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5/16-18 Hex Cap Screws
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.
175,582 Hex Head Cap Screw, showing 200, (click on any line for more information)
| Search Results Sponsored by Spring Bolt & Nut Mfg., your source for Hex Head Cap Screws. For more results, visit www.springboltandnut.com | ||||||||
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| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| Spring Bo | TX | Hex Head Cap Screw | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 5/16-18 x 1/2 | 5/16(18) x 1/2 hex cap screw A453 grade 660B (A286) b18.2.1 b18.2.1 usa | inquire |
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| Spring Bo | TX | Hex Head Cap Screw | Duplex Stainless (2205, Ferralium etc.) | Plain | 5/16-18 x 3/4 | 5/16(18) x 3/4 hex cap screw d2205 b18.2.1 b18.2.1 usa | inquire |
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| Spring Bo | TX | Hex Head Cap Screw | Duplex Stainless (2205, Ferralium etc.) | Plain | 5/16-18 x 1 3/4 | 5/16(18) x 1-3/4 hex cap screw d2205 b18.2.1 b18.2.1 usa | inquire |
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| Spring Bo | TX | Hex Head Cap Screw | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 5/16-18 x 1 | 5/16(18) x 1 hex cap screw al6xn b18.2.1 b18.2.1 usa | inquire |
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| Buy Hex Cap Screws from one of our FCH Network Partners | ||||||||
| Zoro Tools Inc. | Hex Head Cap Screw | Grade 2 | Plain | 5/16-18 | 5/16-18 grade 2 hex head cap screw steel pk 100 |
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| Zoro Tools Inc. | Hex Head Cap Screw | Grade 2 | Plain | 5/16-18 | 5/16-18 grade 2 hex head cap screw steel pk 100 |
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| Zoro Tools Inc. | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 | 5/16-18 grade 8 hex head cap screw steel pk 25 |
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| Zoro Tools Inc. | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 | 5/16-18 grade 8 hex head cap screw steel pk 50 |
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| Buy Hex Cap Screws from one of our FCH Network Members | ||||||||
| VertexD | IL | Hex Head Cap Screw | Silicon Bronze | Plain | 5/16-18 x 2 1/2 | 5/16-18x2-1/2 hex hd c/s 651 sil brnz | 2938 |
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| VertexD | IL | Hex Head Cap Screw | Silicon Bronze | Plain | 5/16-18 x 2 1/2 | 5/16-18x2-1/2 hex hd c/s 651 sil brnz | 3,601 |
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| ACF | CA | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 3 1/2 | 5/16-18x3-1/2 gr5 hex c/s plain | 250 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 5/8 | 5/16-18x5/8 s/s hex head cap screw | 973 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 7/8 | 5/16-18x7/8 s/s hex head cap screw | 5600 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 3/4 | 5/16-18x3/4 s/s hex head cap screw | 21602 |
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| ACF | CA | Hex Head Cap Screw | 316, 317, A4 Stainless | Plain | 5/16-18 x 3/4 | 5/16-18x3/4 type-316 s/s hex c/s | 41 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 1 1/4 | 5/16-18x1-1/4 s/s hex head cap screw | 175 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 1 1/8 | 5/16-18x1-1/8 s/s hex head cap screw | 4589 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Black Oxide | 5/16-18 x 1 1/4 | 5/16-18x1-1/4 s/s hex c/s black oxide | 600 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 1 | 5/16-18x1 s/s hex head cap screw | 2234 |
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| ACF | CA | Hex Head Cap Screw | 316, 317, A4 Stainless | Plain | 5/16-18 x 1 | 5/16-18x1 type-316 s/s hex c/s | 2045 |
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| ACF | CA | Hex Head Cap Screw | 316, 317, A4 Stainless | Plain | 5/16-18 x 1 1/4 | 5/16-18x1-1/4 type-316 s/s hex c/s | 394 |
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| ACF | CA | Hex Head Cap Screw | Silicon Bronze | Plain | 5/16-18 x 1 1/2 | 5/16-18x1-1/2 silicon bronze hex head cap screw | 200 |
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| ACF | CA | Hex Head Cap Screw | Brass | Plain | 5/16-18 x 1 1/2 | 5/16-18x1-1/2 brass hex head cap screw | 110 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 2 | 5/16-18x2 s/s hex head cap screw | 1320 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 1 3/4 | 5/16-18x1-3/4 s/s hex head cap screw | 1 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 2 1/2 | 5/16-18x2-1/2 s/s hex head cap screw | 425 |
