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Square bolts (also known as square head bolts or square head machine bolts) offer less danger of wrench slippage in hand wrenching, as well as a greater bearing area. In addition, the square head style is more secure than a hex bolt style when fixed into a cored recess.
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Diameter

Pitch

Coarse

Length

Material

A307 Grade A

Finish

Plain

Item #

Item Name

Diameter

Pitch

Length

Material

Finish

Package Quantity

Web Price

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N/A 1/4-20 X 3/4 SQUARE HEAD BOLT A307 GRADE A N/A 1/4 N/A Coarse N/A 3/4 N/A A307 Grade A N/A Plain N/A 3000 $103.88 Add To Cart
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N/A 1/4-20 X 1 SQUARE HEAD BOLT A307 GRADE A N/A 1/4 N/A Coarse N/A 1 N/A A307 Grade A N/A Plain N/A 2500 $101.75 Add To Cart
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N/A 1/4-20 X 1 1/4 SQUARE HEAD BOLT A307 GRADE A N/A 1/4 N/A Coarse N/A 1 1/4 N/A A307 Grade A N/A Plain N/A 2000 $96.80 Add To Cart
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N/A 1/4-20 X 1 1/2 SQUARE HEAD BOLT A307 GRADE A N/A 1/4 N/A Coarse N/A 1 1/2 N/A A307 Grade A N/A Plain N/A 1500 $84.19 Add To Cart
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N/A 1/4-20 X 2 SQUARE HEAD BOLT A307 GRADE A N/A 1/4 N/A Coarse N/A 2 N/A A307 Grade A N/A Plain N/A 1200 $85.71 Add To Cart
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N/A 1/4-20 X 2 1/2 SQUARE HEAD BOLT A307 GRADE A N/A 1/4 N/A Coarse N/A 2 1/2 N/A A307 Grade A N/A Plain N/A 1000 $86.65 Add To Cart
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N/A 1/4-20 X 3 SQUARE HEAD BOLT A307 GRADE A N/A 1/4 N/A Coarse N/A 3 N/A A307 Grade A N/A Plain N/A 900 $91.49 Add To Cart
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N/A 1/4-20 X 3 1/2 SQUARE HEAD BOLT A307 GRADE A N/A 1/4 N/A Coarse N/A 3 1/2 N/A A307 Grade A N/A Plain N/A 750 $87.90 Add To Cart
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N/A 1/4-20 X 4 SQUARE HEAD BOLT A307 GRADE A N/A 1/4 N/A Coarse N/A 4 N/A A307 Grade A N/A Plain N/A 700 $92.63 Add To Cart
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N/A 5/16-18 X 3/4 SQUARE HEAD BOLT A307 GRADE A N/A 5/16 N/A Coarse N/A 3/4 N/A A307 Grade A N/A Plain N/A 2000 $130.60 Add To Cart
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N/A 5/16-18 X 1 SQUARE HEAD BOLT A307 GRADE A N/A 5/16 N/A Coarse N/A 1 N/A A307 Grade A N/A Plain N/A 1500 $110.81 Add To Cart
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N/A 5/16-18 X 1 1/4 SQUARE HEAD BOLT A307 GRADE A N/A 5/16 N/A Coarse N/A 1 1/4 N/A A307 Grade A N/A Plain N/A 1200 $103.38 Add To Cart
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N/A 5/16-18 X 1 1/2 SQUARE HEAD BOLT A307 GRADE A N/A 5/16 N/A Coarse N/A 1 1/2 N/A A307 Grade A N/A Plain N/A 1200 $118.62 Add To Cart
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N/A 5/16-18 X 2 SQUARE HEAD BOLT A307 GRADE A N/A 5/16 N/A Coarse N/A 2 N/A A307 Grade A N/A Plain N/A 800 $98.80 Add To Cart
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N/A 5/16-18 X 2 1/2 SQUARE HEAD BOLT A307 GRADE A N/A 5/16 N/A Coarse N/A 2 1/2 N/A A307 Grade A N/A Plain N/A 700 $104.04 Add To Cart
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N/A 5/16-18 X 3 SQUARE HEAD BOLT A307 GRADE A N/A 5/16 N/A Coarse N/A 3 N/A A307 Grade A N/A Plain N/A 600 $103.89 Add To Cart
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N/A 5/16-18 X 3 1/2 SQUARE HEAD BOLT A307 GRADE A N/A 5/16 N/A Coarse N/A 3 1/2 N/A A307 Grade A N/A Plain N/A 500 $99.08 Add To Cart
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N/A 5/16-18 X 4 SQUARE HEAD BOLT A307 GRADE A N/A 5/16 N/A Coarse N/A 4 N/A A307 Grade A N/A Plain N/A 450 $100.26 Add To Cart
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N/A 5/16-18 X 5 SQUARE HEAD BOLT A307 GRADE A N/A 5/16 N/A Coarse N/A 5 N/A A307 Grade A N/A Plain N/A 400 $109.10 Add To Cart
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N/A 5/16-18 X 6 SQUARE HEAD BOLT A307 GRADE A N/A 5/16 N/A Coarse N/A 6 N/A A307 Grade A N/A Plain N/A 300 $96.75 Add To Cart
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N/A 3/8-16 X 3/4 SQUARE HEAD BOLT A307 GRADE A N/A 3/8 N/A Coarse N/A 3/4 N/A A307 Grade A N/A Plain N/A 1200 $112.71 Add To Cart
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N/A 3/8-16 X 1 SQUARE HEAD BOLT A307 GRADE A N/A 3/8 N/A Coarse N/A 1 N/A A307 Grade A N/A Plain N/A 1000 $104.25 Add To Cart
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N/A 3/8-16 X 1 1/4 SQUARE HEAD BOLT A307 GRADE A N/A 3/8 N/A Coarse N/A 1 1/4 N/A A307 Grade A N/A Plain N/A 800 $97.12 Add To Cart
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N/A 3/8-16 X 1 1/2 SQUARE HEAD BOLT A307 GRADE A N/A 3/8 N/A Coarse N/A 1 1/2 N/A A307 Grade A N/A Plain N/A 750 $103.97 Add To Cart
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N/A 3/8-16 X 1 3/4 SQUARE HEAD BOLT A307 GRADE A N/A 3/8 N/A Coarse N/A 1 3/4 N/A A307 Grade A N/A Plain N/A 650 $101.09 Add To Cart
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