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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 | ||||||||
| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-14 | 4246 |
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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 | ms9557-12 | 24140 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-10 | 1229 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9558-13 | 4795 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9554-04 () | 554 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-09 | 1027 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-32 | 3132 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-14 | 3893 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-10 | 30633 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9558-30 | 2318 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | #10-32 x 1/2 | ms9556-06 | 2598 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-13 | 2120 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | #10-32 x .438 | ms9556-05 | 108 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-07 | 2665 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | screw dbl hex machine ms9555-05 | 800 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-09 | 6 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-18 () () | 2870 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9557-22 | 456 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9556-13 | 576 |
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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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| 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 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 3/4-16 x 4 1/2 | 3/4-16x4-1/2 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 50 |
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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) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 7/8-14 x 3 1/4 | 7/8-14x3-1/4 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 100 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 3/8-24 x 2 1/2 | 3/8-24x2-1/2 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 150 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 3/8-24 x 2 1/4 | 3/8-24x2-1/4 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 50 |
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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 |
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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 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 3/8-16 x 2 | 3/8-16x2 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 50 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 7/8-9 x 3 3/4 | 7/8-9x3-3/4 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 100 |
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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 () () () | 16 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 1-14 x 3 1/2 | 1-14x3-1/2 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 2 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | MS9557-12 b18.2.1 () () () | 10 |
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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 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 9/16-18 x 4 3/4 | 9/16-18x4-3/4 12-pt flange bolt 17-4 ph s/s b18.2.1 () () () | 10 |
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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 | ms9555-06 | 500 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 3/4-10 x 3 1/4 | 3/4-10 x 3-1/4 12-pt flange bolt 17-4 ph s/s | 200 |
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| GLF | OH | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | MACHINE SCREW MIL-SPEC MS9554-06 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 1 3/4 | 1/2-13 x 1-3/4 12-pt flange bolt 17-4 ph s/s | 100 |
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| Century | FL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | ms9558-18 | 50 |
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| CIF | IL | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Passivated | 3/8-24 x 5/8 | 3/8-24x5/8 12 point flange screw 17-4 phillips ss cond h900 passivated per astm a967 per print (5) (5) (5) () | 5 |
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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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| 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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