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1/2-13 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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| 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 | |
| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 2 1/2 | 12 pt flange screw alloy | 100 |
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| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 2 1/4 | 12 pt flange screw alloy | 100 |
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| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 1 3/4 | 12 pt flange screw alloy | 3,597 |
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| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 1 1/4 | 12 pt flange screw alloy | 100 |
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| Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3/4 | 12 pt countr-bor plain 1/2-13 x 3/4 | 64 |
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| Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 | nc ferry c/s | 50 |
|
| 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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| Weaver | WA | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 1/2-13 x 1 | 1/2-13x1 gr8 12pt hd flange bolt plain | 125 |
|
| Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 | nc 12 pt fl/b pl | 113 |
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| Endries | WI | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 | 1/2-13x1 alloy stl 170 000 psi 12 point flange screw plain | 150 |
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| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 1 | 12 pt flange screw alloy | 100 |
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| UltraFast | WA | 12 Point Flange Screw (CounterBore) | Steel | Zinc/Clear | 1/2-13 x 1 | double hex tork zn | inquire |
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| Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/4 | nc ferry c/s | 50 |
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| Weaver | WA | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 1/2-13 x 1 1/4 | 1/2-13x1 1/4 gr8 12pt hd flange bolt plain | 125 |
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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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| YANKEE | NH | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1.25 | -12-pt flange high strength screw | 72 |
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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 |
|
| Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/4 | 12 pt countr-bor plain 1/2-13 x 1 1/4 | 250 |
|
| 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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| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 1 1/4 | 12 pt flange screw alloy | 100 |
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| Liberty | IL | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 1/2-13 x 1 1/4 | 12-pt hex c/s grade8 grade8 | 350 |
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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 |
|
| Hodell | OH | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/4 | 1/2-13x1 1/4 12pt 170m psi counterbore | 3000 |
|
| Fastener | OH | 12 Point Flange Screw (CounterBore) | ASTM A320 L7, L7M | Zinc/Yellow | 1/2-13 x 1 1/4 | 12 point cap screw 1/2-13x1-1/4 a320 l7 zinc yellow | 8 |
|
| Hodell | OH | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/4 | 1/2-13x1 1/4 12pt 170m psi counterbore | 3000 |
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| Hodell | OH | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/4 | 1/2-13x1 1/4 12pt 170m psi counterbore | 3000 |
|
| 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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| Weaver | WA | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 1/2-13 x 1 1/2 | 1/2-13x1 1/2 gr8 12pt hd flange bolt plain | 196 |
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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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| Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/2 | nc ferry c/s | 11 |
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| Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/2 | 12 pt countr-bor plain 1/2-13 x 1 1/2 | 50 |
|
| Delta | TX | 12 Point Flange Screw (CounterBore) | Grade B7 | Plain | 1/2-13 x 1 1/2 | 12 pt cntr-bor b7 grn 1/2-13 x 1 1/2 (XYLAN 1425 GREEN) | 100 |
|
| Wurth | IN | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/2 | 1/2-13 x 1-1/2 countr-bor screw alloy | 28,027 |
|
| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 1 1/2 | 12 pt flange screw alloy | 100 |
|
| Delta | TX | 12 Point Flange Screw (CounterBore) | Grade B7 | Plain | 1/2-13 x 1 1/2 | 12 pt countr-bor b7 blue 1/2-13x1 1/2 (XYLAN 1425 BLUE) | 52 |
|
| THRDFAST | OK | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/2 | 12 pt counterbore screw b18.2.1 | 310 |
|
| THRDFAST | AL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 1/2 | 12 pt counterbore screw b18.2.1 | 19 |
|
