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3 1/2 inch length Flat Head Cap Screws (ASME B18. 3)
Flat Head Socket Cap Screws are designed to be seated in countersunk holes, and align flush with the surface of the assembly when installed. Flat head socket cap screws have a flat top surface, an indented hex and a conical bearing surface with a head angle of 82°. Flat head socket cap screws are commonly used in machine parts, die fixturing, and clamping.
52 results, (click on any line for more information)
| Buy Flat Head Cap Screws from one of our FCH Network Members | ||||||||
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| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| Ababa | CA | Flat Head Socket Cap Screw | Steel | Plain | 1/4-20 x 3 1/2 | 1/4-20 x 3 1/2 flat soc cap screw alloy b18.2.1 b18.3 | 60 |
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| Ababa | CA | Flat Head Socket Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 x 3 1/2 | 3/8-16 x 3 1/2 flat soc cap screw s/s b18.2.1 b18.3 | 15 |
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| Ababa | CA | Flat Head Socket Cap Screw | Steel | Plain | 3/8-16 x 3 1/2 | 3/8-16 x 3 1/2 flat soc cap screw alloy b18.2.1 b18.3 | 190 |
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| Ababa | CA | Flat Head Socket Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 3 1/2 | 1/2-13 x 3 1/2 flat soc cap screw s/s b18.2.1 b18.3 | 90 |
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| Ababa | CA | Flat Head Socket Cap Screw | Steel | Plain | 1/2-13 x 3 1/2 | 1/2-13 x 3 1/2 flat soc cap screw alloy b18.2.1 b18.3 | 35 |
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| Ababa | CA | Flat Head Socket Cap Screw | Steel | Plain | 3/4-10 x 3 1/2 | 3/4-10 x 3 1/2 flat soc cap screw alloy b18.2.1 b18.3 | 11 |
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| Ababa | CA | Flat Head Socket Cap Screw | Steel | Plain | 5/8-11 x 3 1/2 | 5/8-11 x 3 1/2 flat soc cap screw alloy b18.2.1 b18.3 | 30 |
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| GLF | OH | Flat Head Socket Cap Screw | Steel | Plain | 1/2-13 x 3 1/2 | 1/2-13x3-1/2 flat stl pln b18.2.1 b18.3 () () () | 72 |
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| GLF | OH | Flat Head Socket Cap Screw | Steel | Plain | 1-8 x 3 1/2 | 1-8x3-1/2 flat stl pln b18.2.1 b18.3 () () () | 24 |
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| BHAM | AL | Flat Head Socket Cap Screw | Steel | Plain | 3/8-16 x 3 1/2 | 3/8-16x3 1/2 flat soc cap scr b18.2.1 b18.3 | 25 |
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| BHAM | AL | Flat Head Socket Cap Screw | Steel | Plain | 7/8-9 x 3 1/2 | 7/8-9x3 1/2 flat soc cap scr b18.2.1 b18.3 | 143 |
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| ASMC | IL | Flat Head Socket Cap Screw | Steel | Plain | 1/4-20 x 3 1/2 | (pt) coarse socket flat hd c/s b18.3 | 650 |
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| Ababa | CA | Flat Head Socket Cap Screw | Steel | Plain | 5/16-18 x 3 1/2 | 5/16-18 x 3 1/2 flat soc cap screw alloy b18.2.1 b18.3 | 106 |
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| Ababa | CA | Flat Head Socket Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 x 3 1/2 | 3/8-16 x 3 1/2 flat soc cap screw s/s b18.2.1 b18.3 | 15 |
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| Ababa | CA | Flat Head Socket Cap Screw | Steel | Plain | 3/8-16 x 3 1/2 | 3/8-16 x 3 1/2 flat soc cap screw alloy b18.2.1 b18.3 | 30 |
