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Made in North America
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Hex Cap Screws

Hex Cap Screws

Also called hex head cap screws, these fasteners have a six-sided head with a wide underside to spread loads evenly across surfaces.

Steel

Steel provides strength for everyday fastening applications. These screws are magnetic.

Steel — Plain

Grade 2

1/4"-20

5/16"-18

3/8"-16

7/16"-14

1/2"-13

5/8"-11

3/4"-10

Grade B7

1/4"-20

5/16"-18

3/8"-16

7/16"-14

1/2"-13

5/8"-11

3/4"-10

7/8"-9

1"-8

Steel — Black Oxide

Grade 5

1/4"-20

1/4"-28

5/16"-18

5/16"-24

3/8"-16

3/8"-24

7/16"-14

7/16"-20

1/2"-13

1/2"-20

9/16"-12

9/16"-18

5/8"-11

5/8"-18

3/4"-10

3/4"-16

7/8"-9

7/8"-14

1"-8

1"-14

1 1/8"-7

1 1/4"-7

1 1/2"-6

1 1/2"-12

Grade 5 (Made in North America)

1/4"-20

1/4"-28

5/16"-18

5/16"-24

3/8"-16

3/8"-24

7/16"-14

7/16"-20

1/2"-13

1/2"-20

9/16"-12

9/16"-18

5/8"-11

5/8"-18

3/4"-10

3/4"-16

7/8"-9

7/8"-14

1"-8

1"-14

1 1/8"-7

1 1/4"-7

1 1/4"-12

Grade 8

1/4"-20

1/4"-28

5/16"-18

5/16"-24

3/8"-16

3/8"-24

7/16"-14

7/16"-20

1/2"-13

1/2"-20

9/16"-12

9/16"-18

5/8"-11

5/8"-18

3/4"-10

3/4"-16

7/8"-9

7/8"-14

1"-8

1"-14

1 1/8"-7

1 1/8"-12

1 1/4"-7

1 1/4"-12

1 1/2"-6

1 1/2"-12

Grade 8 (Made in North America)

1/4"-20

1/4"-28

5/16"-18

5/16"-24

3/8"-16

3/8"-24

7/16"-14

7/16"-20

1/2"-13

1/2"-20

9/16"-12

9/16"-18

5/8"-11

5/8"-18

3/4"-10

3/4"-16

7/8"-9

7/8"-14

1"-8

1"-14

1 1/8"-7

1 1/8"-12

1 1/4"-7

1 1/4"-12

Class 8.8

M4, 0.7 mm Thread Pitch

M5, 0.8 mm Thread Pitch

M6, 1 mm Thread Pitch

M7, 1 mm Thread Pitch

M8, 1 mm Thread Pitch

M8, 1.25 mm Thread Pitch

M10, 1.25 mm Thread Pitch

M10, 1.5 mm Thread Pitch

M12, 1.5 mm Thread Pitch

M12, 1.75 mm Thread Pitch

M14, 1.5 mm Thread Pitch

M14, 2 mm Thread Pitch

M16, 1.5 mm Thread Pitch

M16, 2 mm Thread Pitch

M18, 2.5 mm Thread Pitch

M20, 2.5 mm Thread Pitch

M22, 2.5 mm Thread Pitch

M24, 3 mm Thread Pitch

M27, 3 mm Thread Pitch

M30, 3.5 mm Thread Pitch

M33, 3.5 mm Thread Pitch

M36, 4 mm Thread Pitch

Class 10.9

M6, 1 mm Thread Pitch

M8, 1 mm Thread Pitch

M8, 1.25 mm Thread Pitch

M10, 1.25 mm Thread Pitch

M10, 1.5 mm Thread Pitch

M12, 1.5 mm Thread Pitch

M12, 1.75 mm Thread Pitch

M14, 1.5 mm Thread Pitch

M14, 2 mm Thread Pitch

M16, 1.5 mm Thread Pitch

M16, 2 mm Thread Pitch

M18, 1.5 mm Thread Pitch

M18, 2.5 mm Thread Pitch

M20, 2.5 mm Thread Pitch

M24, 2 mm Thread Pitch

M24, 3 mm Thread Pitch

M27, 3 mm Thread Pitch

M30, 3.5 mm Thread Pitch

M33, 3.5 mm Thread Pitch

M36, 4 mm Thread Pitch

M42, 4.5 mm Thread Pitch

Steel — Zinc Plated

Grade 2

1/4"-20

5/16"-18

3/8"-16

7/16"-14

1/2"-13

5/8"-11

3/4"-10

Grade 5

1/4"-20

1/4"-28

5/16"-18

5/16"-24

3/8"-16

3/8"-24

7/16"-14

7/16"-20

1/2"-13

1/2"-20

9/16"-12

9/16"-18

5/8"-11

5/8"-18

3/4"-10

3/4"-16

7/8"-9

7/8"-14

1"-8

1"-14

1 1/8"-7

1 1/4"-7

1 1/2"-6

Grade 5 (Made in North America)

