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3 1/4 inch length Socket Cap Screws (ASME B18. 3)
Socket Head Cap Screws are typically used in machine parts, die fixturing, and clamping. Socket head cap screws have a flat faced, circular raised head with an indented hex socket. They can be fully or part threaded, are usually manufactured from high grade alloy steel. Dimensionally, metric socket head cap screws are covered by the relevant DIN, ISO or JIS standards, but US/Imperial socket head cap screws are covered by the ASME B18.2.1 and B18.3 specifications.
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| Search Results Sponsored by Parker Fasteners, your source for Socket Head Cap Screws. For more results, visit www.parkerfasteners.com | ||||||||
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| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| Buy Socket Cap Screws from one of our FCH Network Members | ||||||||
| GLF | OH | Socket Head Cap Screw | Steel | Plain | 1/2-13 x 3 1/4 | 1/2-13x3-1/4 shcs stl pln b18.2.1 b18.3 () () () | 230 |
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| GLF | OH | Socket Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-20 x 3 1/4 | 1/4-20x3-1/4 shcs 18-8 s/s b18.2.1 b18.3 () () () | 114 |
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| GLF | OH | Socket Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 3 1/4 | 5/16-18x3-1/4 shcs 18-8 s/s b18.2.1 b18.3 () () () | 29 |
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| GLF | OH | Socket Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 x 3 1/4 | 3/8-16x3-1/4 shcs 18-8 s/s b18.2.1 b18.3 () () () | 40 |
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| GLF | OH | Socket Head Cap Screw | Steel | Plain | 1/4-20 x 3 1/4 | 1/4-20x3-1/4 shcs stl pln b18.2.1 b18.3 () () () | 467 |
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| GLF | OH | Socket Head Cap Screw | Steel | Plain | #10-32 x 3 1/4 | #10-32x3-1/4 shcs stl pln b18.2.1 b18.3 () () () | 904 |
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| Ababa | CA | Socket Head Cap Screw | Steel | Plain | 1/4-20 x 3 1/4 | 1/4-20 x 3 1/4 soc cap screw alloy b18.2.1 b18.3 | 110 |
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| Ababa | CA | Socket Head Cap Screw | Steel | Plain | 5/16-18 x 3 1/4 | 5/16-18 x 3 1/4 soc cap screw alloy b18.2.1 b18.3 | 24 |
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| Ababa | CA | Socket Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 x 3 1/4 | 3/8-16 x 3 1/4 soc cap screw s/s b18.2.1 b18.3 | 36 |
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| Ababa | CA | Socket Head Cap Screw | Steel | Plain | 3/8-16 x 3 1/4 | 3/8-16 x 3 1/4 soc cap screw alloy b18.2.1 b18.3 | 152 |
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| Ababa | CA | Socket Head Cap Screw | Steel | Plain | 3/8-24 x 3 1/4 | 3/8-24 x 3 1/4 soc cap screw alloy b18.2.1 b18.3 | 5 |
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| Ababa | CA | Socket Head Cap Screw | Steel | Plain | 1/2-13 x 3 1/4 | 1/2-13 x 3 1/4 soc cap screw alloy b18.2.1 b18.3 | 65 |
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| Ababa | CA | Socket Head Cap Screw | Steel | Plain | 5/8-11 x 3 1/4 | 5/8-11 x 3 1/4 soc cap screw alloy b18.2.1 b18.3 | 35 |
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| Ababa | CA | Socket Head Cap Screw | Steel | Plain | 3/4-10 x 3 1/4 | 3/4-10 x 3 1/4 soc cap screw alloy b18.2.1 b18.3 | 20 |
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| Ababa | CA | Socket Head Cap Screw | Steel | Plain | 1/2-20 x 3 1/4 | 1/2-20 x 3 1/4 soc cap screw alloy b18.2.1 b18.3 | 15 |
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| Ababa | CA | Socket Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 3 1/4 | 5/16-18 x 3 1/4 soc cap screw s/s b18.2.1 b18.3 | 50 |
