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3 1/4 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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GLFOHHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3 1/41/2-13x3-1/4 hhcs 18-8 s/s b18.2.1 () () ()50,000
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GLFOHHex Head Cap ScrewGrade 8Zinc/Yellow1/2-13 x 3 1/41/2-13x3-1/4 hhcs grade 8 stl zy b18.2.1 () () ()1875,000
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 3 1/41/2-13x3-1/4 hhcs grade 5 stl zc b18.2.1 () () ()30,000
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear3/4-10 x 3 1/43/4-10x3-1/4 hhcs grade 5 stl zc b18.2.1 () () ()18,000
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GLFOHHex Head Cap ScrewGrade 8Zinc/Yellow3/4-10 x 3 1/43/4-10x3-1/4 hhcs grade 8 stl zy b18.2.1 () () ()132,000
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear3/8-16 x 3 1/43/8-16x3-1/4 hhcs grade 5 stl zc b18.2.1 () () ()818,000
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear1/4-20 x 3 1/41/4-20x3-1/4 hhcs grade 5 stl zc b18.2.1 () () ()157,000
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GLFOHHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 1/45/16-18x3-1/4 hhcs 18-8 s/s b18.2.1 () () ()13,000
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GLFOHHex Head Cap ScrewGrade 8Zinc/Yellow5/8-11 x 3 1/45/8-11x3-1/4 hhcs grade 8 stl zy b18.2.1 () () ()62,000
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear5/8-11 x 3 1/45/8-11x3-1/4 hhcs grade 5 stl zc b18.2.1 () () ()368,000
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GLFOHHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 1/45/8-11x3-1/4 hhcs 18-8 s/s b18.2.1 () () ()83,000
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear5/8-18 x 3 1/45/8-18x3-1/4 hhcs grade 5 stl zc b18.2.1 () () ()48,000
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear7/16-14 x 3 1/47/16-14x3-1/4 hhcs grade 5 stl zc b18.2.1 () () ()49,000
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear3/8-24 x 3 1/43/8-24x3-1/4 hhcs grade 5 stl zc b18.2.1 () () ()64,000
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GLFOHHex Head Cap ScrewGrade 5Zinc/Clear7/8-9 x 3 1/47/8-9x3-1/4 hhcs grade 5 stl zc b18.2.1 () () ()42,000
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GLFOHHex Head Cap ScrewGrade 8Zinc/Yellow7/8-9 x 3 1/47/8-9x3-1/4 hhcs grade 8 stl zy b18.2.1 () () ()49,000
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GLFOHHex Head Cap ScrewGrade 5Plain1/2-13 x 3 1/41/2-13x3-1/4 hhcs grade 5 stl pln b18.2.1 () () ()609,000
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GLFOHHex Head Cap ScrewGrade 5Plain3/4-10 x 3 1/43/4-10x3-1/4 hhcs grade 5 stl pln b18.2.1 () () ()48,000
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GLFOHHex Head Cap ScrewGrade 8Plain3/4-10 x 3 1/43/4-10x3-1/4 hhcs grade 8 stl pln b18.2.1 () () ()76,000
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GLFOHHex Head Cap ScrewGrade 8Plain1-8 x 3 1/41-8x3-1/4 hhcs grade 8 stl pln b18.2.1 () () ()8,000
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Irwin IndOntHex Head Cap ScrewGrade 8Zinc/Yellow1/2-20 x 3 1/41/2-20 x 3-1/4 hex capscrew grade 8 zinc dichromate b18.2.1125
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Irwin IndOntHex Head Cap ScrewGrade 2Zinc/Black3/8-16 x 3 1/43/8-16 x 3 1/4 unc gr 2 hhcs .0002 min zinc trivalent black b18.2.1500
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Irwin IndOntHex Head Cap ScrewGrade 8Zinc/Yellow1/2-13 x 3 1/41/2-13 x 3 1/4 unc gr 8 hhcs drill hd .125 znc yellow .0003 b18.2.154
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow1-8 x 3 1/41-8 x 3 1/4 h/c dom gr 8 yel znc b18.2.12
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1-8 x 3 1/41-8 x 3 1/4 h/c s/s b18.2.12
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear1/4-20 x 3 1/41/4-20 x 3 1/4 h/c gr 5 znc b18.2.1100
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow1/4-20 x 3 1/41/4-20 x 3 1/4 h/c dom gr 8 yel znc b18.2.1100
