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4 1/2 inch length Square Head Bolts
Square Head Bolts were once the most common form of bolt, until they were replaced by hex head bolts. They are covered under ANSI Standard B18.2.1 and are now most commonly used for aesthetic purposes to provide a rustic look .
80 results, (click on any line for more information)
| Buy Square Head Bolts from one of our FCH Network Members | ||||||||
|---|---|---|---|---|---|---|---|---|
| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| MESAFAST | CA | Square Head Bolt | Steel | Zinc/Clear | 3/8-16 x 4 1/2 | square bolt | 93.0 |
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| Jackson | MS | Square Head Bolt | Grade 2 | Plain | 1/2-13 x 4 1/2 | square bolt gr. 2 | 1 |
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| Jackson | MS | Square Head Bolt | Grade 5 | Plain | 5/8-11 x 4 1/2 | nc square bolt gr. 5 f/t | 5 |
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| Jackson | MS | Square Head Bolt | Grade 5 | Plain | 3/4-10 x 4 1/2 | square | 13 |
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| Jackson | MS | Square Head Bolt | Grade 8 | Plain | 5/8-11 x 4 1/2 | 5/8-11x4-1/2 square bolt gr. 8 | 1 |
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| Future Fastener | TX | Square Head Bolt | Steel | Galvanized | 3/8 x 4 1/2 | 3/8 x 4 1/2 sq head machine bolt galv | 300 |
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| YANKEE | NH | Square Head Bolt | Steel | Plain | 3/4-10 x 4 1/2 | 3/4-10 x 4 1/2 square hd bolt | 2 |
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| YANKEE | NH | Square Head Bolt | Steel | Plain | 1/2-13 x 4 1/2 | square hd bolt | 160 |
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| Hayes | CA | Square Head Bolt | Steel | Plain | 1/2-13 x 4 1/2 | 1/2-13 x 4 1/2 square hd bolt pln | 50 |
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| Hayes | CA | Square Head Bolt | Steel | Galvanized | 7/8-9 x 4 1/2 | 7/8-9 x 4 1/2 square hd bolt hdg | 5 |
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| Hayes | CA | Square Head Bolt | Steel | Zinc/Clear | 7/8-9 x 4 1/2 | 7/8-9 x 4 1/2 square hd bolt zinc | 12 |
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| Hayes | CA | Square Head Bolt | Steel | Plain | 5/8-11 x 4 1/2 | 5/8-11 x 4 1/2 square hd bolt pln | 17 |
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| BHAM | AL | Square Head Bolt | Steel | Plain | 7/8-9 x 4 1/2 | 7/8-9x4 1/2 square head bolt b18.2.1 | 5 |
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| Cal Fastenrs | CA | Square Head Bolt | Steel | Plain | 1/2-13 x 4 1/2 | square m/b - square bolt | 40 |
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| CIF | IL | Square Head Bolt | Grade 2 | Plain | 5/8-11 x 4 1/2 | 5/8-11x4 1/2 square head machine bolt grade 2 plain (53) (53) (53) () | 53 |
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| ASMC | IL | Square Head Bolt | Grade A | Zinc/Clear | 3/4-10 x 4 1/2 | a307 gra square hd m/b low carb zp | 20 |
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| Endries | WI | Square Head Bolt | Steel | Zinc/Yellow | 5/8-11 x 4 1/2 | 5/8-11x4-1/2 square head machine bolt yellow zinc | 389 |
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| Endries | WI | Square Head Bolt | Steel | Plain | 7/8-9 x 4 1/2 | 7/8-9x4-1/2 square head machine bolt plain | 43 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 1/2-13 x 4 1/2 | bolt square machine | 119 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 3/4-10 x 4 1/2 | bolt square machine | 165 |
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| ACCURATE | IL | Square Head Bolt | Steel | Zinc/Clear | 1/2-13 x 4 1/2 | bolt square machine | 17 |
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| ACCURATE | IL | Square Head Bolt | Steel | Zinc/Clear | 3/8-16 x 4 1/2 | bolt square machine | 400 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 1/2-13 x 4 1/2 | bolt square machine f/t | 4 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 1 1/8-7 x 4 1/2 | bolt square machine | 18 |