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| Irwin Ind | Ont | Socket Head Cap Screw | Steel | Zinc/Clear | 1/2-13 x 3 1/4 | 1/2-13 x 3 1/4 unc soc hd caps zinc dich fe/zn .0003 min b18.2.1 b18.3 | 50 |
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| ASMC | IL | Socket Head Cap Screw | Steel | Plain | #10-32 x 3 1/4 | (pt) fine socket hd c/s b18.2.1 b18.3 | 50 |
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| ASMC | IL | Socket Head Cap Screw | Steel | Plain | 3/8-16 x 3 1/4 | 3/8-16x3 1/4 (pt) coarse socket hd cap screw nylon patch alloy pln b18.2.1 b18.3 | 25 |
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| Ababa | CA | Socket Head Cap Screw | Steel | Plain | 1/4-20 x 3 1/4 | 1/4-20 x 3 1/4 soc cap screw alloy b18.2.1 b18.3 | 50 |
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| Ababa | CA | Socket Head Cap Screw | Steel | Plain | 3/8-16 x 3 1/4 | 3/8-16 x 3 1/4 soc cap screw alloy b18.2.1 b18.3 | 50 |
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| Ababa | CA | Socket Head Cap Screw | Steel | Plain | 1/2-13 x 3 1/4 | 1/2-13 x 3 1/4 soc cap screw alloy b18.2.1 b18.3 | 45 |
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| Field Fas | IL | Socket Head Cap Screw | Steel | Plain | #8-32 x 3 1/4 | 8-32x3 1/4 soc cap alloy stl thermal blk ox manufactured to asme b18.3 and astm a574 | 1,000 |
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| MFS | KS | Socket Head Cap Screw | Steel | Plain | 1/2-20 x 3 1/4 | alloy b18.3 | 1 |
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| MFS | KS | Socket Head Cap Screw | Steel | Zinc/Yellow | 1/2-13 x 3 1/4 | b18.3 | 15 |
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| MFS | KS | Socket Head Cap Screw | Steel | Plain | 1/2-13 x 3 1/4 | alloy b18.3 | 115 |
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| XL Screw | GA | Socket Head Cap Screw | ASTM A574 | Plain | 1/4-20 x 3 1/4 | socket c/s h t astm a574 ansi/asme b18.3 3a | 700 |
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| XL Screw | GA | Socket Head Cap Screw | ASTM A574 | Plain | 5/16-18 x 3 1/4 | socket c/s h t astm a574 ansi/asme b18.3 3a | 500 |
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| XL Screw | GA | Socket Head Cap Screw | ASTM A574 | Plain | 3/8-16 x 3 1/4 | socket c/s h t astm a574 ansi/asme b18.3 3a | 350 |
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| XL Screw | GA | Socket Head Cap Screw | ASTM A574 | Plain | 1/2-13 x 3 1/4 | socket c/s h t astm a574 ansi/asme b18.3 3a | 180 |
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| XL Screw | GA | Socket Head Cap Screw | ASTM A574 | Plain | 5/8-11 x 3 1/4 | socket c/s h t astm a574 ansi/asme b18.3 3a | 120 |
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| XL Screw | GA | Socket Head Cap Screw | ASTM A574 | Plain | 3/4-10 x 3 1/4 | socket c/s h t astm a574 ansi/asme b18.3 3a | 70 |
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| Exim | S'pore | Socket Head Cap Screw | Steel | Black Oxide | #10-32 x 3 1/4 | screw socket head cap hexsteel black oxide#10-32 x 3-1/4 in b18.2.1 b18.3 | 355 |
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| Standard | MA | Socket Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-20 x 3 1/4 | 1/4-20x3-1/4 socket cap screw 18-8 stainless steel b18.2.1 b18.3 | 4270 |
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| Standard | MA | Socket Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3 1/4 | 1/4-28x3-1/4 socket cap screw 18-8 stainless steel b18.2.1 b18.3 | 1592 |
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| Standard | MA | Socket Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 x 3 1/4 | 3/8-16x3-1/4 socket cap screw 18-8 stainless steel b18.2.1 b18.3 | 5328 |
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| QFC | TX | Socket Head Cap Screw | Steel | Plain | 3/8-16 x 3 1/4 | 3/8-16x3 1/4 soc c/s alloy plain b18.2.1 b18.3 | 30 |