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3 1/41/4-20 x 3 1/4 h/c s/s b18.2.156
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow1/4-28 x 3 1/41/4-28 x 3 1/4 h/c dom gr 8 yel znc b18.2.130
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 3 1/45/16-18 x 3 1/4 h/c gr 5 znc b18.2.1287
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow5/16-18 x 3 1/45/16-18 x 3 1/4 h/c dom gr 8 yel znc b18.2.1183
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 1/45/16-18 x 3 1/4 h/c s/s b18.2.134
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow5/16-24 x 3 1/45/16-24 x 3 1/4 h/c dom gr 8 yel znc b18.2.1226
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear3/8-16 x 3 1/43/8-16 x 3 1/4 h/c gr 5 znc b18.2.1493
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow3/8-16 x 3 1/43/8-16 x 3 1/4 h/c dom gr 8 yel znc b18.2.1272
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow3/8-24 x 3 1/43/8-24 x 3 1/4 h/c dom gr 8 yel znc b18.2.123
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AbabaCAHex Head Cap ScrewGrade 8Plain7/16-14 x 3 1/47/16-14 x 3 1/4 h/c al-2000 (black) gr 8 b18.2.1461
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow7/16-14 x 3 1/47/16-14 x 3 1/4 h/c dom gr 8 yel znc b18.2.1333
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow7/16-20 x 3 1/47/16-20 x 3 1/4 h/c dom gr 8 yel znc b18.2.1160
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AbabaCAHex Head Cap Screw316, 317, A4 StainlessPlain1/2-13 x 3 1/41/2-13 x 3 1/4 h/c 316 s/s b18.2.148
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow1/2-13 x 3 1/41/2-13 x 3 1/4 h/c dom gr 8 yel znc b18.2.1130
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AbabaCAHex Head Cap ScrewGrade 9Zinc/Yellow1/2-13 x 3 1/41/2-13 x 3 1/4 h/c gr.9 yel znc b18.2.125
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow1/2-20 x 3 1/41/2-20 x 3 1/4 h/c dom gr 8 yel znc b18.2.187
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SIIINHex Head Cap ScrewGrade 2Zinc/Clear1/4-20 x 3 1/41/4-20x3 1/4 (pt) grade 2 hex cap screw zinc cr+3 b18.2.1512
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SIIINHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 3 1/43/4-10 x 3 1/4 hcs 18-8 stainless b18.2.118
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StandardMAHex Head Cap ScrewSilicon BronzePlain1/2-13 x 3 1/41/2-13x3-1/4 hex cap screw silicon bronze b18.2.1809
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StandardMAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 3 1/43/4-10x3-1/4 hex cap screw 18-8 stainless steel b18.2.1351
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StandardMAHex Head Cap Screw316, 317, A4 StainlessPlain1/2-13 x 3 1/41/2-13x3-1/4 hex head cap screw 316 stainless steel b18.2.1841
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StandardMAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3 1/45/8-11x3-1/4 hex cap screw 18-8 stainless steel b18.2.11090
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QFCTXHex Head Cap ScrewGrade 8Plain5/16-18 x 3 1/45/16-18x3 1/4 hex c/s gr8 plain b18.2.1200
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QFCTXHex Head Cap ScrewGrade 2Plain1/2-13 x 3 1/41/2-13x3 1/4 hex cap screw grade 2 b18.2.1144
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QFCTXHex Head Cap ScrewGrade 5Galvanized3/8-16 x 3 1/43/8-16x3 1/4 hex c/s gr5 hdg domestic b18.2.1295
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QFCTXHex Head Cap ScrewGrade 5Galvanized3/8-16 x 3 1/43/8-16x3 1/4 hex c/s gr5 hdg domestic b18.2.1645
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QFCTXHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 1/45/16-18x3 1/4 hex c/s 18-8 b18.2.119
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear1/4-20 x 3 1/41/4-20x3 1/4 hex c/s gr5 zinc b18.2.1244
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 3 1/45/16-18x3 1/4 hex c/s gr5 zinc b18.2.192
