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5 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 .
61 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 | |
| Ababa | CA | Square Head Bolt | Steel | Plain | 3/8-16 x 5 1/2 | 3/8-16 x 5-1/2 sq hd bolt steel pln b18.2.1 | 189 |
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| GLF | OH | Square Head Bolt | Steel | Plain | 1/2-13 x 5 1/2 | 1/2-13x5-1/2 square hd bolt stl pln b18.2.1 () | 310 |
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| Hayes | CA | Square Head Bolt | Steel | Galvanized | 5/8-11 x 5 1/2 | 5/8-11 x 5 1/2 square hd bolt hdg | 22 |
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| Hayes | CA | Square Head Bolt | Steel | Zinc/Clear | 5/16-18 x 5 1/2 | 5/16-18 x 5 1/2 square hd bolt zinc | 19 |
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| Hayes | CA | Square Head Bolt | Steel | Galvanized | 1/2-13 x 5 1/2 | 1/2-13 x 5 1/2 square hd bolt hdg | 5 |
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| Hayes | CA | Square Head Bolt | Steel | Plain | 1-8 x 5 1/2 | 1-8 x 5 1/2 square hd bolt pln | 8 |
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| ASMC | IL | Square Head Bolt | Grade A | Galvanized | 1/2-13 x 5 1/2 | a307 gra square hd m/b low carb hdg | 120 |
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| ASMC | IL | Square Head Bolt | Grade A | Plain | 1/2-13 x 5 1/2 | (pt) coarse a307 gra square hd m/b low carb | 16 |
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| ASMC | IL | Square Head Bolt | Grade A | Plain | 3/8-16 x 5 1/2 | (pt) coarse a307 gra square hd m/b low carb b18.2.1 | 150 |
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| Endries | WI | Square Head Bolt | Steel | Galvanized | 1 1/4-7 x 5 1/2 | 1-1/4-7x5-1/2 square head machine bolt hot dip galvanized | 5 |
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| ACCURATE | IL | Square Head Bolt | Steel | Zinc/Clear | 3/8-16 x 5 1/2 | bolt square machine | 1100 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 5/8-11 x 5 1/2 | bolt square machine | 104 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 3/4-10 x 5 1/2 | bolt square machine | 33 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 1-8 x 5 1/2 | bolt square machine | 18 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 1 1/8-7 x 5 1/2 | bolt square machine | 36 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 1 1/4-7 x 5 1/2 | bolt square machine | 7 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 1 1/2-6 x 5 1/2 | bolt square machine | 2 |
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| Liberty | IL | Square Head Bolt | Steel | Plain | 1/2-13 x 5 1/2 | 1/2-13x5-1/2 square m/b w/nut machine bolt w/nut | 297 |
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| Liberty | IL | Square Head Bolt | Steel | Zinc/Yellow | 3/8-16 x 5 1/2 | 3/8-16x5-1/2 square m/b & machine bolt & | 146 |
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| Hodell | OH | Square Head Bolt | Steel | Galvanized | 3/8-16 x 5 1/2 | 3/8-16x5 1/2 square head m/b hdg | 70 |
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| American | NY | Square Head Bolt | Steel | Plain | 5/6-18 x 5 1/2 | square bolt | 250 |
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| American | NY | Square Head Bolt | Steel | Zinc/Yellow | 5/8-11 x 5 1/2 | square m/b zy | 96 |
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| American | NY | Square Head Bolt | Steel | Plain | 1 1/8-7 x 5 1/2 | square hd m/b | 75 |
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| American | NY | Square Head Bolt | Steel | Plain | 5/16-18 x 5 1/2 | square m/s bolt black | 500 |
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| METRO IND | OH | Square Head Bolt | Steel | Plain | 3/4-10 x 5 1/2 | square hd bolt | 30 |
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| XL Screw | GA | Square Head Bolt | Steel | Plain | 3/8-16 x 5 1/2 | square m/b std thrd fsb astm a307 | 200 |
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| XL Screw | GA | Square Head Bolt | Steel | Plain | 1/2-13 x 5 1/2 | square m/b std thrd fsb astm a307 | 140 |
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| XL Screw | GA | Square Head Bolt | Steel | Plain | 3/4-10 x 5 1/2 | square m/b std thrd fsb astm a307 | 60 |
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| XL Screw | GA | Square Head Bolt | Steel | Plain | 1-8 x 5 1/2 | square m/b std thrd fsb astm a307 | 30 |
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| XL Screw | GA | Square Head Bolt | Steel | Plain | 7/8-9 x 5 1/2 | square m/b std thrd fsb astm a307 | 45 |