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| Liberty | IL | Square Head Bolt | Steel | Plain | 1/4-20 x 4 1/2 | square hd mach bolt | 200 |
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| Liberty | IL | Square Head Bolt | Steel | Plain | 5/16-18 x 4 1/2 | 5/16-18x4-1/2 square m/b 1 5/6 tl m/b 1 5/6 tl | 180 |
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| Hodell | OH | Square Head Bolt | Steel | Galvanized | 3/8-16 x 4 1/2 | 3/8-16x4 1/2 square head m/b hdg | 120 |
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| American | NY | Square Head Bolt | Steel | Plain | 3/8-16 x 4 1/2 | square m/b | 50 |
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| American | NY | Square Head Bolt | Steel | Black Oxide | 3/8-16 x 4 1/2 | square hd m/b black ox | 10 |
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| American | NY | Square Head Bolt | Steel | Zinc/Clear | 1/4-20 x 4 1/2 | square bolt pl | 100 |
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| American | NY | Square Head Bolt | Steel | Plain | 5/8-11 x 4 1/2 | square m/b | 300 |
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| XL Screw | GA | Square Head Bolt | Steel | Plain | 3/8-16 x 4 1/2 | square m/b std thrd fsb astm a307 | 250 |
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| XL Screw | GA | Square Head Bolt | Steel | Plain | 1/2-13 x 4 1/2 | square m/b std thrd fsb astm a307 | 170 |
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| XL Screw | GA | Square Head Bolt | Steel | Plain | 5/8-11 x 4 1/2 | square m/b std thrd fsb astm a307 | 100 |
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| XL Screw | GA | Square Head Bolt | Steel | Plain | 3/4-10 x 4 1/2 | square m/b std thrd fsb astm a307 | 70 |
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| XL Screw | GA | Square Head Bolt | Steel | Plain | 1-8 x 4 1/2 | square m/b std thrd fsb astm a307 | 35 |
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| SWACO | OH | Square Head Bolt | Grade A | Plain | 1/2-13 x 4 1/2 | 1/2-13x4 1/2 a307 gr a square hd bolt p | 56 |
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| MidStates | MI | Square Head Bolt | Grade 2 | Zinc/Clear | 1/4-20 x 4 1/2 | square hd bolt znc | 176 |
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| MidStates | MI | Square Head Bolt | Grade 2 | Plain | 5/16-18 x 4 1/2 | 5/16-18 x 4 1/2 square hd bolt gr 2 pln | 272 |
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| MidStates | MI | Square Head Bolt | Grade 5 | Plain | 3/4-10 x 4 1/2 | 3/4-10 x 4 1/2 square hd bolt gr 5 pln | 25 |
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| MidStates | MI | Square Head Bolt | Grade 8 | Plain | 1/2-13 x 4 1/2 | 1/2-13 x 4 1/2 square hd bolt gr 8 pln | 1 |
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| IPC | VA | Square Head Bolt | Grade A | Zinc/Yellow | 3/4-10 x 4 1/2 | 3/4-10x4 1/2 square hd mach bolt a307 steel zinc yellow | 62 |
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| IPC | VA | Square Head Bolt | Grade 5 | Zinc/Yellow | 5/8-11 x 4 1/2 | 5/8-11x4 1/2 square hd mach bolt grade 5 steel zinc yellow | 114 |
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| Northern | MN | Square Head Bolt | Steel | Plain | 1-8 x 4 1/2 | 1-8x4-1/2 #5 square hd bolt | 130 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 5/8-11 x 4 1/2 | bolt & c/s square boltsquare b18.2.1 | 3316 |
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| Delta | TX | Square Head Bolt | Steel | Plain | 3/4-10 x 4 1/2 | square hd bolt plain 3/4-10 x 4 1/2 | 80 |
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| ISSCO | MO | Square Head Bolt | Grade 8 | Plain | 1-14 x 4 1/2 | 52 |
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| ISSCO | MO | Square Head Bolt | Grade 2 | Plain | 7/8-9 x 4 1/2 | 935 |
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| ISSCO | MO | Square Head Bolt | Grade 2 | Zinc/Clear | 1/2-13 x 4 1/2 | 450 |
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| ISSCO | MO | Square Head Bolt | Grade 2 | Plain | 1/2-13 x 4 1/2 | 455 |