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| Ababa | CA | Flat Head Socket Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 3 1/2 | 1/2-13 x 3 1/2 flat soc cap screw s/s b18.2.1 b18.3 | 20 |
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| Infasco D | GA | Flat Head Socket Cap Screw | Steel | Plain | 5/8-11 x 3 1/2 | 5/8-11 x 3 1/2 s hex flat skt cntk b18.3 (alloy) unc n p | 3570 |
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| SII | IN | Flat Head Socket Cap Screw | Steel | Plain | 5/16-18 x 3 1/2 | 5/16-18 x 3-1/2 flat head socket cap screw) b18.2.1 b18.3 | 125 |
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| Infasco D | IL | Flat Head Socket Cap Screw | Steel | Plain | 1/2-13 x 3 1/2 | 1/2-13 x 3 1/2 s hex flat skt cntk b18.3 (alloy) unc n p | 875 |
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| Infasco D | TX | Flat Head Socket Cap Screw | Steel | Plain | 1/2-13 x 3 1/2 | 1/2-13 x 3 1/2 s hex flat skt cntk b18.3 (alloy) unc n p | 375 |
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| BIG BOLT | IL | Flat Head Socket Cap Screw | Steel | Plain | 7/8-9 x 3 1/2 | bolt & c/s hex c/s flat socket cntsnk b18.3 | 1900 |
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| Standard | MA | Flat Head Socket Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/4-10 x 3 1/2 | 3/4-10x3-1/2 flat head socket cap screw 18-8 stainless steel b18.2.1 b18.3 | 50 |
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| Standard | MA | Flat Head Socket Cap Screw | 316, 317, A4 Stainless | Plain | 1/2-13 x 3 1/2 | 1/2-13x3-1/2 flat head socket cap screw 316 stainless steel b18.2.1 b18.3 | 860 |
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| Standard | MA | Flat Head Socket Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 3 1/2 | 5/16-18x3-1/2 flat head socket cap screw 18-8 stainless steel b18.2.1 b18.3 | 645 |
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| QFC | TX | Flat Head Socket Cap Screw | Steel | Plain | 5/8-11 x 3 1/2 | 5/8-11x3 1/2 flat soc c/s plain b18.2.1 b18.3 | 47 |
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| B & K FAST | PA | Flat Head Socket Cap Screw | Steel | Plain | 1/4-20 x 3 1/2 | 1/4-20 x 3 1/2 flat hd socket cap screw b18.2.1 b18.3 | 178 |
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| B & K FAST | PA | Flat Head Socket Cap Screw | Steel | Plain | 5/16-18 x 3 1/2 | 5/16-18 x 3 1/2 flat hd socket cap screw b18.2.1 b18.3 | 297 |
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| B & K FAST | PA | Flat Head Socket Cap Screw | Steel | Plain | 3/8-16 x 3 1/2 | 3/8-16 x 3 1/2 flat hd socket cap screws b18.2.1 b18.3 | 160 |
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| B & K FAST | PA | Flat Head Socket Cap Screw | Steel | Plain | 1/2-13 x 3 1/2 | 1/2-13 x 3 1/2 flat hd socket cap screws b18.2.1 b18.3 | 100 |
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| B & K FAST | PA | Flat Head Socket Cap Screw | Steel | Plain | 5/8-11 x 3 1/2 | 5/8-11 x 3 1/2 flat hd socket cap screws b18.2.1 b18.3 | 177 |
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| B & K FAST | PA | Flat Head Socket Cap Screw | Steel | Plain | 5/8-18 x 3 1/2 | 5/8-18 x 3 1/2 flat hd socket cap screws b18.2.1 b18.3 | 5 |
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| B & K FAST | PA | Flat Head Socket Cap Screw | Steel | Plain | 3/4-10 x 3 1/2 | 3/4-10 x 3 1/2 flat hd socket cap screws b18.2.1 b18.3 | 96 |
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| B & K FAST | PA | Flat Head Socket Cap Screw | Steel | Plain | 7/8-9 x 3 1/2 | 7/8-9 x 3 1/2 flat hd socket cap screws b18.2.1 b18.3 | 4 |