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| Cal Fastenrs | CA | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 1 1/8 | 5/16-18 x 1 1/8 grade 8 hex cap screw plain gr.8 hex cap | 11,400 |
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| MESAFAST | CA | Hex Head Cap Screw | Grade 2 | Zinc/Clear | 5/16-18 x 1 3/4 | hex c/s gr2 | 144.0 |
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| ACF | CA | Hex Head Cap Screw | Silicon Bronze | Plain | 5/16-18 x 3/4 | 5/16-18x3/4 silicon bronze hex head cap screw | 4 |
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| ACF | CA | Hex Head Cap Screw | Nylon | Plain | 5/16-18 x 1 | 5/16-18x1 nylon hex c/s | 500 |
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| ACF | CA | Hex Head Cap Screw | Brass | Plain | 5/16-18 x 1 1/4 | 5/16-18x1 1/4 brass hex c/s | 31 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 3 | 5/16-18x3 s/s hex head cap screw | 85 |
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| ACF | CA | Hex Head Cap Screw | Nylon | Plain | 5/16-18 x 2 1/2 | 5/16-18x2-1/2 nylon hex c/s | 657 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 4 1/2 | 5/16-18x4-1/2 s/s hex head cap screw | 6 |
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| ACF | CA | Hex Head Cap Screw | Grade 2 | Zinc/Clear | 5/16-18 x 2 1/2 | 5/16-18x2-1/2 hex cap screw grade 2 z/p rohs | 88 |
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| ACF | CA | Hex Head Cap Screw | Grade 2 | Zinc/Clear | 5/16-18 x 1 | 5/16-18x1 hex head cap screw gr2 z/p rohs | 30 |
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| ACF | CA | Hex Head Cap Screw | Grade 2 | Zinc/Yellow | 5/16-18 x 1 1/2 | 5/16-18x1-1/2 gr2 hex c/s zinc ii b-633-85 ty-ii cl-13 | 3 |
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| ACF | CA | Hex Head Cap Screw | Grade 5 | Zinc/Yellow | 5/16-18 x 1 3/4 | 5/16-18x1-3/4 gr5 hex c/s zinc ii | 4 |
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| ACF | CA | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 2 3/4 | 5/16-18x2-3/4 gr 5 hex c/s plain patchlok | 1 |
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| ACF | CA | Hex Head Cap Screw | Grade 8 | Zinc/Clear | 5/16-18 x 1 1/2 | 5/16-18x1-1/2 hex head cap screw gr8.2 boron z/p rohs | 152 |
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| ACF | CA | Hex Head Cap Screw | Grade 8 | Zinc/Clear | 5/16-18 x 1 3/4 | 5/16-18x1-3/4 hex head cap screw gr8.2 boron z/p rohs | 159 |
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| ACF | CA | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 2 | 5/16-18x2 hex head cap screw gr8.2 boron zinc ii | 74 |
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| ACF | CA | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 3/4 | 5/16-18x3/4 gr8 hex head cap screw zinc ii domestic | 17 |
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| ACF | CA | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 2 1/4 | 5/16-18x2-1/4 s/s hex head cap screw | 1 |
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| API | IA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 1 3/4 | screw hhc p/t gr5 zncl jds19 ansi b18.2.1 | 385 |
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| API | IA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 3/4 | screw hhc f/t gr5 zncl jds19 ansi b19.2.1 | 1,560 |
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| API | IA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 2 1/4 | screw hhc p/t gr5 zncl jds19 ansi b18.2.1 | 1,000 |
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| API | IA | Hex Head Cap Screw | Grade 8 | Zinc/Clear | 5/16-18 x 1 | screw hhc zncl f/t | 1,054 |
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| API | IA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 2 3/4 | screw hhc p/t gr5 zncl ansi b18.2.1 | 1,250 |
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| API | IA | Hex Head Cap Screw | Grade 2 | Zinc/Clear | 5/16-18 x 6.50 | screw hhc zncl | 2,358 |
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| API | IA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 5/8 | screw hhc f/t gr5 zncl jds19 ansi b18.2.1 | 1,307 |
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| API | IA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 1 1/2 | screw hhc p/t zncl gr5 ansi b18.2.1 | 64 |
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| API | IA | Hex Head Cap Screw | Grade 8 | Zinc/Clear | 5/16-18 x 7 7/8 | screw hhc p/t gr8 zncl ansi b18.2.1 | 674 |
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| API | IA | Hex Head Cap Screw | 316, 317, A4 Stainless | Plain | 5/16-18 x 2 1/2 | screw hhc 316 ss per print#104525 | 1,300 |
