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Machine screw nuts are typically a six-sided internally threaded fastener with a flat top and chamfered corners. They are designed for use with machine screws.

Machine screw nuts are also available as a four-sided, internally threaded fastener with a flat top and bottom, without chamfer. However, user interest in square machine screw nuts has declined significantly during the past several years.
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Diameter

Pitch

Coarse Fine

Material

18-8 Stainless Carbon Steel

Finish

Plain Zinc Plated

Item #

Item Name

Type

Diameter

Pitch

Material

Finish

Package Quantity

Web Price

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N/A #2-56 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #2 N/A Coarse N/A Carbon Steel N/A Zinc Plated N/A 5000 $101.25 Add To Cart
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N/A #2-56 MACHINE SCREW NUT 18-8 STAINLESS N/A Hex N/A #2 N/A Coarse N/A 18-8 Stainless N/A Plain N/A 10000 $112.25 Add To Cart
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N/A #2-64 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #2 N/A Fine N/A Carbon Steel N/A Zinc Plated N/A 100 $2.05 Add To Cart
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N/A #2-56 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #2 N/A Coarse N/A Carbon Steel N/A Zinc Plated N/A 30000 $282.75 Add To Cart
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N/A #2-64 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #2 N/A Fine N/A Carbon Steel N/A Zinc Plated N/A 30000 $282.75 Add To Cart
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N/A #2-64 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #2 N/A Fine N/A Carbon Steel N/A Zinc Plated N/A 10000 $94.25 Add To Cart
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N/A #2-56 MACHINE SCREW NUT 18-8 STAINLESS N/A Hex N/A #2 N/A Coarse N/A 18-8 Stainless N/A Plain N/A 100 $2.10 Add To Cart
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N/A #3-48 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #3 N/A Coarse N/A Carbon Steel N/A Zinc Plated N/A 100 $1.55 Add To Cart
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N/A #3-48 MACHINE SCREW NUT 18-8 STAINLESS N/A Hex N/A #3 N/A Coarse N/A 18-8 Stainless N/A Plain N/A 10000 $117.25 Add To Cart
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N/A #3-56 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #3 N/A Fine N/A Carbon Steel N/A Zinc Plated N/A 500 $12.25 Add To Cart
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N/A #3-48 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #3 N/A Coarse N/A Carbon Steel N/A Zinc Plated N/A 30000 $217.50 Add To Cart
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N/A #3-48 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #3 N/A Coarse N/A Carbon Steel N/A Zinc Plated N/A 10000 $72.50 Add To Cart
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N/A #3-56 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #3 N/A Fine N/A Carbon Steel N/A Zinc Plated N/A 30000 $219.00 Add To Cart
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N/A #3-56 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #3 N/A Fine N/A Carbon Steel N/A Zinc Plated N/A 10000 $73.00 Add To Cart
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N/A #3-48 MACHINE SCREW NUT 18-8 STAINLESS N/A Hex N/A #3 N/A Coarse N/A 18-8 Stainless N/A Plain N/A 100 $2.17 Add To Cart
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N/A #4-40 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #4 N/A Coarse N/A Carbon Steel N/A Zinc Plated N/A 5000 $66.25 Add To Cart
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N/A #4-40 HEX MACHINE SCREW NUT (SMALL PATTERN) ZINC PLATED N/A Hex N/A #4 N/A Coarse N/A Carbon Steel N/A Zinc Plated N/A 5000 $53.75 Add To Cart
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N/A #4-40 MACHINE SCREW NUT 18-8 STAINLESS N/A Hex N/A #4 N/A Coarse N/A 18-8 Stainless N/A Plain N/A 10000 $170.00 Add To Cart
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N/A #4-40 HEX MACHINE SCREW NUT N/A Hex N/A #4 N/A Coarse N/A Carbon Steel N/A Plain N/A 35000 $405.12 Add To Cart
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N/A #4-40 HEX MACHINE SCREW NUT (SMALL PATTERN) N/A Hex N/A #4 N/A Coarse N/A Carbon Steel N/A Plain N/A 25000 $177.50 Add To Cart
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N/A #4-40 MACHINE SCREW NUT (SMALL PATTERN) 18-8 STAINLESS N/A Hex N/A #4 N/A Coarse N/A 18-8 Stainless N/A Plain N/A 10000 $94.75 Add To Cart
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N/A #4-40 HEX MACHINE SCREW NUT ZINC PLATED N/A Hex N/A #4 N/A Coarse N/A Carbon Steel N/A Zinc Plated N/A 35000 $240.62 Add To Cart
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N/A #4-40 HEX MACHINE SCREW NUT (SMALL PATTERN) ZINC PLATED N/A Hex N/A #4 N/A Coarse N/A Carbon Steel N/A Zinc Plated N/A 100000 $527.50 Add To Cart
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N/A #4-40 HEX MACHINE SCREW NUT (SMALL PATTERN) N/A Hex N/A #4 N/A Coarse N/A Carbon Steel N/A Plain N/A 100 $1.47 Add To Cart
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N/A #4-40 HEX MACHINE SCREW NUT N/A Hex N/A #4 N/A Coarse N/A Carbon Steel N/A Plain N/A 100 $2.27 Add To Cart
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