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| B & K FAST | PA | Square Head Bolt | Steel | Galvanized | 5/8-11 x 4 1/2 | 5/8-11 x 4 1/2 galv square bolts b18.2.1 | 23 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 7/8-9 x 4 1/2 | 7/8-9 x 4 1/2 square bolts plain b18.2.1 | 76 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 3/4-10 x 4 1/2 | 3/4-10 x 4 1/2 square bolts plain b18.2.1 | 8 |
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| Kanebridge | IL | Square Head Bolt | Steel | Plain | 1/2-13 x 4 1/2 | 1/2-13x4 1/2 square machine bolt plain | 2.500 |
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| Kanebridge | IL | Square Head Bolt | Steel | Plain | 3/4-10 x 4 1/2 | 3/4-10x4 1/2 square machine bolt plain | 1,000 |
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| Kanebridge | IL | Square Head Bolt | Steel | Plain | 7/8-9 x 4 1/2 | 7/8-9x4 1/2 square machine bolt plain | 0.750 |
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| BHAM | TX | Square Head Bolt | Grade A | Galvanized | 3/8-16 x 4 1/2 | a307 square hd mach bolt hdg | 257 |
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| Bostwick | IN | Square Head Bolt | Grade 8 | Plain | 1-14 x 4 1/2 | 1-14 x 4-1/2 square head bolt grade 8 b18.2.1 | 12 |
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| Lippin | CA | Square Head Bolt | Steel | Plain | 1/2-13 x 4 1/2 | square head bolt plain | 190 |
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| THRDFAST | FL | Square Head Bolt | Steel | Plain | 1 1/8-7 x 4 1/2 | square hd bolt b18.2.1 | 4 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 5/8-11 x 4 1/2 | square hd bolt hdg b18.2.1 | 98 |
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| KBS | TN | Square Head Bolt | Grade 8 | Plain | 1 1/4-7 x 4 1/2 | 1-1/4-7 x 4 1/2 square!machbolt gr-8 b18.2.1 | 90 |
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| KBS | TN | Square Head Bolt | Steel | Plain | 1/2-13 x 4 1/2 | 1/2-13 x 4 1/2 square hd mach.bolt b18.2.1 | 358 |
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| BRIGHBEST | IL | Square Head Bolt | Steel | Chrome | 5/8-11 x 4 1/2 | 5/8-11 x 4-1/2 sq hd chrome plated | 44 |
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| FMP | MA | Square Head Bolt | Steel | Plain | 1/4-20 x 4 1/2 | square bolt | 25 |
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| FMP | MA | Square Head Bolt | Steel | Plain | 5/8-11 x 4 1/2 | square bolt | 2500 |
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| FMP | MA | Square Head Bolt | Steel | Zinc/Clear | 3/4-10 x 4 1/2 | square bolt | 49 |
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| FMP | MA | Square Head Bolt | Steel | Plain | 7/8-9 x 4 1/2 | square bolt | 300 |
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| Valley Nu | WA | Square Head Bolt | Grade 8 | Plain | 1-8 x 4 1/2 | nc gr8 square hd bolt | 10 |
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| Valley Nu | WA | Square Head Bolt | Steel | Zinc/Black | 5/8-11 x 4 1/2 | nc square bolt zb | 3 |
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| Valley Nu | WA | Square Head Bolt | Steel | Zinc/Black | 3/4-10 x 4 1/2 | nc square bolt zb | 3 |
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| Valley Nu | WA | Square Head Bolt | Steel | Zinc/Black | 1/2-13 x 4 1/2 | nc square bolt zb | 48 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 7/8-9 x 4 1/2 | square m/b | 100 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 3/4-10 x 4 1/2 | square m/b | 300 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 1-8 x 4 1/2 | square m/b | 100 |
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| ACCURATE | IL | Square Head Bolt | Steel | Zinc/Clear | 3/8-16 x 4 1/2 | square m/b | 925 |
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| ACCURATE | IL | Square Head Bolt | Steel | Zinc/Clear | 1/4-20 x 4 1/2 | square m/b | 1,000 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 1 1/8-7 x 4 1/2 | square m/b | 75 |
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| ACCURATE | IL | Square Head Bolt | Steel | Zinc/Clear | 1/2-13 x 4 1/2 | square m/b | 1,400 |
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| ACCURATE | IL | Square Head Bolt | Steel | Zinc/Clear | 5/16-18 x 4 1/2 | square m/b | 200 |
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