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Counterbore Screws, Superalloy (Inconel, Hastelloy, Alloy 20)
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
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| 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 | ||||||||
| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 5/16-18 x 3/4 | 5/16-18x3/4 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 306,000 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 3/8-24 x 2 | 3/8-24x2 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 49,000 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 5/8-18 x 8 1/4 | 5/8-18x8-1/4 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 1,000 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 5/8-18 x 6 3/4 | 5/8-18x6-3/4 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 15,000 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | MS9557-12 b18.2.1 () () () | 10,000 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 1/2-13 x 3 1/4 | 1/2-13 x 3-1/4 12-pt flange bolt 17-4 ph s/s | 100,000 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 5/8-11 x 2 | 5/8-11 x 2 12-pt flange bolt 17-4 ph s/s | 72,000 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 1/2-13 x 3 1/2 | 1/2-13 x 3-1/2 12-pt flange bolt 17-4 ph s/s | 65,000 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-32 | 2632 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-14 | 3833 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-12 | 11851 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9558-13 | 1795 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9554-04 () | 2420 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-09 | 1127 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-14 | 1246 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-10 | 25633 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-13 | 10826 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-07 | 1400 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-09 | 1406 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-22 | 1355 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9558-20 | 1414 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9555-08 | 27 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-08 | 14350 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-08 bolt machine | 3136 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9558-30 | 943 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-13 | 576 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-07 | 675 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-20 | 980 |
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| Optimas | IL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 3/8-24 x 2 1/2 | 3/8-24x2-1/2 12-point counterbore screw astm a286 per drawing ppap | 4212 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9558-21 | 50 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9558-18 | 50 |
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| Century | NY | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-08 | 13350 |
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| Century | NY | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-08 bolt machine | 1924 |
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| Century | NY | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | screw dbl hex machine ms9555-05 | 200 |
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| Century | NY | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-10 | 9732 |
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| Century | NY | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-12 | 16952 |
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| Rapid | NY | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | MS21279-17 | 11 |
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| Parker | AZ | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Passivated | 7/16 -20 X 1.116 12 PT. FLANGE SCREW - IFI-115 0.741 THREAD A286 HARDENED PASSIVATE PER NASM21250-07-006 EXCEPT MATERIAL made in u.s.a. | 190 |
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| Parker | AZ | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Passivated | 7/16 -20 X 1.116 12 PT. FLANGE SCREW - IFI-115 0.741 THREAD A286 HARDENED PASSIVATE PER NASM21250-07-006 EXCEPT MATERIAL made in u.s.a. | 190 |
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| System 22 | PA | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 1/2-20 x 3 | inconel 718 | 11 |
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| System 22 | PA | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Silver Plated | 5/8-18 x 1 1/2 | inconel 718 | 15 |
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| System 22 | PA | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 1/2 x 2 1/2 | inconel 718 | 50 |
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| System 22 | PA | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Silver Plated | 1/2-20 x 2 1/2 | inconel 718 | 30 |
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| System 22 | PA | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 1/2-13 x 3 | inconel 718 | 30 |
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| System 22 | PA | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 1/2 x 3 | inconel 718 | 30 |
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| AIH | AZ | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | double hex bolt inconel | 3402 |
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