| WDMB | IA | 12 Point Flange Screw (CounterBore) | Steel | Zinc/Clear | 1/2-13 x 1 3/4 | scr 12pt flange st (zn) 1/2-13x1 3/4 (W050) | 836 |
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| Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 3/4 | nc 12 pt fl/b pl | 65 |
|
| Cascade | OR | 12 Point Flange Screw (CounterBore) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 3/4 | 18-8ss | 1000 |
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| Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 3/4 | nc ferry c/s | 182 |
|
| Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 3/4 | 12 pt countr-bor plain 1/2-13 x 1 3/4 | 152 |
|
| Delta | TX | 12 Point Flange Screw (CounterBore) | Grade B7 | Plain | 1/2-13 x 1 3/4 | 12 pt cntr-bor b7 blue 1/2-13 x 1 3/4 (XYLAN BLUE 1425) | 130 |
|
| ISSCO | MO | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 3/4 | 12 point counterbore screw | 300 |
|
| Wurth | IN | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 3/4 | 1/2-13 x 1-3/4 countr-bor screw alloy | 36,596 |
|
| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 1 3/4 | 12 pt flange screw alloy | 3,597 |
|
| Wurth Ind | D.F. | 12 Point Flange Screw (CounterBore) | Steel | Zinc/Yellow | 1/2-13 x 1 3/4 | 1/2-13 x 1 3/4 12 pt. counterbore screw yz | 398 |
|
| THRDFAST | OK | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 1 3/4 | 12 pt counterbore screw b18.2.1 | 81 |
|
| 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 |
|
| Weaver | WA | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 1/2-13 x 2 | 1/2-13x2 gr8 12pt hd flange bolt plain | 150 |
|
| NAPPCO | TX | 12 Point Flange Screw (CounterBore) | Grade B7 | Plain | 1/2-13 x 2 | 1/2-13x2 a193 b7 ext flange c/s 12pt | 50 |
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| Cal Fastenrs | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 | 12-pt fl/b - 12-pt fl/b | 100 |
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| Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 | ferry c/s | 41 |
|
| Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 | 12 pt countr-bor plain 1/2-13 x 2 | 90 |
|
| Delta | TX | 12 Point Flange Screw (CounterBore) | Grade B7 | Plain | 1/2-13 x 2 | 12 pt cntr-bor b7 grn 1/2-13 x 2 (XYLAN 1425 GREEN) | 84 |
|
| 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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| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 2 | 12 pt flange screw alloy | 100 |
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| IPC | VA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 | 1/2-13x2 12 pt. flange screw | 1,220 |
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| Fastener | OH | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 | 12 point flange screw 1/2-13x2 alloy steel plain | 15 |
|
| Delta | TX | 12 Point Flange Screw (CounterBore) | Grade B7 | Plain | 1/2-13 x 2 1/4 | 12 pt countr-bor a193-b7 1/2-13 x 2 1/4 | 50 |
|
| Delta | TX | 12 Point Flange Screw (CounterBore) | Grade B7 | Plain | 1/2-13 x 2 1/4 | 12 pt cntr-bor b7 grn 1/2-13 x 2 1/4 (XYLAN 1425 GREEN) | 63 |
|
| WDMB | IA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 1/4 | screw 12pt flange alloy (pl) 1/2-13x2 1/4 (W020) (W020) (W020) | 7,970 |
|
| 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 |
|
| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 2 1/4 | 12 pt flange screw alloy | 100 |
|
| Weaver | WA | 12 Point Flange Screw (CounterBore) | Grade 8 | Plain | 1/2-13 x 2 1/2 | 1/2-13x2 1/2 gr8 12pt hd flange bolt plain | 100 |
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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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| Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 1/2 | nc 12 pt fl/b pl | 39 |
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| Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 1/2 | 12 pt countr-bor plain 1/2-13 x 2 1/2 | 130 |
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| Delta | TX | 12 Point Flange Screw (CounterBore) | Grade B7 | Plain | 1/2-13 x 2 1/2 | 12-pt bolt a193-b7 y-z 1/2-13 x 2 1/2 | 60 |
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| ISSCO | MO | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 1/2 | 12 point counterbore screw | 134 |
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| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 2 1/2 | 12 pt flange screw alloy | 100 |
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| Revcar | VA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 1/2 | 12 pt cntrbore screw darling only- with material test reports | 650 |
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| WDMB | IA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 1/2 | scr 12pt flange alloy (pl) 1/2-13x2 1/2 (W000) (W000) (W000) | 1,121 |
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| Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 3/4 | nc ferry c/s | 8 |
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| Wurth | IN | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 2 3/4 | 1/2-13x2 3/4 counter-bor alloy pack 70 per poly bag | 3,995 |
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| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 2 3/4 | 12 pt flange screw alloy | 100 |