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| MidStates | MI | Square Head Bolt | Grade 2 | Plain | 3/8-16 x 5 1/2 | 3/8-16x5-1/2 square hd bolt | 132 |
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| Purchase | MO | Square Head Bolt | Grade A | Plain | 1-8 x 5 1/2 | 1-8 x 5 1/2 square machine bolt 307a plain | 10 |
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| MastBolt | OH | Square Head Bolt | Grade 5 | Plain | 1 1/8 x 5 1/2 | 1-1/8 x 5-1/2 square head switch bolt gr 5 with 2-1/2 thread dr@ 5-1/4 w/9/32 hole | 50 pcs |
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| MastBolt | OH | Square Head Bolt | Grade 5 | Plain | 1 1/8 x 5 1/2 | 1-1/8 x 5-1/2 square head switch bolt gr 5 with 2-1/2 thread dr@ 5-1/4 w/9/32 hole | 50 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 1/4-20 x 5 1/2 | 1/4-20 x 5 1/2 square bolts plain b18.2.1 | 20 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 7/8-9 x 5 1/2 | 7/8-9 x 5 1/2 square bolts plain b18.2.1 | 277 |
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| B & K FAST | PA | Square Head Bolt | Grade 8 | Plain | 5/8-11 x 5 1/2 | 5/8-11 x 5 1/2 square bolts gr 8 plain b18.2.1 | 7 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 3/4-10 x 5 1/2 | 3/4-10 x 5 1/2 square bolts plain b18.2.1 | 267 |
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| Kanebridge | IL | Square Head Bolt | Steel | Plain | 5/8-11 x 5 1/2 | 5/8-11x5 1/2 square machine bolt plain | 1.250 |
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| ZAL INDUS | CA | Square Head Bolt | Steel | Galvanized | 3/4-10 x 5 1/2 | 3/4-10 x 5 1/2 sq hd mach bolt hot dip galv | 9 |
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| SRF | AL | Square Head Bolt | Grade 2 | Plain | 3/4-10 x 5 1/2 | square hd bolt | - |
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| CNB | IL | Square Head Bolt | Grade 2 | Plain | 5/8-11 x 5 1/2 | square hd mb gr.2 | 20 |
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| KBS | TN | Square Head Bolt | Grade 8 | Plain | 1 1/8-7 x 5 1/2 | 1-1/8-7 x 5 1/2 square!machbolt gr-8 b18.2.1 | 15 |
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| KBS | TN | Square Head Bolt | Grade 5 | Plain | 1-8 x 5 1/2 | 1-8 x 5 1/2 square mach.bolt gr-5 b18.2.1 | 12 |
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| KBS | TN | Square Head Bolt | Grade 8 | Plain | 1 1/4-7 x 5 1/2 | 1-1/4-7 x 5 1/2 square!machbolt gr-8 b18.2.1 | 50 |
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| KBS | TN | Square Head Bolt | Grade 8 | Plain | 1-8 x 5 1/2 | 1-8 x 5 1/2 square mach bolt gr-8 b18.2.1 | 40 |
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| FMP | MA | Square Head Bolt | Steel | Plain | 3/4-10 x 5 1/2 | square bolt | 200 |
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| FMP | MA | Square Head Bolt | Steel | Plain | 7/8-9 x 5 1/2 | square bolt | 6 |
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| Valley Nu | WA | Square Head Bolt | Steel | Plain | 5/16-18 x 5 1/2 | nc square bolt pl | 11 |
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| Valley Nu | WA | Square Head Bolt | Steel | Zinc/Black | 5/8-11 x 5 1/2 | nc square bolt zb | 1 |
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| Valley Nu | WA | Square Head Bolt | Steel | Zinc/Black | 3/4-10 x 5 1/2 | nc square bolt zb | 189 |
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| Valley Nu | WA | Square Head Bolt | Grade A36 | Galvanized | 1-8 x 5 1/2 | f1554 gr36 sq bolt 5nc hdg | 46 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 1 1/8-7 x 5 1/2 | square m/b | 45 |
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| ACCURATE | IL | Square Head Bolt | Steel | Zinc/Clear | 5/16-18 x 5 1/2 | square m/b | 600 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 3/4-10 x 5 1/2 | square m/b | 200 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 7/8-9 x 5 1/2 | square m/b | 200 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 1-8 x 5 1/2 | square m/b | 50 |
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| ACCURATE | IL | Square Head Bolt | Steel | Plain | 5/8-11 x 5 1/2 | square m/b | 500 |
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| ACCURATE | IL | Square Head Bolt | Steel | Zinc/Clear | 3/8-16 x 5 1/2 | square m/b | 650 |
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| ACCURATE | IL | Square Head Bolt | Steel | Zinc/Clear | 1/4-20 x 5 1/2 | square m/b | 3,225 |
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| ACCURATE | IL | Square Head Bolt | Steel | Zinc/Clear | 1/2-13 x 5 1/2 | square fulthr m/b | 250 |
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