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| B & K FAST | PA | Flat Head Socket Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-20 x 3 1/2 | 1/4-20 x 3 1/2 flat socket cap screws 18-8 ss b18.2.1 b18.3 | 30 |
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| Marine Fasteners | FL | Flat Head Socket Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/8-11 x 3 1/2 | 5/8-11x3-1/2 flat soc cs ss b18.2.1 b18.3 | 2390 |
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| Marine Fasteners | FL | Flat Head Socket Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/4-10 x 3 1/2 | 3/4-10x3-1/2 flat soc cs ss b18.2.1 b18.3 | 910 |
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| Marine Fasteners | FL | Flat Head Socket Cap Screw | 316, 317, A4 Stainless | Plain | 5/8-11 x 3 1/2 | 5/8-11 x 3-1/2 flt soc cs 316 b18.2.1 b18.3 | 425 |
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| OSSCO | RI | Flat Head Socket Cap Screw | Steel | Plain | 1/4-20 x 3 1/2 | 1/4-20x3 1/2 flat soc cap screw b18.2.1 b18.3 | 100 |
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| QFC | TX | Flat Head Socket Cap Screw | Steel | Plain | 3/8-16 x 3 1/2 | 3/8-16x3 1/2 flat skt cap screw b18.2.1 b18.3 | 1963 |
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| QFC | TX | Flat Head Socket Cap Screw | Steel | Plain | 7/8-9 x 3 1/2 | 7/8-9x3 1/2 flat soc c/s plain b18.2.1 b18.3 | 30 |
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| Bostwick | IN | Flat Head Socket Cap Screw | Steel | Plain | 7/16-14 x 3 1/2 | 7/16-14 x 3 1/2 flat soc cap screw alloy b18.2.1 b18.3 | 21 |
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| NWFAST | TX | Flat Head Socket Cap Screw | Steel | Black Oxide | 5/8-11 x 3 1/2 | 5/8-11 x 3 1/2 flat head socket cap screw alloy steel black oxide b18.2.1 b18.3 | 552 |
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| THRDFAST | FL | Flat Head Socket Cap Screw | Steel | Plain | 1/4-20 x 3 1/2 | flat socket c/s b18.2.1 b18.3 | 43 |
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| THRDFAST | FL | Flat Head Socket Cap Screw | Steel | Plain | 3/4-10 x 3 1/2 | flat socket c/s b18.2.1 b18.3 | 20 |
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| THRDFAST | FL | Flat Head Socket Cap Screw | Steel | Plain | 5/16-18 x 3 1/2 | flat socket c/s b18.2.1 b18.3 | 3 |
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| THRDFAST | TN | Flat Head Socket Cap Screw | Steel | Plain | 5/16-18 x 3 1/2 | flat socket c/s b18.2.1 b18.3 | 300 |
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| THRDFAST | TN | Flat Head Socket Cap Screw | Steel | Plain | 1/2-20 x 3 1/2 | flat socket b18.2.1 b18.3 | 50 |
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| KBS | TN | Flat Head Socket Cap Screw | Steel | Plain | 3/8-16 x 3 1/2 | 3/8-16 x 3 1/2 flat soc cap screw b18.2.1 b18.3 | 887 |
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| THRDFAST | AL | Flat Head Socket Cap Screw | Steel | Plain | 1-8 x 3 1/2 | flat socket c/s b18.2.1 b18.3 | 9 |
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| THRDFAST | FL | Flat Head Socket Cap Screw | Steel | Plain | 5/8-11 x 3 1/2 | flat socket c/s b18.2.1 b18.3 | 5 |
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| THRDFAST | MS | Flat Head Socket Cap Screw | Steel | Plain | 3/4-10 x 3 1/2 | flat socket c/s b18.2.1 b18.3 | 1 |
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| All Size | TX | Flat Head Socket Cap Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-20 x 3 1/2 | 1/4-20 x 3 1/2 flat head socket cap s/s b18.2.1 b18.3 | 11 |
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