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4 inch length Square Head Bolts (ASME B18. 2.1)
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 .
38 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 | 1/2-13 x 4 | 1/2-13 x 4 sq hd bolt steel pln b18.2.1 | 1 |
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| GLF | OH | Square Head Bolt | Steel | Plain | 3/4-10 x 4 | 3/4-10x4 square hd bolt stl pln b18.2.1 () () () | 53 |
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| GLF | OH | Square Head Bolt | Grade A | Plain | 1-8 x 4 | 1-8x4 square hd bolt a307 stl pln b18.2.1 () | 3 |
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| ASMC | IL | Square Head Bolt | Grade A | Galvanized | 3/8-16 x 4 | a307 gra square hd m/b low carb hdg b18.2.1 | 275 |
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| ASMC | IL | Square Head Bolt | Grade A | Zinc/Clear | 7/8-9 x 4 | a307 gra square hd m/b low carb zp b18.2.1 | 24 |
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| ASMC | IL | Square Head Bolt | Grade A | Galvanized | 1/4-20 x 4 | a307 gra square hd m/b low carb hdg b18.2.1 | 500 |
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| ASMC | IL | Square Head Bolt | Grade A | Zinc/Clear | 3/4-10 x 4 | a307 gra square hd m/b low carb zp b18.2.1 | 40 |
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| ASMC | IL | Square Head Bolt | Grade A | Plain | 3/8-16 x 4 | (pt) coarse a307 gra square hd m/b low carb b18.2.1 | 150 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 3/8-16 x 4 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 x 4 | bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1 | 1500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 3/4-10 x 4 | bolt & c/s square boltsquare b18.2.1 | 600 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Zinc/Yellow | 3/4-16 x 4 | bolt & c/s square boltfulthr b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 7/16-14 x 4 | bolt & c/s square boltsquare b18.2.1 | 1000 |
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| BIG BOLT | IL | Square Head Bolt | Steel | Plain | 1 3/8-6 x 4 | bolt & c/s square boltb18.2.1 | 1312 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 5/16-18 x 4 | bolt & c/s square boltsquare b18.2.1 | 34100 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 1/2-13 x 4 | bolt & c/s square boltsquare b18.2.1 | 4000 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 5/8-11 x 4 | bolt & c/s square boltsquare b18.2.1 | 1381 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 4 | bolt & c/s square boltsquare b18.2.1 | 870 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 7/16-20 x 4 | bolt & c/s square boltsquare b18.2.1 | 1000 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 1/4-20 x 4 | bolt & c/s square boltsquare b18.2.1 | 6000 |
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| JET FITTING | CA | Square Head Bolt | Grade A | Plain | 1/4-20 x 4 | 1/4-20x4 a307 gr a square hd bolt pln 747023 b18.2.1 | 589 |
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| B & K FAST | PA | Square Head Bolt | Steel | Galvanized | 5/8-11 x 4 | 5/8-11 x 4 galv square bolts b18.2.1 | 581 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 1/2-13 x 4 | 1/2-13 x 4 square bolts plain b18.2.1 | 708 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 7/8-9 x 4 | 7/8-9 x 4 square bolts plain b18.2.1 | 1 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 3/4-10 x 4 | 3/4-10 x 4 square bolts plain b18.2.1 | 17 |
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| BHAM | TX | Square Head Bolt | Steel | Galvanized | 3/8-16 x 4 | 3/8-16x4 square head bolt hdg b18.2.1 | 43 |
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| OSSCO | RI | Square Head Bolt | Steel | Plain | 1 1/4-7 x 4 | 1 1/4-7x4 square hd mach bolt b18.2.1 | 3 |
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| OSSCO | RI | Square Head Bolt | Steel | Galvanized | 1/4-20 x 4 | 1/4-20x4 square hd mach bolt h.d.g. b18.2.1 | 8 |
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| THRDFAST | OK | Square Head Bolt | Steel | Galvanized | 7/8-9 x 4 | square hd bolt hdg b18.2.1 | 215 |
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| THRDFAST | OK | Square Head Bolt | Steel | Galvanized | 5/8-11 x 4 | square hd bolt hdg b18.2.1 | 117 |
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| THRDFAST | TN | Square Head Bolt | Steel | Galvanized | 3/8-16 x 4 | square hd bolt hdg b18.2.1 | 174 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 1-8 x 4 | square hd bolt hdg b18.2.1 | 13 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 7/8-9 x 4 | square hd bolt hdg b18.2.1 | 10 |
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| KBS | TN | Square Head Bolt | Grade 8 | Plain | 1 1/4-7 x 4 | 1-1/4-7 x 4 square!machbolt gr-8 b18.2.1 | 50 |
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| KBS | TN | Square Head Bolt | Grade 5 | Plain | 1 1/4-7 x 4 | 1-1/4-7 x 4 square mach.bolt gr-5 b18.2.1 | 10 |
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| KBS | TN | Square Head Bolt | Grade 8 | Plain | 3/4-10 x 4 | 3/4-10 x 4 square mach bolt gr-8 b18.2.1 | 219 |
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| KBS | TN | Square Head Bolt | Steel | Plain | 7/8-9 x 4 | 7/8-9 x 4 square hd mach.bolt b18.2.1 | 123 |
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| THRDFAST | FL | Square Head Bolt | Grade 8 | Plain | 3/4-10 x 4 | gr8 square hd bolt b18.2.1 | 17 |
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