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| API | IA | Hex Head Cap Screw | 316, 317, A4 Stainless | Plain | 5/16-18 x 1.75 | bolt hex cap 316 ss | 1,700 |
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| API | IA | Hex Head Cap Screw | Grade 2 | Zinc/Clear | 5/16-18 x 2 1/2 | screw hhc p/t gr2 zncl jds19 | 561 |
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| API | IA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 3 | screw hhc p/t gr5 zncl jds19 | 852 |
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| API | IA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 1 | hhc gr5 | 7,112 |
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| API | IA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 1 1/4 | hhc gr5 | 7,230 |
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| API | IA | Hex Head Cap Screw | 316, 317, A4 Stainless | Plain | 5/16-18 x 2 3/4 | bolt hex cap 316 ss | 70 |
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| ACF | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 2 | 5/16-18x2 gr5 hex head cap screw z/p rohs compliant | 500 |
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| ACF | CA | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 12 | 5/16-18x12 gr8 hex head cap screw zinc ii rohs compliant | 422 |
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| ACF | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 1 3/4 | 5/16-18x1-3/4 hex head cap screw gr5 z/p rohs | 225 |
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| Olander | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 3 1/2 | 5/16-18 x 3 1/2 hex hd usa made gr 5 zn | 102 |
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| ASMC | IL | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 5/8 | (ft) coarse hex c/s ss316 | 50 |
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| ASMC | IL | Hex Head Cap Screw | Grade 9 | Zinc/Yellow | 5/16-18 x 1 1/2 | 5/16-18x1 1/2 (pt) coarse gr9 hex c/s l9-usa | 50 |
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| ASMC | IL | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 2 1/4 | (pt) coarse gr8 hex c/s -usa | 300 |
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| ASMC | IL | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 5 1/2 | (pt) coarse hex c/s ss18-8 | 125 |
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| ASMC | IL | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 5/8 | (ft) coarse hex c/s ss18-8 | 233 |
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| ASMC | IL | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 1 1/8 | (ft) coarse gr8 hex c/s -usa | 975 |
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| ASMC | IL | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 1 3/4 | (pt) coarse hex c/s ss316 | 425 |
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| ASMC | IL | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 3 3/4 | (pt) coarse gr8 hex c/s -usa | 350 |
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| ASMC | IL | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 4 | (pt) coarse hex c/s ss18-8 | 125 |
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| NWFAST | TX | Hex Head Cap Screw | 316, 317, A4 Stainless | Plain | 5/16-18 x 1 | 5/16-18 x 1 hex cap screw 316 stainless steel fully threaded b18.2.1 | 13534 |
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| MidStates | MI | Hex Head Cap Screw | Grade 9 | Zinc/Yellow | 5/16-18 x 3 1/2 | 5/16-18 x 3 1/2 hex c/s l-9 z/yel | 60 |
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| MidStates | MI | Hex Head Cap Screw | Titanium | Plain | 5/16-18 x 2 1/4 | 5/16-18 x 2 1/4 hex c/s titanium | 25 |
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| MidStates | MI | Hex Head Cap Screw | Titanium | Plain | 5/16-18 x 1/2 | 5/16-18 x 1/2 hex c/s titanium | 15 |
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| Liberty | IL | Hex Head Cap Screw | Grade 2 | Zinc/Yellow | 5/16-18 x 7/8 | c/s & | 400 |
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| Liberty | IL | Hex Head Cap Screw | Grade 2 | Zinc/Clear | 5/16-18 x 2 1/2 | c/s grade 2 | 600 |
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| Liberty | IL | Hex Head Cap Screw | Grade 2 | Zinc/Clear | 5/16-18 x 2 | c/s grade 2 | 800 |
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| Liberty | IL | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 3 | c/s | 32,845 |
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| Liberty | IL | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 7/8 | c/s | 1,210 |
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| Liberty | IL | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 3/4 | c/s domestic | 1,400 |