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QFCTXHex Head Cap ScrewGrade 8Zinc/Yellow5/16-18 x 3 1/45/16-18x3 1/4 hex c/s gr8 y/zinc b18.2.1246
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QFCTXHex Head Cap ScrewGrade 2Zinc/Clear3/8-16 x 3 1/43/8-16x3 1/4 hex c/s gr2 zinc b18.2.1860
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear3/8-16 x 3 1/43/8-16x3 1/4 hex c/s gr5 zinc b18.2.1154
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QFCTXHex Head Cap ScrewGrade 8Zinc/Yellow3/8-16 x 3 1/43/8-16x3 1/4 hex c/s gr8 y/zinc b18.2.118
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QFCTXHex Head Cap ScrewGrade 2Zinc/Clear1/2-13 x 3 1/41/2-13x3 1/4 hex c/s gr2 zinc b18.2.1125
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 3 1/41/2-13x3 1/4 hex c/s gr5 zinc b18.2.1118
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QFCTXHex Head Cap ScrewGrade 8Zinc/Yellow1/2-20 x 3 1/41/2-20x3 1/4 hex c/s gr8 y/zinc b18.2.115
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QFCTXHex Head Cap ScrewGrade 8Zinc/Yellow1/2-20 x 3 1/41/2-20x3 1/4 hex c/s gr8 y/zinc b18.2.130
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear5/8-11 x 3 1/45/8-11x3 1/4 hex c/s gr5 zinc b18.2.135
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear5/8-11 x 3 1/45/8-11x3 1/4 hex c/s gr5 zinc b18.2.198
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QFCTXHex Head Cap ScrewGrade 8Zinc/Yellow5/8-11 x 3 1/45/8-11x3 1/4 hex c/s gr8 y/zinc b18.2.162
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QFCTXHex Head Cap ScrewGrade 5Zinc/Clear3/4-10 x 3 1/43/4-10x3 1/4 hex c/s gr5 zinc b18.2.153
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QFCTXHex Head Cap ScrewGrade 8Zinc/Yellow3/4-10 x 3 1/43/4-10x3 1/4 hex c/s gr8 y/zinc b18.2.1147
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Clear7/16-14 x 3 1/47/16-14 x 3 1/4 hex cap screws gr 8 zinc b18.2.17
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B & K FASTPAHex Head Cap ScrewGrade 5Plain1/2-20 x 3 1/41/2-20 x 3 1/4 hex cap screws gr 5 plain b18.2.148
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B & K FASTPAHex Head Cap ScrewGrade 8Plain1/2-20 x 3 1/41/2-20 x 3 1/4 hex cap screws gr 8 plain b18.2.115
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B & K FASTPAHex Head Cap ScrewGrade 9Zinc/Clear1/2-20 x 3 1/41/2-20 x 3 1/4 hex cap screws gr 9 (mc12) zinc b18.2.18
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B & K FASTPAHex Head Cap ScrewGrade 5Zinc/Clear9/16-12 x 3 1/49/16-12 x 3 1/4 hex cap screws gr 5 zinc b18.2.112
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B & K FASTPAHex Head Cap ScrewGrade 2Plain5/8-11 x 3 1/45/8-11 x 3 1/4 hex cap screws gr 2 plain b18.2.1193
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B & K FASTPAHex Head Cap ScrewGrade 8Plain5/8-11 x 3 1/45/8-11 x 3 1/4 hex cap screws gr 8 plain nylon patch b18.2.137
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Clear5/8-11 x 3 1/45/8-11 x 3 1/4 hex cap screws gr 8 zinc b18.2.14
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B & K FASTPAHex Head Cap ScrewGrade 5Zinc/Clear5/8-18 x 3 1/45/8-18 x 3 1/4 hex cap screws gr 5 zinc b18.2.1134
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B & K FASTPAHex Head Cap ScrewGrade 8Plain5/8-18 x 3 1/45/8-18 x 3 1/4 hex cap screws gr 8 plain b18.2.11
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Yellow5/8-18 x 3 1/45/8-18 x 3 1/4 hex cap screws gr 8 z yellow b18.2.195
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B & K FASTPAHex Head Cap ScrewGrade 2Plain3/4-10 x 3 1/43/4-10 x 3 1/4 hex cap screws gr 2 plain b18.2.11161
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B & K FASTPAHex Head Cap ScrewGrade 8Plain3/4-16 x 3 1/43/4-16 x 3 1/4 hex cap screws gr 8 plain b18.2.147
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Yellow3/4-16 x 3 1/43/4-16 x 3 1/4 hex cap screws gr 8 z yellow b18.2.120
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Clear7/8-14 x 3 1/47/8-14 x 3 1/4 hex cap screws gr 8 zinc b18.2.11
