
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3 3/41/2-13 x 3 3/4 h/c s/s b18.2.120
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow1/2-20 x 3 3/41/2-20 x 3 3/4 h/c dom gr 8 yel znc b18.2.1140
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow1/2-20 x 3 3/41/2-20 x 3 3/4 h/c dom gr 8 yel znc b18.2.120
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow5/8-11 x 3 3/45/8-11 x 3 3/4 h/c dom gr 8 yel znc b18.2.120
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SIIINHex Head Cap ScrewGrade 2Zinc/Clear1/4-20 x 3 3/41/4-20 x 3-3/4 grade 2 hex cap screw zinc b18.2.1100
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StandardMAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 3/45/8-11x3-3/4 hex cap screw 18-8 stainless steel b18.2.1343
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StandardMAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 3 3/43/4-10x3-3/4 hex cap screw 18-8 stainless steel b18.2.1377
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StandardMAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 3/45/16-18x3-3/4 hex cap screw 18-8 stainless steel b18.2.11590
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StandardMAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3 3/41/2-13x3-3/4 hex cap screw 18-8 stainless steel b18.2.11620
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StandardMAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3 3/41/4-20x3-3/4 hex cap screw 18-8 stainless steel b18.2.14150
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StandardMAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-24 x 3 3/43/8-24x3-3/4 hex cap screw 18-8 stainless steel b18.2.121
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StandardMAHex Head Cap Screw316, 317, A4 StainlessPlain1/4-20 x 3 3/41/4-20x3-3/4 hex head cap screw 316 stainless steel b18.2.13670
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QFCTXHex Head Cap ScrewGrade AZinc/Clear1/4-20 x 3 3/41/4-20x3 3/4 hex cap screw a307 tri-zinc b18.2.1500
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QFCTXHex Head Cap ScrewSteelGalvanized3/4-10 x 3 3/43/4-10x3-3/4 a325 hvy hex bolt hdg domestic (rocap) b18.2.1172
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QFCTXHex Head Cap ScrewSteelGalvanized1 x 3 3/41x3-3/4 a325-1 hvy hex cap screw hdg dom rocap b18.2.169
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QFCTXHex Head Cap Screw316, 317, A4 StainlessPlain1/2-13 x 3 3/41/2-13x3 3/4 hex c/s 316ss f593 b18.2.18
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 3 3/45/16-18x3 3/4 hex c/s gr5 zinc b18.2.1125
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 3 3/45/16-18x3 3/4 hex c/s gr5 zinc b18.2.150
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear3/8-16 x 3 3/43/8-16x3 3/4 hex c/s gr5 zinc b18.2.1621
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear3/8-16 x 3 3/43/8-16x3 3/4 hex c/s gr5 zinc b18.2.120
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear3/8-16 x 3 3/43/8-16x3 3/4 hex c/s gr5 zinc b18.2.1200
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QFCTXHex Head Cap ScrewGrade 8Zinc/Yellow1/2-13 x 3 3/41/2-13x3 3/4 hex c/s gr8 y/zinc b18.2.198
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QFCTXHex Head Cap ScrewGrade 2Zinc/Clear5/8-11 x 3 3/45/8-11x3 3/4 hex c/s gr2 zinc b18.2.1268
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear5/8-11 x 3 3/45/8-11x3 3/4 hex c/s gr5 zinc b18.2.147
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QFCTXHex Head Cap ScrewGrade 8Zinc/Yellow5/8-18 x 3 3/45/8-18x3 3/4 hex c/s gr8 y/zinc b18.2.115
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QFCTXHex Head Cap ScrewGrade 8Zinc/Yellow5/8-18 x 3 3/45/8-18x3 3/4 hex c/s gr8 y/zinc b18.2.198
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QFCTXHex Head Cap ScrewGrade 2Zinc/Clear7/8-9 x 3 3/47/8-9x3 3/4 hex c/s gr2 zinc b18.2.13962
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QFCTXHex Head Cap ScrewGrade 8Zinc/Yellow7/8-9 x 3 3/47/8-9x3 3/4 hex c/s gr8 y/zinc b18.2.111
