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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.
181,141 Hex Head Cap Screw, showing 200, (click on any line for more information)
| Buy Hex Cap Screws from one of our FCH Network Members | ||||||||
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| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| MAINSOURC | NH | Hex Head Cap Screw | Brass | Plain | 5/16-18 x 1 1/2 | hex c/s | 400 |
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| MAINSOURC | NH | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 1 5/8 | hex c/s 18-8 ss | 2113 |
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| MAINSOURC | NH | Hex Head Cap Screw | Grade 2 | Plain | 5/16-18 x 1 1/2 | hex c/s z/clr | 3100 |
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| MAINSOURC | NH | Hex Head Cap Screw | Grade 2 | Plain | 5/16-18 x 2 1/4 | hex c/s z/clr | 60 |
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| MAINSOURC | NH | Hex Head Cap Screw | Grade 2 | Plain | 5/16-18 x 3 | hex c/s f/t z/clr | 298 |
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| MAINSOURC | NH | Hex Head Cap Screw | Grade 2 | Plain | 5/16-18 x 3 | hex c/s z/clr | 350 |
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| MAINSOURC | NH | Hex Head Cap Screw | Grade 2 | Plain | 5/16-18 x 2 | hex c/s z/clr | 908 |
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| MAINSOURC | NH | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 1 3/4 | hex c/s z/clr | 5039 |
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| MAINSOURC | NH | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 1/2 | hex c/s dfars | 100 |
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| MAINSOURC | NH | Hex Head Cap Screw | Brass | Plain | 5/16-18 x 3/4 | hex c/s | 70 |
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| MAINSOURC | NH | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 3/4 | hex c/s blk | 106 |
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| MESAFAST | CA | Hex Head Cap Screw | Grade 2 | Zinc/Clear | 5/16-18 x 1 | hex c/s gr2 | 3,500.0 |
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| BIG BOLT | IL | Hex Head Cap Screw | Grade B | Plain | 5/16-18 x 4 1/2 | bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.6 | 296 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 5 1/2 | (pt) coarse gr5 hex c/s med carb zp | 25 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 6 | (pt) coarse gr5 hex c/s med carb | 12 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 2 1/2 | (pt) coarse gr5 hex c/s med carb zp | 45 |
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| ASMC | IL | Hex Head Cap Screw | Grade 9 | Zinc/Yellow | 5/16-18 x 3 | 5/16-18x3 (pt) coarse gr9 hex c/s l9-usa | 35 |
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| ASMC | IL | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 6 | (pt) coarse gr8 hex c/s | 50 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 6 1/2 | coarse gr5 hex c/s med carb zp | 1 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 5 | (pt) coarse gr5 hex c/s med carb zp | 53 |
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| ASMC | IL | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 1 3/8 | (pt) coarse gr8 hex c/s | 50 |
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| ASMC | IL | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 3/4 | (ft) coarse hex c/s ss18-8 | 955 |
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| ASMC | IL | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 4 | (pt) coarse gr8 hex c/s -usa | 300 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 6 | (pt) coarse gr5 hex c/s med carb zp | 100 |
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| ASMC | IL | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 6 1/2 | coarse gr8 hex c/s | 85 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Zinc/Yellow | 5/16-18 x 3/8 | coarse gr5 hex c/s | 34 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 3 1/4 | (pt) coarse gr5 hex c/s med carb zp | 142 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 7 | (pt) coarse gr5 hex c/s med carb zp | 109 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 4 1/2 | (pt) coarse gr5 hex c/s med carb zp | 145 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 4 | (pt) coarse gr5 hex c/s med carb zp | 164 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 4 | (pt) coarse gr5 hex c/s med carb | 130 |
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| ASMC | IL | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 5 | (pt) coarse gr8 hex c/s | 166 |
