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1/2 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 .
87 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 | 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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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 6 | bolt & c/s square boltsquare b18.2.1 | 10000 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 12 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 10 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 1 1/4 | bolt & c/s square boltsquare b18.2.1 | 14100 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 1 1/2 | bolt & c/s square boltsquare fulthr b18.2.1 | 3201 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 3 1/4 | bolt & c/s square boltsquare b18.2.1 | 1000 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 1/2-13 x 6 | bolt & c/s square boltsquare b18.2.1 | 1000 |
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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 8 | Plain | 1/2-13 x 5 | bolt & c/s square boltsquare b18.2.1 | 750 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 1/2-13 x 8 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 1/2-13 x 1 1/4 | bolt & c/s square boltsquare b18.2.1 | 11819 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 3 | bolt & c/s square boltsquare b18.2.1 | 5000 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 1/2-13 x 7 | bolt & c/s square boltsquare b18.2.1 | 800 |
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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 5 | Plain | 1/2-13 x 2 1/2 | bolt & c/s square boltsquare fulthr b18.2.1 | 10800 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 1/2-13 x 14 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 1 3/4 | bolt & c/s square boltsquare b18.2.1 | 6800 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 1/2-13 x 12 | bolt & c/s square boltsquare b18.2.1 | 500 |
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| BIG BOLT | IL | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 2 | bolt & c/s square boltsquare b18.2.1 | 21000 |
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| BIG BOLT | IL | Square Head Bolt | Grade 8 | Plain | 1/2-13 x 2 | bolt & c/s square boltsquare b18.2.1 | 2900 |
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| 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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| ASMC | IL | Square Head Bolt | Grade A | Plain | 1/2-13 x 1 | (ft) coarse a307 gra square hd m/b low carb b18.2.1 | 260 |
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| ASMC | IL | Square Head Bolt | Grade A | Plain | 1/2-13 x 3 | (pt) coarse a307 gra square hd m/b low carb b18.2.1 | 25 |
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| ASMC | IL | Square Head Bolt | Grade A | Plain | 1/2-13 x 5 | (pt) coarse a307 gra square hd m/b low carb b18.2.1 | 10 |
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| ASMC | IL | Square Head Bolt | Grade A | Zinc/Clear | 1/2-13 x 8 | a307 gra square hd m/b low carb zp b18.2.1 | 28 |
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| ASMC | IL | Square Head Bolt | Grade A | Plain | 1/2-13 x 8 | 1/2-13x8 (pt) unc a307 gra square hd machine bolt low carb pln b18.2.1 | 13 |
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| ASMC | IL | Square Head Bolt | Grade A | Plain | 1/2-13 x 7 | (pt) coarse a307 gra square hd m/b low carb b18.2.1 | 60 |
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| ASMC | IL | Square Head Bolt | Grade A | Galvanized | 1/2-13 x 1 3/4 | a307 gra square hd m/b low carb hdg b18.2.1 | 340 |
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| ASMC | IL | Square Head Bolt | Grade A | Plain | 1/2-13 x 6 | (pt) coarse a307 gra square hd m/b low carb b18.2.1 | 5 |
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| ASMC | IL | Square Head Bolt | Grade A | Galvanized | 1/2-13 x 1 1/4 | 1/2-13x1 1/4 a307 gra square hd machine bolt low carb hdg b18.2.1 | 450 |
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| ASMC | IL | Square Head Bolt | Grade A | Zinc/Clear | 1/2-13 x 1 1/2 | a307 gra square hd m/b low carb zp b18.2.1 | 229 |
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| JET FITTING | CA | Square Head Bolt | Grade A | Plain | 1/2-13 x 1 1/2 | 1/2-13x1 1/2 a307 gr a square hd bolt p 747172 b18.2.1 | 157 |
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| JET FITTING | CA | Square Head Bolt | Grade A | Plain | 1/2-13 x 7 | 1/2-13x7 a307 gr a square hd bolt pln 747194 b18.2.1 | 75 |
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| JET FITTING | CA | Square Head Bolt | Grade A | Plain | 1/2-13 x 3 1/2 | 1/2-13x3 1/2 a307 gr a square hd bolt p 747182 b18.2.1 | 7 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 1/2-13 x 1 1/4 | 1/2-13 x 1 1/4 square bolts plain b18.2.1 | 2788 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 1/2-13 x 1 1/2 | 1/2-13 x 1 1/2 square bolts plain b18.2.1 | 323 |
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| B & K FAST | PA | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 1 3/4 | 1/2-13 x 1 3/4 square bolts gr 5 plain b18.2.1 | 4 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 1/2-13 x 1 3/4 | 1/2-13 x 1 3/4 square bolts plain full thread b18.2.1 | 1 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 1/2-13 x 2 | 1/2-13 x 2 square bolts plain b18.2.1 | 197 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 1/2-13 x 3 | 1/2-13 x 3 square bolts plain b18.2.1 | 244 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 1/2-13 x 3 1/4 | 1/2-13 x 3 1/4 square bolts plain b18.2.1 | 495 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 1/2-13 x 3 1/2 | 1/2-13 x 3 1/2 square bolts plain b18.2.1 | 8 |