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CascadeORHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain7/8-9 x 3 3/4hex c/s 18-8ss b18.2.1616
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B & K FASTPAHex Head Cap ScrewGrade 2Zinc/Clear7/16-14 x 3 3/47/16-14 x 3 3/4 hex cap screws gr 2 zinc b18.2.116
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B & K FASTPAHex Head Cap ScrewGrade 8Plain1/2-13 x 3 3/41/2-13 x 3 3/4 hex cap screws gr 8 plain b18.2.11
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B & K FASTPAHex Head Cap ScrewGrade 9Zinc/Yellow1/2-13 x 3 3/41/2-13 x 3 3/4 hex cap screws gr 9 (mc12) z yellow b18.2.120
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Yellow1/2-20 x 3 3/41/2-20 x 3 3/4 hex cap screws gr 8 z yellow b18.2.167
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B & K FASTPAHex Head Cap ScrewGrade 2Zinc/Clear9/16-12 x 3 3/49/16-12 x 3 3/4 hex cap screws gr 2 zinc b18.2.12
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Yellow9/16-12 x 3 3/49/16-12 x 3 3/4 hex cap screws gr 8 z yellow b18.2.1109
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Yellow9/16-18 x 3 3/49/16-18 x 3 3/4 hex cap screws gr 8 z yellow b18.2.113
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B & K FASTPAHex Head Cap ScrewGrade 2Zinc/Clear5/8-11 x 3 3/45/8-11 x 3 3/4 hex cap screws gr 2 zinc b18.2.1439
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B & K FASTPAHex Head Cap ScrewGrade 5Plain5/8-11 x 3 3/45/8-11 x 3 3/4 hex cap screws gr 5 plain b18.2.11287
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B & K FASTPAHex Head Cap ScrewGrade 5Zinc/Clear5/8-11 x 3 3/45/8-11 x 3 3/4 hex cap screws gr 5 zinc b18.2.1585
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B & K FASTPAHex Head Cap ScrewGrade 5Zinc/Yellow5/8-11 x 3 3/45/8-11 x 3 3/4 hex cap screws gr 5 z yellow b18.2.13
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B & K FASTPAHex Head Cap ScrewGrade 8Plain5/8-11 x 3 3/45/8-11 x 3 3/4 hex cap screws gr 8 plain b18.2.1107
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B & K FASTPAHex Head Cap ScrewGrade 5Zinc/Clear5/8-18 x 3 3/45/8-18 x 3 3/4 hex cap screws gr 5 zinc b18.2.1296
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Yellow5/8-18 x 3 3/45/8-18 x 3 3/4 hex cap screws gr 8 z yellow b18.2.183
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B & K FASTPAHex Head Cap ScrewGrade 2Plain3/4-10 x 3 3/43/4-10 x 3 3/4 hex cap screws gr 2 plain b18.2.1115
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B & K FASTPAHex Head Cap ScrewGrade 8Plain3/4-10 x 3 3/43/4-10 x 3 3/4 hex cap screws gr 8 plain b18.2.11
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B & K FASTPAHex Head Cap ScrewGrade 9Zinc/Yellow3/4-10 x 3 3/43/4-10 x 3 3/4 hex cap screws gr 9 z yellow b18.2.121
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B & K FASTPAHex Head Cap ScrewGrade 5Plain3/4-16 x 3 3/43/4-16 x 3 3/4 hex cap screws gr 5 plain b18.2.11
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Yellow3/4-16 x 3 3/43/4-16 x 3 3/4 hex cap screws gr 8 z yellow b18.2.157
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B & K FASTPAHex Head Cap ScrewGrade 5Zinc/Yellow3/4-16 x 3 3/43/4-16 x 3 3/4 hex cap screws gr 5 z yellow b18.2.120
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Marine FastenersFLHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain7/8-9 x 3 3/47/8-9x3-3/4 hex hd cs ss f593d b18.2.13500
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Marine FastenersFLHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 3 3/43/8-16x3-3/4 hex hd cs ss ft f593c b18.2.117618
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Marine FastenersFLHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-24 x 3 3/45/16-24x3-3/4 hex hd c/s 18-8 ss f593c w/2 thread b18.2.1875
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QFCTXHex Head Cap ScrewSteelPlain1 x 3 3/41x3 3/4 a325-3 hvy hex cap screw b18.2.12
