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1/2 Counterbore Screws (ASME B18. 2.1)
12-point Flange Screws, Counterbore Screws, Ferry Head Cap Screws or Counterbore Screws, feature a 12 point head and a flanged bearing surface. Usually fully threaded, the 12-point design provides for higher tightening torque, without edge rounding and they are covered under ASME Standard B18.2.1
44 results, (click on any line for more information)
| Search Results Sponsored by Metric Threaded Products, Inc., your source for 12 Point Flange Screws. For more results, visit www.metric-threaded.com | ||||||||
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| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| Buy Counterbore Screws from one of our FCH Network Members | ||||||||
| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 | 1/2-13 x 2 12 point cap screw alloy b18.2.1 | 35 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 4 | 1/2-13 x 4 12 point cap screw alloy b18.2.1 | 15 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 1 | 1/2-20 x 1 12 point cap screw alloy b18.2.1 | 94 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 1 1/4 | 1/2-20 x 1 1/4 12 point cap screw alloy b18.2.1 | 68 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 1 1/2 | 1/2-20 x 1 1/2 12 point cap screw alloy b18.2.1 | 42 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 1 3/4 | 1/2-20 x 1 3/4 12 point cap screw alloy b18.2.1 | 70 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 2 1/4 | 1/2-20 x 2 1/4 12 point cap screw alloy b18.2.1 | 59 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 2 1/2 | 1/2-20 x 2 1/2 inch 12 point cap screw alloy b18.2.1 | 35 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 2 3/4 | 1/2-20 x 2 3/4 12 point cap screw alloy b18.2.1 | 15 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 3 | 1/2-20 x 3 12 point cap screw alloy b18.2.1 | 87 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 3 1/4 | 1/2-20 x 3 1/4 12 point cap screw alloy b18.2.1 | 60 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 3 1/2 | 1/2-20 x 3 1/2 12 point cap screw alloy b18.2.1 | 16 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 4 | 1/2-20 x 4 12 point cap screw alloy b18.2.1 | 65 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 4 1/2 | 1/2-20 x 4 1/2 12 point cap screw alloy b18.2.1 | 57 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 5 | 1/2-20 x 5 12 point cap screw alloy b18.2.1 | 21 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 5 1/2 | 1/2-20 x 5 1/2 inch 12 point cap screw alloy b18.2.1 | 19 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 | 1/2-13 x 1 12 point cap screw alloy b18.2.1 | 36 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/2 | 1/2-13 x 1 1/2 12 point cap screw alloy b18.2.1 | 110 |
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| Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 2 | 1/2-20 x 2 12 point cap screw alloy b18.2.1 | 10 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 1/2-13 x 2 1/2 | 1/2-13x2-1/2 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 152 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 1/2-13 x 3 | 1/2-13x3 hex cap-partialthread-grade 8-12 point-plain b18.2.1 () () () | 18 |
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| ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 1 3/4 | fine 12-point fl/b b18.2.1 | 195 |
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| ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 5 | coarse 12-point fl/b b18.2.1 | 25 |
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| ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 3 | 1/2-20x3 fine 12-point flange screw alloy pln b18.2.1 | 8 |
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| QFC | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2 x 1 1/4 | 1/2x1 1/4nc ferry head cap screw b18.2.1 | 100 |
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| QFC | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/2 | 1/2-13x1 1/2 ferry head c/s alloy plain b18.2.1 | 800 |
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| B & K FAST | PA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/4 | 1/2-13 x 1 1/4 12 pt flange bolts b18.2.1 | 25 |
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| B & K FAST | PA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 1/2 | 1/2-13 x 2 1/2 12 pt flange bolts b18.2.1 | 25 |
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| B & K FAST | PA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 2 1/2 | 1/2-20 x 2 1/2 12 pt flange bolts b18.2.1 | 65 |
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| QFC | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2 x 1 1/2 | 1/2x1 1/2nf ferry hd cap screw b18.2.1 | 122 |
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| Bostwick | IN | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 2 1/2 | 1/2-20 x 2 1/2 12 pt. counterbore screw alloy b18.2.1 | 52 |
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| Bostwick | IN | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 1/2 | 1/2-13 x 3 1/2 12 pt. counterbore screw alloy b18.2.1 | 14 |
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| THRDFAST | FL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/4 | 12 pt counterbore screw b18.2.1 | 1 |
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| THRDFAST | AL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 1/2 | 12 pt counterbore screw b18.2.1 | 266 |
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| THRDFAST | OK | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/4 | 12 pt counterbore screw b18.2.1 | 44 |
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| THRDFAST | OK | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 3/4 | 12 pt counterbore screw b18.2.1 | 81 |
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| THRDFAST | AL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 | 12 pt counterbore screw b18.2.1 | 198 |
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| THRDFAST | OK | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/2 | 12 pt counterbore screw b18.2.1 | 310 |
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| THRDFAST | AL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/2 | 12 pt counterbore screw b18.2.1 | 19 |
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| WSB | KY | 12 Point Flange Screw (CounterBore) | Steel | Phosphate | 1/2-13 x 6 | q/screw 12pt flange all (po) 1/2-13x6 b18.2.1 | 320 |
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| WSB | KY | 12 Point Flange Screw (CounterBore) | Steel | Phosphate | 1/2-13 x 1 1/4 | q/screw 12pt flange all (po) 1/2-13x1 1/4 b18.2.1 | 865 |
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| WSB | KY | 12 Point Flange Screw (CounterBore) | Steel | Phosphate | 1/2-13 x 2 1/4 | q/screw 12pt flange all (po) 1/2-13x2 1/4 b18.2.1 | 4,600 |
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| All Size | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-20 x 1 | 1/2-20 x 1 12 point flange bolt alloy plain b18.2.1 | 30 |
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| All Size | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 | 1/2-13 x 2 12 point flange bolt plain b18.2.1 | 33 |
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