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| QFC | TX | Socket Head Cap Screw | Steel | Plain | 3/4 x 3 1/4 | 3/4x3 1/4nc skt cap screw b18.2.1 b18.3 | 50 |
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| QFC | TX | Socket Head Cap Screw | Steel | Galvanized | 3/4 x 3 1/4 | 3/4x3-1/4 socket head cap screw galvanized b18.2.1 b18.3 | 14 |
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| B & K FAST | PA | Socket Head Cap Screw | Steel | Plain | #10-24 x 3 1/4 | 10/24 x 3 1/4 socket cap screws b18.2.1 b18.3 | 80 |
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| B & K FAST | PA | Socket Head Cap Screw | Steel | Plain | 5/16-18 x 3 1/4 | 5/16-18 x 3 1/4 socket cap screws b18.2.1 b18.3 | 434 |
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| B & K FAST | PA | Socket Head Cap Screw | Steel | Zinc/Clear | 5/16-18 x 3 1/4 | 5/16-18 x 3 1/4 socket cap screws zinc b18.2.1 b18.3 | 107 |
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| B & K FAST | PA | Socket Head Cap Screw | Steel | Plain | 1 1/4-7 x 3 1/4 | 1 1/4-7 x 3 1/4 socket cap screws b18.2.1 b18.3 | 2 |
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| OSSCO | RI | Socket Head Cap Screw | Steel | Plain | #10-24 x 3 1/4 | 10-24x3 1/4 socket cap screw b18.2.1 b18.3 | 2 |
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| OSSCO | RI | Socket Head Cap Screw | Steel | Plain | 5/16-18 x 3 1/4 | 5/16-18x3 1/4 socket cap screw blue devil b18.2.1 b18.3 | 50 |
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| OSSCO | RI | Socket Head Cap Screw | Steel | Plain | 3/4-10 x 3 1/4 | 3/4-10x3 1/4 socket cap screw blue devil b18.2.1 b18.3 | 25 |
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| OSSCO | RI | Socket Head Cap Screw | Steel | Plain | 7/16-14 x 3 1/4 | 7/16-14x3 1/4 socket cap screw blue devil b18.2.1 b18.3 | 40 |
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| QFC | TX | Socket Head Cap Screw | Steel | Plain | 1/4 x 3 1/4 | 1/4x3 1/4 nc socket hd c/s b18.2.1 b18.3 | 34 |
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| QFC | TX | Socket Head Cap Screw | Steel | Plain | 3/8 x 3 1/4 | 3/8x3 1/4nc socket hd cap dom. b18.2.1 b18.3 | 50 |
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| QFC | TX | Socket Head Cap Screw | Steel | Zinc/Clear | 3/8 x 3 1/4 | 3/8 x 3-1/4 socket head cap screw zinc b18.2.1 b18.3 | 299 |
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| Bostwick | IN | Socket Head Cap Screw | Steel | Plain | 1/4-20 x 3 1/4 | 1/4-20 x 3 1/4 socket cap screw (usa mfg) alloy b18.2.1 b18.3 | 239 |
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| Bostwick | IN | Socket Head Cap Screw | Steel | Plain | 1-8 x 3 1/4 | 1-8 x 3 1/4 socket cap screw alloy b18.2.1 b18.3 | 34 |
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| Bostwick | IN | Socket Head Cap Screw | Steel | Plain | 3/4-10 x 3 1/4 | 3/4-10 x 3 1/4 socket cap screw (usa mfg) alloy b18.2.1 b18.3 | 80 |
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| Bostwick | IN | Socket Head Cap Screw | Steel | Plain | 1/2-13 x 3 1/4 | 1/2-13 x 3 1/4 socket cap screw (usa mfg) alloy b18.2.1 b18.3 | 51 |
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| Bostwick | IN | Socket Head Cap Screw | Steel | Plain | 5/8-11 x 3 1/4 | 5/8-11 x 3 1/4 socket cap screw (usa mfg) alloy b18.2.1 b18.3 | 33 |
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| Bostwick | IN | Socket Head Cap Screw | Steel | Plain | 1-14 x 3 1/4 | 1-14 x 3 1/4 socket cap screw alloy b18.2.1 b18.3 | 2 |
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| Bostwick | IN | Socket Head Cap Screw | Steel | Plain | 7/8-9 x 3 1/4 | 7/8-9 x 3 1/4 socket cap screw (usa mfg) alloy b18.2.1 b18.3 | 5 |
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| Bostwick | IN | Socket Head Cap Screw | Steel | Plain | 7/8-9 x 3 1/4 | 7/8-9 x 3 1/4 socket cap screw alloy b18.2.1 b18.3 | 4 |
