5/8-18 Counterbore Screws
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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Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 1 | fine 12-point fl/b | 134 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 1 1/4 | 5/8-18x1 1/4 fine 12-point flange screw alloy pln | 5 |
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Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 1 1/4 | nf 12 pt fl/b pl | 3 |
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Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 1 1/4 | 12 pt countr-bor 5/8-18x1 1/4 (FINE THREAD) | 140 |
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Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 1 1/2 | 5/8-18 x 1 1/2 12 point cap screw alloy b18.2.1 | 25 |
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Weaver | WA | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 5/8-18 x 1 1/2 | 5/8-18x1 1/2 gr8 12pt hd flange bolt plain | 25 |
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Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 1 1/2 | nf 12 pt fl/b pl | 14 |
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Liberty | IL | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 5/8-18 x 1 1/2 | 12-pt c/s | 100 |
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System 22 | PA | 12 Point Flange Screw (CounterBore) | Superalloy (Inconel, Hastelloy, Alloy 20) | Silver | 5/8-18 x 1 1/2 | inconel 718 | 15 |
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Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 1 3/4 | nf ferry c/s | 63 |
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Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 1 3/4 | 12 pt countr-bor plain 5/8-18 x 1 3/4 (FINE THREAD) | 50 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 1 3/4 | 5/8-18x1 3/4 fine 12-point flange screw alloy pln | 30 |
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General F | MI | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 1 3/4 | 5/8-18 x 1.75 counterbore scr q-29 b18.2.1 | 273 |
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Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 2 | nf ferry c/s | 6 |
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Weaver | WA | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 5/8-18 x 2 | 5/8-18x2 gr8 12pt hd flange bolt plain | 5 |
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B & K FAST | PA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 2 | 5/8-18 x 2 12 pt flange bolts b18.2.1 | 17 |
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Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 2 | nf 12 pt fl/b pl | 3 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 2 1/4 | 5/8-18x2 1/4 fine 12-point flange screw alloy pln b18.2.1 | 69 |
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Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 2 1/2 | 5/8-18 x 2 1/2 12 point cap screw alloy b18.2.1 | 15 |
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Weaver | WA | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 5/8-18 x 2 1/2 | 5/8-18x2 1/2 gr8 12pt hd flange bolt plain | 5 |
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B & K FAST | PA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 2 1/2 | 5/8-18 x 2 1/2 12 pt flange bolts b18.2.1 | 28 |
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Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 2 1/2 | 12 pt countr-bor plain 5/8-18 x 2 1/2 (FINE THREAD) | 50 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 2 1/2 | 5/8-18x2 1/2 fine 12-point flange screw alloy pln | 20 |
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JET Indus | WI | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 2 1/2 | 12pt. flange bolt 5/8-18x2-1/2 plain | 150 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 2 3/4 | 5/8-18x2 3/4 fine 12-point flange screw alloy pln b18.2.1 | 5 |
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Weaver | WA | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 5/8-18 x 3 | 5/8-18x3 gr8 12pt hd flange bolt plain | 25 |
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Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 3 | nf 12 pt fl/b pl | 16 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 3 | fine 12-point fl/b | 37 |
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Hayes | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 3 | 5/8-18 x 3 12 pt. ctrbr screw alloy | 6 |
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MidStates | MI | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 3 1/4 | 12pt fl/b sc-cntrbore | 113 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 3 1/4 | 5/8-18x3 1/4 fine 12-point flange screw alloy pln | 17 |
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Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 3 1/2 | 5/8-18 x 3 1/2 12 point cap screw alloy b18.2.1 | 65 |
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Weaver | WA | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 5/8-18 x 3 1/2 | 5/8-18x3 1/2 gr8 12pt hd flange bolt plain | 24 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 3 1/2 | 5/8-18x3 1/2 fine 12-point flange screw alloy pln b18.2.1 | 10 |
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Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 3 1/2 | nf 12 pt fl/b pl | 1 |
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General F | MI | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 3 1/2 | 5/8-18x3.5 ctbr scr q-29 patch roc std b-104p 5-18-95 | 1,000 |
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Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 4 | 5/8-18 x 4 12 point cap screw alloy b18.2.1 | 25 |
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Weaver | WA | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 5/8-18 x 4 | 5/8-18x4 gr8 12pt hd flange bolt plain | 25 |
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Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 4 | nf 12 pt fl/b pl | 3 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 4 | fine 12-point fl/b | 5 |
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Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 4 1/2 | nf 12 pt fl/b pl | 19 |
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All Size | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 4 1/2 | 5/8-18 x 4-1/2 12 point flange bolt plain b18.2.1 | 1 |
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Hayes | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 4 1/2 | 5/8-18 x 4 1/2 12 pt. ctrbr screw alloy | 21 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 4 1/2 | fine 12-point fl/b b18.2.1 | 20 |
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Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 5 | 5/8-18 x 5 12 point cap screw alloy b18.2.1 | 1 |
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JET Indus | WI | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 5 | 12pt. flange bolt 5/8-18x5 plain | 19 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 5 | 5/8-18x5 fine 12-point flange screw alloy pln b18.2.1 | 14 |
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Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 5 3/4 | nf ferry c/s | 4 |
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Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 6 | nf ferry c/s | 4 |
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Ababa | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 6 1/2 | 5/8-18 x 6 1/2 inch 12 point cap screw alloy b18.2.1 | 1 |
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Future Fastener | TX | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 5/8-18 x 6 1/2 | 5/8-18 x 6 1/2 ferry head cap screw blk | 50 |
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ASMC | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 6 1/2 | fine 12-point fl/b | 30 |
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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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Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 x 7 | nf 12 pt fl/b pl | 7 |
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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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CIF | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 | 5/8-18 unjf 3ax4.900 12 point flange bolt 4340 alloy heat treat per 1e0106a (step 2) (3930) () | 3930 |
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CIF | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 5/8-18 | 5/8-18 unjf 3ax4.900 12 point flange bolt 4340 alloy blank no heat treat(step 1) (30) () | 30 |
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CIF | IL | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 5/8-18 | 5/8-18 unjf 3ax4.900 12 point flange bolt 4340 alloy heat treat per 1e0106 and marked per print 1p-1758 black oxide (final) (14) () | 14 |
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