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| ASMC | IL | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 8 | (pt) coarse gr5 hex c/s med carb | 77 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 2 | 5/16-18 x 2 gr.5 zn hex hd bolts f/th | 1,370 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 1 3/4 | 5/16-18 x 1 3/4 gr.5 zn hex hd bolts | 1,035 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 2 1/2 | 5/16-18 x 2 1/2 gr.5 zn hex hd bolts | 588 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 3 1/2 | 5/16-18 x 3 1/2 gr.5 zn hex hd bolts | 906 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 1 | 5/16-18 x 1 gr.5 zn hex hd bolts f/th | 892 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 3 1/4 | 5/16-18 x 3 1/4 gr.5 zn hex hd bolts | 450 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 5/8 | 5/16-18 x 5/8 gr.5 zn hex hd bolts f/th | 890 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 2 1/4 | 5/16-18 x 2 1/4 gr.5 zn hex hd bolts | 500 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 3/4 | 5/16-18 x 3/4 gr.5 zn hex hd bolts f/th | 13,763 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 1 1/2 | 5/16-18 x 1 1/2 gr.5 zn hex hd bolts | 1,517 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 2 3/4 | 5/16-18 x 2 3/4 g5 zn hex hd bolt | 390 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 7/8 | 5/16-18 x 7/8 gr.5 zn hex hd bolts f/th | 900 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 1 1/4 | 5/16-18 x 1 1/4 gr.5 zn hex hd bolts | 927 |
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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 4 | 5/16-18 x 4 gr.5 zn hex hd bolts | 400 |
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| MTP | CA | Hex Head Cap Screw | Grade 8 | Black Oxide | 5/16-18 x 1 | 5/16-18 x 1 gr.8 blk hex hd bolts f/th | 400 |
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| MTP | CA | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 1/2 | 5/16-18 x 1/2 gr.8 y/zn hex hd bolts | 30,778 |
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| MTP | CA | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 3/4 | 5/16-18 x 3/4 gr.8 y/zn hex hd bolts | 1,800 |
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| MTP | CA | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 1 3/4 | 5/16-18 x 1 3/4 gr.8 y/zn hex hd bolts | 900 |
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| MTP | CA | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 2 1/2 | 5/16-18 x 2 1/2 gr.8 y/zn hex hd bolts | 480 |
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| MTP | CA | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 2 | 5/16-18 x 2 gr.8 y/zn hex hd bolts | 940 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 9 | Plain | 5/16-18 x 1 | 8640 chrme nickl c/s g9 | 1288 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 2 1/4 | hex c/s | 606 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 2 1/4 | c/s | 2300 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 2 3/4 | c/s | 792 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 2 3/4 | hex c/s | 325 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 3 | c/s | 1500 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 3 1/4 | c/s | 420 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 3 1/4 | hex c/s | 1475 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 3 3/4 | c/s | 760 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 3 3/4 | hex c/s | 395 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 4 1/4 | hcs zp | 564 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 4 1/2 | c/s | 645 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 5 | c/s | 799 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 1/2 | hex c/s | 2072 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 1 3/8 | c/s | 24500 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 6 | hex c/s | 405 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 5/8 | hhcs - | 6135 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 5/8 | hex c/s | 12591 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 7 | hhcs - | 680 |
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| Alma Bolt | MI | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 7 | hex c/s | 1154 |
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| Kanebridge | IL | Hex Head Cap Screw | Grade 2 | Black Oxide | 5/16-18 x 1/2 | 5/16-18x1/2 hex cap screw grade 2 non a307 black oxide and oil | 48.750 |