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| Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 | ferry c/s | 1 |
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| Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 | nc 12 pt fl/b pl | 24 |
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| Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 | 12 pt countr-bor plain 1/2-13 x 3 | 53 |
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| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 3 | 12 pt flange screw alloy | 2,930 |
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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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| Fastener | OH | 12 Point Flange Screw (CounterBore) | ASTM A320 L7, L7M | Zinc/Yellow | 1/2-13 x 3 | 12 point cap screw 1/2-13x3 a320 l7 zinc yellow | 16 |
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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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| MidStates | MI | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 1/4 | 12pt fl/b sc-cntrbore | 17 |
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| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 3 1/4 | 12 pt flange screw alloy | 100 |
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| Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 1/2 | nc 12 pt fl/b pl | 99 |
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| Endries | WI | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 1/2 | 1/2-13x3-1/2 alloy stl 170 000 psi 12 point flange screw plain | 160 |
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| Cal Fastenrs | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 1/2 | 12-pt fl/b | 100 |
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| Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 1/2 | ferry c/s | 9 |
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| Wurth | IN | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 3 1/2 | 1/2-13 x 3 1/2 countr-bor screw alloy | 580 |
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| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 3 1/2 | 12 pt flange screw alloy | 100 |
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| IPC | VA | 12 Point Flange Screw (CounterBore) | Steel | Zinc/Yellow | 1/2-13 x 3 1/2 | 1/2-13x3 1/2 12 pt. flange screw 150m t.s. steel zinc yellow must be baked and relieved immediately after plating. certs required | 4,421 |
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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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| 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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| OBRIEN | OH | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 4 | 12pt fl/b | 4 |
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| Wurth | IN | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 4 | 1/2-13x4 countr-bor alloy pack 60 per poly bag | 1,090 |
|
| MTP | CA | 12 Point Flange Screw (CounterBore) | Steel | Black Oxide | 1/2-13 x 4 | 12 pt flange screw alloy | 200 |
|
| Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 4 1/2 | 1/2-13x4-1/2 ferry c/s | 23 |
|
| Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 4 1/2 | 12 pt countr-bor plain 1/2-13 x 4 1/2 | 71 |
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| ISSCO | MO | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 4 1/2 | 12 point counterbore screw | 472 |
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| Jackson | MS | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 5 | ferry c/s | 5 |
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| ISSCO | MO | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 5 | 12 point counterbore screw | 50 |
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| Optimas | IL | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 5 | 1/2-13x5 12-point counterbore screw alloy per drawing ppap | 2800 |
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| Valley Nu | WA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 5 1/2 | nc 12 pt fl/b pl | 5 |
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| Delta | TX | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 6 | 12 pt countr-bor plain 1/2-13 x 6 | 88 |
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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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| Wurth | IN | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 6 | 1/2-13 x 6 countr-bor alloy pack 25 per poly bag | 150 |
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| Hayes | CA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 6 | 1/2-13 x 6 12 pt. ctrbr screw alloy | 15 |
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| MidStates | MI | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 7 | 12pt fl/b sc-cntrbore | 8 |
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| WDMB | IA | 12 Point Flange Screw (CounterBore) | Steel | Plain | 1/2-13 x 7 | scr 12pt flange alloy (pl) 1/2-13x7 (W0I0) | 182 |
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