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| JET FITTING | CA | Socket Head Cap Screw | Steel | Plain | 1/4-20 x 3 1/4 | cap screw socket 1/420x3-1/4 alloy steel b18.2.1 b18.3 | 100 |
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| NWFAST | TX | Socket Head Cap Screw | Steel | Black Oxide | 5/8-11 x 3 1/4 | 5/8-11 x 3 1/4 socket head cap screw alloy steel black oxide b18.2.1 b18.3 | 2020 |
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| NWFAST | TX | Socket Head Cap Screw | Steel | Black Oxide | 1-14 x 3 1/4 | 1-14 x 3 1/4 socket head cap screw alloy steel black oxide b18.2.1 b18.3 | 277 |
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| THRDFAST | FL | Socket Head Cap Screw | Steel | Plain | 5/16-18 x 3 1/4 | socket c/s b18.2.1 b18.3 | 44 |
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| THRDFAST | FL | Socket Head Cap Screw | Steel | Plain | 3/4-10 x 3 1/4 | socket c/s b18.2.1 b18.3 | 19 |
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| THRDFAST | FL | Socket Head Cap Screw | Steel | Plain | 1/2-13 x 3 1/4 | socket c/s b18.2.1 b18.3 | 10 |
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| THRDFAST | FL | Socket Head Cap Screw | Steel | Plain | 3/8-16 x 3 1/4 | socket c/s b18.2.1 b18.3 | 10 |
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| THRDFAST | FL | Socket Head Cap Screw | Steel | Plain | 7/8-9 x 3 1/4 | socket c/s b18.2.1 b18.3 | 37 |
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| THRDFAST | TN | Socket Head Cap Screw | Steel | Plain | 5/16-18 x 3 1/4 | socket c/s b18.2.1 b18.3 | 60 |
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| THRDFAST | AL | Socket Head Cap Screw | Steel | Plain | 3/4-10 x 3 1/4 | socket c/s b18.2.1 b18.3 | 92 |
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| THRDFAST | OK | Socket Head Cap Screw | Steel | Plain | 3/4-10 x 3 1/4 | socket c/s b18.2.1 b18.3 | 15 |
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| THRDFAST | MS | Socket Head Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 x 3 1/4 | 18-8 ss socket c/s b18.2.1 b18.3 | 2 |
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| THRDFAST | OK | Socket Head Cap Screw | Steel | Plain | 7/8-9 x 3 1/4 | socket c/s b18.2.1 b18.3 | 4 |
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| THRDFAST | AL | Socket Head Cap Screw | Steel | Plain | #10-24 x 3 1/4 | socket c/s b18.2.1 b18.3 | 75 |
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| THRDFAST | AL | Socket Head Cap Screw | Steel | Plain | 5/8-11 x 3 1/4 | socket c/s b18.2.1 b18.3 | 4 |
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| THRDFAST | AL | Socket Head Cap Screw | Steel | Plain | 1-8 x 3 1/4 | socket c/s b18.2.1 b18.3 | 2 |
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| THRDFAST | AL | Socket Head Cap Screw | Steel | Plain | 1/4-20 x 3 1/4 | socket c/s b18.2.1 b18.3 | 66 |
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| WSB | KY | Socket Head Cap Screw | Grade B7M | Zinc/Yellow | q/ cap screw hex soc b7m (zy) 5/8-11x3 1/4 b18.2.1 b18.3 | 6 |
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| WSB | KY | Socket Head Cap Screw | Steel | Plain | q/ cap screw soc gr660 grpthd 3/4-10x3 1/4 b18.2.1 b18.3 | 50 |
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| All Size | TX | Socket Head Cap Screw | Steel | Plain | 5/8-11 x 3 1/4 | 5/8-11 x 3 1/4 socket head cap screw b18.2.1 b18.3 | 45 |
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| All Size | TX | Socket Head Cap Screw | Steel | Plain | 7/8-9 x 3 1/4 | 7/8-9 x 3 1/4 socket head cap screw b18.2.1 b18.3 | 25 |
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| All Size | TX | Socket Head Cap Screw | Steel | Plain | 5/8-18 x 3 1/4 | 5/8-18 x3-1/4 socket cap screw b18.2.1 b18.3 | 20 |
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