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| Kanebridge | IL | Hex Head Cap Screw | Grade 2 | Black Oxide | 5/16-18 x 1 1/4 | 5/16-18x1 1/4 hex cap screw grade 2 non a307 black oxide and oil | 27.500 |
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| Kanebridge | IL | Hex Head Cap Screw | Grade 2 | Black Oxide | 5/16-18 x 5/8 | 5/16-18x5/8 hex cap screw grade 2 non a307 black oxide and oil | 45,000 |
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| Kanebridge | IL | Hex Head Cap Screw | Grade 2 | Black Oxide | 5/16-18 x 3/4 | 5/16-18x3/4 hex cap screw grade 2 non a307 black oxide and oil | 41.250 |
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| KBS | TN | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 4 | 5/16-18 x 4 hex cap/screw fullthread! s/s b18.2.1 | 4,373 |
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| KBS | TN | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 5 | 5/16-18 x 5 hex cap/screw s/s b18.2.1 | 850 |
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| KBS | TN | Hex Head Cap Screw | Silicon Bronze | Painted | 5/16-18 x 5/8 | 5/16-18 x 5/8 sil.bronze hex cap/s b18.2.1 | 200 |
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| KBS | TN | Hex Head Cap Screw | Silicon Bronze | Painted | 5/16-18 x 3/4 | 5/16-18 x 3/4 sil.bronze hex cap/s b18.2.1 | 919 |
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| KBS | TN | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 2 3/4 | 5/16-18 x 2 3/4 hex cap/s alloy gr-8 yellowznc b18.2.1 | 1,712 |
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| KBS | TN | Hex Head Cap Screw | Grade 5 | Plain | 5/16-18 x 5/8 | 5/16-18 x 5/8 hex c/s w/patch gr 5 b18.2.1 | 2,600 |
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| KBS | TN | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 5/8 | 5/16-18 x 5/8 hex cap/s alloy gr-8 b18.2.1 | 9,851 |
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| KBS | TN | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 2 | 5/16-18 x 2 hex cap/screw fullthread! s/s b18.2.1 | 919 |
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| KBS | TN | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 3 3/4 | 5/16-18 x 3 3/4 hex cap/screw s/s b18.2.1 | 798 |
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| KBS | TN | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 2 1/2 | 5/16-18 x 2 1/2 hex cap/s gr-5 fullthread! pltd b18.2.1 | 2,272 |
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| KBS | TN | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 3 1/4 | 5/16-18 x 3 1/4 hex cap/s alloy gr-8 b18.2.1 | 2,064 |
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| KBS | TN | Hex Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 2 1/2 | 5/16-18 x 2 1/2 hex cap/screw fullthread! s/s b18.2.1 | 914 |
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| KBS | TN | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 5 1/2 | 5/16-18 x 5 1/2 hex cap/s alloy gr-8 b18.2.1 | 793 |
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| KBS | TN | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 5 | 5/16-18 x 5 hex cap/s alloy gr-8 b18.2.1 | 1,397 |
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| KBS | TN | Hex Head Cap Screw | Grade 8 | Plain | 5/16-18 x 6 | 5/16-18 x 6 hex cap/s alloy gr-8 b18.2.1 | 1,595 |
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| KBS | TN | Hex Head Cap Screw | Grade 8 | Zinc/Yellow | 5/16-18 x 7/8 | 5/16-18 x 7/8 hex cap/s alloy gr-8 yellowznc b18.2.1 | 5,394 |
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| MMF | MI | Hex Head Cap Screw | 316, 317, A4 Stainless | Plain | 5/16-18 x 3/4 | 5/16-18 x 3/4 hhcs mil-dtl-1222j ty 1 gr 316cw usa m1222rn5c212sdnn b18.2.1 | 230 |
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| MMF | MI | Hex Head Cap Screw | Ni-Cu Alloy (Monel, K-Monel, etc.) | Electrolytic Zinc Basecoat + Topcoats (Climacoat, Climaseal, etc.) | 5/16-18 x 3 1/4 | 5/16-18 x 3-1/4 k500 hhcs mil-dtl-1222j ty 1 gr 500 usa m1222rn5c252ncnn b18.2.1 | 5 |
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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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| MTP | CA | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 3 | 5/16-18 x 3 gr.5 zn hex hd bolts f/th | 80 |
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| AMI | TX | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 2 3/4 | 20,000 |
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| AMI | TX | Hex Head Cap Screw | Grade 5 | Zinc/Clear | 5/16-18 x 4 1/2 | 20,000 |
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