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Yellow7/8-14 x 3 1/47/8-14 x 3 1/4 hex cap screws gr 8 z yellow b18.2.111
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B & K FASTPAHex Head Cap ScrewGrade 5Zinc/Clear1-8 x 3 1/41-8 x 3 1/4 hex cap screws gr 5 zinc b18.2.168
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B & K FASTPAHex Head Cap ScrewGrade 8Plain1-8 x 3 1/41-8 x 3 1/4 hex cap screws gr 8 plain b18.2.13
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B & K FASTPAHex Head Cap ScrewGrade 5Zinc/Clear1-14 x 3 1/41-14 x 3 1/4 hex cap screws gr 5 zinc b18.2.111
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B & K FASTPAHex Head Cap ScrewGrade 8Zinc/Yellow1-14 x 3 1/41-14 x 3 1/4 hex cap screws gr 8 z yellow b18.2.113
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WurthOntHex Head Cap ScrewGrade 5Zinc/Clear1/2-13 x 3 1/4scr hcs gr5 (zn) 1/2-13x3 1/4 b18.2.121
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THRDFASTFLHex Head Cap ScrewGrade 2Plain5/16-18 x 3 1/4gr2 hex c/s b18.2.11,555
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THRDFASTFLHex Head Cap ScrewGrade 5Zinc/Clear1/4-20 x 3 1/4gr5 hex c/s b18.2.11,382
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THRDFASTFLHex Head Cap ScrewGrade 8Zinc/Yellow1/4-20 x 3 1/4gr8 hex c/s z&y b18.2.1398
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THRDFASTFLHex Head Cap ScrewGrade 2Plain3/8-16 x 3 1/4gr2 hex c/s b18.2.176
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THRDFASTFLHex Head Cap ScrewGrade 8Zinc/Yellow5/8-11 x 3 1/4gr8 hex c/s z&y b18.2.170
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THRDFASTFLHex Head Cap ScrewGrade 8Zinc/Yellow7/8-9 x 3 1/4gr8 hex c/s z&y b18.2.159
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THRDFASTFLHex Head Cap ScrewGrade 8Zinc/Yellow3/8-16 x 3 1/4gr8 hex c/s z&y b18.2.160
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THRDFASTFLHex Head Cap ScrewGrade 2Zinc/Clear1/2-13 x 3 1/4gr2 hex c/s b18.2.156
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THRDFASTFLHex Head Cap ScrewGrade 2Plain5/8-11 x 3 1/4gr2 hex c/s b18.2.153
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THRDFASTFLHex Head Cap ScrewGrade 5Zinc/Clear7/16-14 x 3 1/4gr5 hex c/s b18.2.149
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THRDFASTFLHex Head Cap ScrewGrade 2Zinc/Clear5/16-18 x 3 1/4gr2 hex c/s b18.2.138
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THRDFASTFLHex Head Cap ScrewGrade 2Plain7/8-9 x 3 1/4gr2 hex c/s b18.2.128
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THRDFASTFLHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 1/418-8 ss hex c/s b18.2.124
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THRDFASTFLHex Head Cap ScrewGrade 5Plain3/4-10 x 3 1/4gr5 hex c/s b18.2.122
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THRDFASTFLHex Head Cap ScrewGrade 8Zinc/Yellow3/4-10 x 3 1/4gr8 hex c/s z&y b18.2.120
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THRDFASTFLHex Head Cap Screw316, 317, A4 StainlessPlain7/8-9 x 3 1/4t-316 ss hex c/s b18.2.119
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THRDFASTFLHex Head Cap ScrewGrade 8Zinc/Yellow1/2-13 x 3 1/4gr8 hex c/s z&y b18.2.125
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THRDFASTFLHex Head Cap ScrewGrade 2Zinc/Clear1-8 x 3 1/4gr2 hex c/s b18.2.111
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THRDFASTFLHex Head Cap ScrewGrade 8Plain5/8-11 x 3 1/4gr8 hex c/s b18.2.115
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THRDFASTFLHex Head Cap ScrewGrade 8Zinc/Yellow1-8 x 3 1/4gr8 hex c/s z&y b18.2.12
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QFSMIHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3 1/4c/s , USS thread (18-8) b18.2.1stock
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QFSMIHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 1/4c/s , USS thread (18-8) b18.2.1stock
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