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QFCTXHex Head Cap ScrewGrade 8Plain1/4-20 x 3 3/41/4-20 x 3-3/4 hex cap screw grade 8 b18.2.11600
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QFCTXHex Head Cap ScrewGrade 5Plain3/8-16 x 3 3/43/8-16 x 3 3/4 hex cap screw grade 5 b18.2.1538
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QFCTXHex Head Cap ScrewGrade 5Plain1/2-13 x 3 3/41/2-13 x 3 3/4 hex cap screw gr 5 copper b18.2.13
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JET FITTINGCAHex Head Cap ScrewGrade 8Zinc/Yellow1/4-20 x 3 3/41/4-20x3-3/4 (pt) hex cap screw steel grade-8 zinc yellow b18.2.1250
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NBSILHex Head Cap ScrewGrade 5Zinc/Clear7/16-14 x 3 3/47/16-14 x 3-3/4 gr.5 hex cap screw zinc b18.2.147.06
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OBRIENOHHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain7/8-9 x 3 3/4hex hed c/s ss asme/ ansi b18.2.12
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THRDFASTFLHex Head Cap ScrewGrade 2Plain1/4-20 x 3 3/4gr2 hex c/s b18.2.12,090
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THRDFASTFLHex Head Cap ScrewGrade 2Plain5/16-18 x 3 3/4gr2 hex c/s b18.2.1502
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THRDFASTFLHex Head Cap ScrewGrade 2Plain7/8-9 x 3 3/4gr2 hex c/s b18.2.1493
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THRDFASTFLHex Head Cap ScrewGrade 2Plain3/8-16 x 3 3/4gr2 hex c/s b18.2.1437
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THRDFASTFLHex Head Cap ScrewGrade 5Zinc/Clear7/16-14 x 3 3/4gr5 hex c/s b18.2.1375
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THRDFASTFLHex Head Cap ScrewGrade 8Zinc/Yellow3/8-16 x 3 3/4gr8 hex c/s z&y b18.2.1130
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THRDFASTFLHex Head Cap ScrewGrade 2Zinc/Clear3/4-10 x 3 3/4gr2 hex c/s b18.2.191
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THRDFASTFLHex Head Cap ScrewGrade 8Zinc/Yellow1/4-20 x 3 3/4gr8 hex c/s z&y b18.2.150
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THRDFASTFLHex Head Cap Screw316, 317, A4 StainlessPlain3/8-16 x 3 3/4t-316 ss hex c/s b18.2.145
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THRDFASTFLHex Head Cap ScrewGrade 5Zinc/Clear1-8 x 3 3/4gr5 hex c/s b18.2.135
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THRDFASTFLHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 3 3/4gr5 hex c/s b18.2.134
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THRDFASTFLHex Head Cap ScrewGrade 8Plain3/4-10 x 3 3/4gr8 hex c/s b18.2.132
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THRDFASTFLHex Head Cap ScrewGrade 2Plain1-8 x 3 3/4gr2 hex c/s b18.2.130
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THRDFASTFLHex Head Cap ScrewGrade 2Zinc/Clear7/8-9 x 3 3/4gr2 hex c/s b18.2.121
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THRDFASTFLHex Head Cap ScrewGrade 5Plain5/8-11 x 3 3/4gr5 hexc/s domestic b18.2.120
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THRDFASTFLHex Head Cap ScrewGrade 5Zinc/Clear1/4-20 x 3 3/4gr5 hex c/s b18.2.120
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THRDFASTFLHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 3 3/418-8 ss hex c/s b18.2.125
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THRDFASTFLHex Head Cap ScrewGrade 2Zinc/Clear5/8-11 x 3 3/4gr2 hex c/s b18.2.118
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THRDFASTFLHex Head Cap ScrewSuperalloy (Inconel, Hastelloy, Alloy 20)Plain7/8-9 x 3 3/4hex c/s b18.2.115
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THRDFASTFLHex Head Cap ScrewGrade 8Zinc/Yellow3/4-10 x 3 3/4gr8 hex c/s z&y b18.2.112
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QFSMIHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3 3/4c/s , USS thread (18-8) b18.2.140
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QFSMIHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 3/4c/s , USS thread (18-8) b18.2.1350
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