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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 | 1/2-13 x 6 | 1/2-13 x 6 square bolts plain b18.2.1 | 467 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 1/2-13 x 6 | 1/2-13 x 6 square bolts plain full thread b18.2.1 | 120 |
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| B & K FAST | PA | Square Head Bolt | Steel | Plain | 1/2-13 x 19 | 1/2-13 x 19 square bolts plain b18.2.1 | 38 |
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| BHAM | AL | Square Head Bolt | Steel | Plain | 1/2-13 x 1 | 1/2-13x1 square hd mach bolt b18.2.1 | 25 |
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| Bostwick | IN | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 2 1/2 | 1/2-13 x 2 1/2 square hd bolt gr 5 b18.2.1 | 76 |
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| Bostwick | IN | Square Head Bolt | Grade 5 | Plain | 1/2-13 x 2 | 1/2-13 x 2 square hd bolt gr 5 b18.2.1 | 52 |
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| Bostwick | IN | Square Head Bolt | Grade 2 | Plain | 1/2-13 x 1 1/2 | 1/2-13 x 1 1/2 square hd bolt grade 2 b18.2.1 | 70 |
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| JET FITTING | CA | Square Head Bolt | Steel | Plain | 1/2-13 x 1 | 1/2-13x1 square machine bolts steel plain b18.2.1 | 450 |
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| JET FITTING | CA | Square Head Bolt | Grade A | Plain | 1/2-13 x 3 1/2 | 1/2-13x3-1/2 (pt) square bolt steel a307 plain b18.2.1 | 54 |
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| JET FITTING | CA | Square Head Bolt | Grade A | Plain | 1/2-13 x 7 | 1/2-13x7 (pt) square bolt steel a307 plain b18.2.1 | 25 |
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| THRDFAST | FL | Square Head Bolt | Steel | Plain | 1/2-13 x 3 1/2 | square hd bolt b18.2.1 | 145 |
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| THRDFAST | FL | Square Head Bolt | Steel | Galvanized | 1/2-13 x 1 1/4 | square hd bolt hdg b18.2.1 | 112 |
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| THRDFAST | FL | Square Head Bolt | Steel | Plain | 1/2-13 x 3 1/2 | square hd bolt b18.2.1 | 8 |
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| THRDFAST | OK | Square Head Bolt | Steel | Plain | 1/2-13 x 1 3/4 | square hd bolt b18.2.1 | 480 |
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| THRDFAST | OK | Square Head Bolt | Steel | Plain | 1/2-13 x 2 | square hd bolt b18.2.1 | 430 |
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| THRDFAST | OK | Square Head Bolt | Steel | Plain | 1/2-13 x 1 1/4 | square hd bolt b18.2.1 | 400 |
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| THRDFAST | OK | Square Head Bolt | Steel | Galvanized | 1/2-13 x 6 | square hd bolt hdg b18.2.1 | 88 |
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| THRDFAST | TN | Square Head Bolt | Steel | Plain | 1/2-13 x 1 3/4 | square hd bolt b18.2.1 | 50 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 1/2-13 x 2 1/4 | square hd bolt hdg b18.2.1 | 275 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 1/2-13 x 1 | square hd bolt hdg b18.2.1 | 194 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 1/2-13 x 8 | square hd bolt rt4 hdg b18.2.1 | 100 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 1/2-13 x 14 | square hd bolt hdg b18.2.1 | 38 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 1/2-13 x 1 1/4 | square hd bolt hdg b18.2.1 | 28 |
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| THRDFAST | AL | Square Head Bolt | Silicon Bronze | Plain | 1/2-13 x 2 | sili brnz sq bolt b18.2.1 | 22 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 1/2-13 x 12 | square hd bolt hdg b18.2.1 | 16 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 1/2-13 x 16 | square hd bolt hdg b18.2.1 | 62 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 1/2-13 x 9 | square hd bolt rt4 hdg b18.2.1 | stock |
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| KBS | TN | Square Head Bolt | Steel | Plain | 1/2-13 x 12 | 1/2-13 x 12 square hd mach.bolt b18.2.1 | 4 |
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| KBS | TN | Square Head Bolt | Steel | Plain | 1/2-13 x 3 1/4 | 1/2-13 x 3 1/4 square hd mach.bolt b18.2.1 | 303 |
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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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| KBS | TN | Square Head Bolt | Grade 8 | Plain | 1/2-13 x 2 | 1/2-13 x 2 square mach bolt gr-8 b18.2.1 | 110 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 1/2-13 x 1 1/2 | square hd bolt hdg b18.2.1 | 575 |
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| THRDFAST | AL | Square Head Bolt | Steel | Galvanized | 1/2-13 x 2 | square hd bolt hdg b18.2.1 | 134 |
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| THRDFAST | FL | Square Head Bolt | Steel | Plain | 1/2-13 x 2 3/4 | square hd bolt b18.2.1 | 39 |
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| THRDFAST | MS | Square Head Bolt | Steel | Galvanized | 1/2-13 x 6 | square hd bolt hdg b18.2.1 | 18 |
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| WSB | KY | Square Head Bolt | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 2 | blt sqr (18-8) 1/2-13x2 b18.2.1 | 47 |
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| FACCA | Ont | Square Head Bolt | Grade A | Galvanized | 1/2-13 x 1 1/2 | square hd machine bolt w/square nut 1/2-13 unc x 1-1/2 lg grade a steel as per astm a307 galvanized as per csa g164 b18.2.1 | 600 |
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