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Square nuts are four-sided, internally threaded fasteners, mated with bolts, studs, screws, and other externally threaded products. The addition of the square nut ensures that the bolt, etc., stays in place.

Square nuts are most commonly mated with square bolts. Square nuts offer a greater surface area than do hex nuts, and therefore provide greater adherence. A disadvantage is that they require more effort to tighten.
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Diameter

Pitch

Coarse

Material

SAE Grade 2

Finish

Galvanized Plain Zinc Plated

Item #

Item Name

Diameter

Pitch

Material

Finish

Package Quantity

Web Price

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N/A 1/4-20 SQUARE NUT GRADE 2 N/A 1/4 N/A Coarse N/A SAE Grade 2 N/A Plain N/A 5000 $107.25 Add To Cart
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N/A 1/4-20 SQUARE NUT GRADE 2 ZINC PLATED N/A 1/4 N/A Coarse N/A SAE Grade 2 N/A Zinc Plated N/A 250 $8.50 Add To Cart
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N/A 1/4-20 SQUARE NUT GRADE 2 GALVANIZED N/A 1/4 N/A Coarse N/A SAE Grade 2 N/A Galvanized N/A 250 $9.31 Add To Cart
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N/A 5/16-18 SQUARE NUT GRADE 2 N/A 5/16 N/A Coarse N/A SAE Grade 2 N/A Plain N/A 2500 $108.81 Add To Cart
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N/A 5/16-18 SQUARE NUT GRADE 2 ZINC PLATED N/A 5/16 N/A Coarse N/A SAE Grade 2 N/A Zinc Plated N/A 250 $17.31 Add To Cart
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N/A 5/16-18 SQUARE NUT GRADE 2 GALVANIZED N/A 5/16 N/A Coarse N/A SAE Grade 2 N/A Galvanized N/A 250 $18.94 Add To Cart
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N/A 3/8-16 SQUARE NUT GRADE 2 N/A 3/8 N/A Coarse N/A SAE Grade 2 N/A Plain N/A 1500 $95.21 Add To Cart
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N/A 3/8-16 SQUARE NUT GRADE 2 ZINC PLATED N/A 3/8 N/A Coarse N/A SAE Grade 2 N/A Zinc Plated N/A 100 $10.10 Add To Cart
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N/A 3/8-16 SQUARE NUT GRADE 2 GALVANIZED N/A 3/8 N/A Coarse N/A SAE Grade 2 N/A Galvanized N/A 100 $11.05 Add To Cart
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N/A 7/16-14 SQUARE NUT GRADE 2 ZINC PLATED N/A 7/16 N/A Coarse N/A SAE Grade 2 N/A Zinc Plated N/A 100 $17.50 Add To Cart
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N/A 7/16-14 SQUARE NUT GRADE 2 GALVANIZED N/A 7/16 N/A Coarse N/A SAE Grade 2 N/A Galvanized N/A 100 $18.43 Add To Cart
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N/A 1/2-13 SQUARE NUT GRADE 2 N/A 1/2 N/A Coarse N/A SAE Grade 2 N/A Plain N/A 750 $104.06 Add To Cart
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N/A 1/2-13 SQUARE NUT GRADE 2 ZINC PLATED N/A 1/2 N/A Coarse N/A SAE Grade 2 N/A Zinc Plated N/A 50 $11.04 Add To Cart
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N/A 1/2-13 SQUARE NUT GRADE 2 GALVANIZED N/A 1/2 N/A Coarse N/A SAE Grade 2 N/A Galvanized N/A 50 $12.10 Add To Cart
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N/A 5/8-11 SQUARE NUT GRADE 2 N/A 5/8 N/A Coarse N/A SAE Grade 2 N/A Plain N/A 400 $103.71 Add To Cart
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N/A 5/8-11 SQUARE NUT GRADE 2 ZINC PLATED N/A 5/8 N/A Coarse N/A SAE Grade 2 N/A Zinc Plated N/A 50 $20.63 Add To Cart
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N/A 5/8-11 SQUARE NUT GRADE 2 GALVANIZED N/A 5/8 N/A Coarse N/A SAE Grade 2 N/A Galvanized N/A 50 $22.59 Add To Cart
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N/A 3/4-10 SQUARE NUT GRADE 2 N/A 3/4 N/A Coarse N/A SAE Grade 2 N/A Plain N/A 250 $92.61 Add To Cart
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N/A 3/4-10 SQUARE NUT GRADE 2 ZINC PLATED N/A 3/4 N/A Coarse N/A SAE Grade 2 N/A Zinc Plated N/A 25 $14.73 Add To Cart
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N/A 3/4-10 SQUARE NUT GRADE 2 GALVANIZED N/A 3/4 N/A Coarse N/A SAE Grade 2 N/A Galvanized N/A 25 $16.13 Add To Cart
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N/A 7/8-9 SQUARE NUT GRADE 2 N/A 7/8 N/A Coarse N/A SAE Grade 2 N/A Plain N/A 175 $107.21 Add To Cart
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N/A 7/8-9 SQUARE NUT GRADE 2 ZINC PLATED N/A 7/8 N/A Coarse N/A SAE Grade 2 N/A Zinc Plated N/A 25 $24.31 Add To Cart
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N/A 7/8-9 SQUARE NUT GRADE 2 GALVANIZED N/A 7/8 N/A Coarse N/A SAE Grade 2 N/A Galvanized N/A 25 $26.53 Add To Cart
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N/A 1-8 SQUARE NUT GRADE 2 N/A 1 N/A Coarse N/A SAE Grade 2 N/A Plain N/A 125 $111.38 Add To Cart
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N/A 1-8 SQUARE NUT GRADE 2 ZINC PLATED N/A 1 N/A Coarse N/A SAE Grade 2 N/A Zinc Plated N/A 25 $35.72 Add To Cart
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