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3/8 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 .
48 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 | |
| GLF | OH | Square Head Bolt | Grade A | Plain | 3/8-16 x 3 | 3/8-16x3 square hd bolt a307 stl pln b18.2.1 () () () | 28 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 3/8-16 x 12 | bolt & c/s square boltsquare b18.2.1 | 500 |
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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 | Grade 8 | Plain | 3/8-16 x 10 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 3/8-16 x 10 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 3/8-16 x 16 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Steel | Plain | 3/8-16 x 4 1/4 | bolt & c/s square boltsquare b18.2.1 | 2582 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 3/8-16 x 1 1/2 | bolt & c/s square boltsquare b18.2.1 | 3100 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 3/8-16 x 6 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 3/8-16 x 8 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 3/8-16 x 2 1/4 | bolt & c/s square boltsquare b18.2.1 | 12000 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 3/8-16 x 8 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 3/8-16 x 2 | bolt & c/s square boltsquare b18.2.1 | 2600 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 3/8-16 x 1 | bolt & c/s square boltsquare b18.2.1 | 5000 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 3/8-16 x 6 | bolt & c/s square boltsquare b18.2.1 | 3800 |
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| 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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| 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 | 3/8-16 x 1 1/2 | a307 gra square hd m/b low carb zp b18.2.1 | 750 |
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| ASMC | IL | Square Head Bolt | Grade A | Galvanized | 3/8-16 x 3 | a307 gra square hd m/b low carb hdg b18.2.1 | 325 |
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| ASMC | IL | Square Head Bolt | Grade A | Galvanized | 3/8-16 x 2 1/2 | a307 gra square hd m/b low carb hdg b18.2.1 | 100 |
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| ASMC | IL | Square Head Bolt | Grade A | Zinc/Clear | 3/8-16 x 2 1/4 | a307 gra square hd m/b low carb zp b18.2.1 | 550 |
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| ASMC | IL | Square Head Bolt | Grade A | Galvanized | 3/8-16 x 3 1/2 | a307 gra square hd m/b low carb hdg b18.2.1 | 250 |
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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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| 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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| Ababa | CA | Square Head Bolt | Steel | Plain | 3/8-16 x 2 1/2 | 3/8-16 x 2 1/2 sq hd bolt steel pln b18.2.1 | 1 |
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| JET FITTING | CA | Square Head Bolt | Grade A | Plain | 3/8-16 x 2 3/4 | 3/8-16x2 3/4 a307 gr a square hd bolt p 747099 b18.2.1 | 50 |
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| JET FITTING | CA | Square Head Bolt | Grade A | Plain | 3/8-16 x 1 3/4 | 3/8-16x1 3/4 a307 gr a square hd bolt p 747094 b18.2.1 | 255 |
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| QFC | TX | Square Head Bolt | Grade A | Galvanized | 3/8-16 x 3/4 | 3/8-16x3/4 square head bolt a307 hdg b18.2.1 | 987 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 3/8-16 x 1 1/4 | 3/8-16 x 1 1/4 square bolts plain b18.2.1 | 6 |
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| B & K FAST | PA | Square Head Bolt | Steel | Zinc/Clear | 3/8-16 x 1 1/4 | 3/8-16 x 1 1/4 square bolts zinc b18.2.1 | 854 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 3/8-16 x 2 | 3/8-16 x 2 square bolts plain b18.2.1 | 215 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 3/8-16 x 7 1/2 | 3/8-16 x 7 1/2 square bolts plain b18.2.1 | 2 |
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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 | 3/8-16 x 1 1/2 | 3/8-16x1 1/2 square hd mach bolt b18.2.1 | 434 |
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| OSSCO | RI | Square Head Bolt | Steel | Plain | 3/8-16 x 6 | 3/8-16x6 square hd mach bolt b18.2.1 | 5 |
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| QFC | TX | Square Head Bolt | Grade 2 | Zinc/Clear | 3/8-16 x 1 | 3/8-16x1 sq head bolt gr2 zinc b18.2.1 | 70 |
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| JET FITTING | CA | Square Head Bolt | Grade A | Plain | 3/8-16 x 1 3/4 | 3/8-16x1-3/4 (pt) square bolt steel a307 plain b18.2.1 | 250 |
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| JET FITTING | CA | Square Head Bolt | Grade A | Plain | 3/8-16 x 2 3/4 | 3/8-16x2 3/4 (pt) bolts square head bolts a307 grade a square head bolt plain (inch) b18.2.1 | 400 |
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| JET FITTING | CA | Square Head Bolt | Grade A | Plain | 3/8-16 x 5 | 3/8-16x5 (pt) bolts square head bolts a307 grade a square head bolt plain (inch) b18.2.1 | 150 |
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| THRDFAST | FL | Square Head Bolt | Steel | Galvanized | 3/8-16 x 11 | square hd bolt hdg b18.2.1 | 108 |
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| THRDFAST | FL | Square Head Bolt | Grade 5 | Plain | 3/8-16 x 2 | gr5 square hd bolt b18.2.1 | 10 |
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| THRDFAST | FL | Square Head Bolt | Steel | Plain | 3/8-16 x 2 1/2 | square hd bolt b18.2.1 | 3 |
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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 | 3/8-16 x 1 | square hd bolt hdg b18.2.1 | 15 |
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| KBS | TN | Square Head Bolt | Steel | Plain | 3/8-16 x 1 1/2 | 3/8-16 x 1 1/2 square hd mach.bolt b18.2.1 | 2,048 |
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| THRDFAST | MS | Square Head Bolt | Steel | Plain | 3/8-16 x 3 | square hd bolt b18.2.1 | 50 |
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| THRDFAST | MS | Square Head Bolt | Steel | Plain | 3/8-16 x 1/2 | square hd bolt b18.2.1 | 100 |
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| WSB | KY | Square Head Bolt | Steel | Plain | 3/8-16 x 1 1/4 | blt sqr sbrz (pl) 3/8-16x1 1/4 b18.2.1 | 682 |
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