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| Liberty | IL | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 1 | c/s & | 2,615 |
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| Liberty | IL | Hex Head Cap Screw | Steel | Plain | 5/16-18 x 3/4 | 5/16-18x3/4 c/s astm a354-17bd | 996 |
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| MMF | MI | Hex Head Cap Screw | 316, 317, A4 Stainless | Plain | 5/16-18 x 2 | 5/16-18 x 2 hhcs 316 s/s ff-s-85 ty ii st 10p usa b18.2.1 | 338 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 1 1/4 | 5/16-18 x 1-1/4 gr 8 hhcs plain b18.2.1 | 900 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 5/8 | 5/16-18 x 5/8 grade 8 hhcs zinc yellow usa domestic b18.2.1 | 1800 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 1 3/4 | 5/16-18 x 1-3/4 grade 8 hhcs zinc yellow usa domestic b18.2.1 | 850 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 3 | 5/16-18 x 3 grade 8 hhcs zinc yellow usa domestic b18.2.1 | 500 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 2 | 5/16-18 x 2 grade 8 hhcs zinc yellow usa domestic b18.2.1 | 800 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 2 1/2 | 5/16-18 x 2-1/2 grade 8 hhcs zinc yellow usa domestic b18.2.1 | 600 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 1 | 5/16-18 x 1 grade 8 hhcs zinc yellow usa domestic b18.2.1 | 1400 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 1 1/4 | 5/16-18 x 1-1/4 grade 8 hhcs zinc yellow usa domestic b18.2.1 | 1100 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 1 1/4 | 5/16-18 x 1-1/4 gr 8 hhcs plain b18.2.1 | 900 |
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| MMF | MI | Hex Head Cap Screw | 316, 317, A4 Stainless | Plain | 5/16-18 x 2 | 5/16-18 x 2 hhcs 316 s/s ff-s-85 ty ii st 10p usa b18.2.1 | 338 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 2 1/2 | 5/16-18 x 2-1/2 grade 8 hhcs zinc yellow usa domestic b18.2.1 | 600 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 1 1/4 | 5/16-18 x 1-1/4 grade 8 hhcs zinc yellow usa domestic b18.2.1 | 1100 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 5/8 | 5/16-18 x 5/8 grade 8 hhcs zinc yellow usa domestic b18.2.1 | 1800 |
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| MMF | MI | Hex Head Cap Screw | 316, 317, A4 Stainless | Plain | 5/16-18 x 2 | 5/16-18 x 2 hhcs 316 s/s ff-s-85 ty ii st 10p usa b18.2.1 | 338 |
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| MMF | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 1 | 5/16-18 x 1 grade 8 hhcs zinc yellow usa domestic b18.2.1 | 1400 |
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| ASMC | IL | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 1 1/8 | (ft) coarse hex c/s ss18-8 | 25 |
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| Big Red | OK | Hex Head Cap Screw | Grade 5 | Galvanized | 5/16-18 x 1 | 5/16-18 x 1 gr 5 hex cap screws-galvanized | 43 |
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| All-Tech Spec | CT | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 1 1/2 | grad 5 | 6,500 |
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| IRF | NC | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 1 1/2 | hex c/sr elw | 1122 |
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| UNEEDA | NJ | Hex Head Cap Screw | Grade 2 | Zinc/Clear | 5/16-18 x 3/4 | hex c/s |
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| Alma Bolt | MI | Hex Head Cap Screw | Brass | Plain | 5/16-18 x 2 | f/t hex c/s | 693 |
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| System 22 | PA | Hex Head Cap Screw | Brass | Plain | 5/16-18 x 1 | hex c/s 464 naval dom. | 620 |
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| System 22 | PA | Hex Head Cap Screw | Brass | Zinc/Clear | 5/16-18 x 7/8 | hex c/s 464 naval dom. | 200 |
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| System 22 | PA | Hex Head Cap Screw | Brass | Plain | 5/16-18 x 1 | 464 naval | 75 |
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| System 22 | PA | Hex Head Cap Screw | Brass | Plain | 5/16-18 x 7/8 | 464 naval | 143 |
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| Alma Bolt | MI | Hex Head Cap Screw | Brass | Plain | 5/16-18 x 1 1/4 | hex c/s | 240 |
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| Alma Bolt | MI | Hex Head Cap Screw | Nylon | Plain | 5/16-18 x 2 | c/s | 203 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 4 | c/s | 250 |
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| UNEEDA | NJ | Hex Head Cap Screw | Grade 2 | Plain | 5/16-18 x 1 1/4 | hex c/s | 38,500 |
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