1/4"-20

1/4"-28

5/16"-18

5/16"-24

3/8"-16

3/8"-24

7/16"-14

7/16"-20

1/2"-13

1/2"-20

9/16"-12

9/16"-18

5/8"-11

5/8"-18

3/4"-10

3/4"-16

7/8"-9

7/8"-14

1"-8

1"-14

1 1/8"-7

1 1/4"-7

Grade 8

5/16"-18

3/8"-16

1/2"-13

5/8"-11

3/4"-10

7/8"-9

M30, 3.5 mm Thread Pitch

Grade 8 (Made in North America)

1/4"-20

1/4"-28

5/16"-18

5/16"-24

9/16"-12

9/16"-18

Grade A

1/4"-20

5/16"-18

3/8"-16

7/16"-14

1/2"-13

5/8"-11

3/4"-10

7/8"-9

1"-8

Class 8.8

M3, 0.5 mm Thread Pitch

M4, 0.7 mm Thread Pitch

M4, 1.5 mm Thread Pitch

M5, 0.8 mm Thread Pitch

M5, 1.75 mm Thread Pitch

M6, 1 mm Thread Pitch

M6, 3 mm Thread Pitch

M7, 1 mm Thread Pitch

M8, 1 mm Thread Pitch

M8, 1.25 mm Thread Pitch

M8, 1.75 mm Thread Pitch

M10, 1 mm Thread Pitch

M10, 1.25 mm Thread Pitch

M10, 1.5 mm Thread Pitch

M12, 1.25 mm Thread Pitch

M12, 1.5 mm Thread Pitch

M12, 1.75 mm Thread Pitch

M12, 2 mm Thread Pitch

M14, 1.5 mm Thread Pitch

M14, 2 mm Thread Pitch

M16, 2 mm Thread Pitch

M18, 1.75 mm Thread Pitch

M18, 2.5 mm Thread Pitch

M20, 2.5 mm Thread Pitch

M22, 2.5 mm Thread Pitch

M24, 3 mm Thread Pitch

M30, 3.5 mm Thread Pitch

Class 10.9

M6, 1 mm Thread Pitch

M12, 1.75 mm Thread Pitch

Steel — Zinc Yellow

Grade 8

1/4"-20

1/4"-28

5/16"-18

5/16"-24

3/8"-16

3/8"-24

7/16"-14

7/16"-20

1/2"-13

1/2"-20

9/16"-12

9/16"-18

5/8"-11

5/8"-18

3/4"-10

3/4"-16

7/8"-9

7/8"-14

1"-8

1"-14

1 1/8"-7

1 1/8"-12

1 1/4"-7

1 1/4"-12

1 1/2"-6

1 1/2"-12

Grade 8 (Made in North America)

1/4"-20

1/4"-28

5/16"-18

5/16"-24

3/8"-16

3/8"-24

7/16"-14

7/16"-20

1/2"-13

1/2"-20

9/16"-12

9/16"-18

5/8"-11

5/8"-18

3/4"-10

3/4"-16

7/8"-9

7/8"-14

1"-8

1"-14

1 1/8"-7

1 1/8"-12

1 1/4"-7

1 1/4"-12

Class 8.8

M5, 0.8 mm Thread Pitch

M12, 1.75 mm Thread Pitch

Class 10.9

M6, 1 mm Thread Pitch

M8, 1.25 mm Thread Pitch

M10, 1.5 mm Thread Pitch

M12, 1.75 mm Thread Pitch

M14, 2 mm Thread Pitch

M16, 2 mm Thread Pitch

M18, 2.5 mm Thread Pitch

M20, 2.5 mm Thread Pitch

M24, 3 mm Thread Pitch

Steel — Galvanized

Grade 2

1/4"-20

3/8"-16

1/2"-13

Grade A

1/2"-13

5/8"-11

Steel — Zinc Flake Coated

Grade 8

1/4"-20

5/16"-18

3/8"-16

7/16"-14

1/2"-13

5/8"-11

3/4"-10

Steel — Chrome Plated

Grade 5

1/4"-20

5/16"-18

5/16"-24

3/8"-16

3/8"-24

Steel — Blue Phosphate

Class 8.8

M6, 1 mm Thread Pitch

M8, 1.25 mm Thread Pitch

M10, 1.5 mm Thread Pitch

M12, 1.75 mm Thread Pitch

M16, 2 mm Thread Pitch

M20, 2.5 mm Thread Pitch

Steel — Passivated

Grade 8 (Made in North America)

1/4"-20

1/4"-28

5/16"-18

5/16"-24

3/8"-16

3/8"-24

7/16"-14

7/16"-20

1/2"-13

1/2"-20

9/16"-12

9/16"-18

5/8"-11

5/8"-18

3/4"-10

3/4"-16

7/8"-9

7/8"-14

1"-8

1"-14

Alloy Steel — Black Oxide

Grade 8

3/4"-10

1 1/8"-7

1 1/4"-7

1 1/2"-6

Stainless Steel

Stainless steel has a naturally corrosion-resistant surface that continues to protect the material from environmental contaminants even if scratched. It may be magnetic.

18-8 Stainless Steel

M36, 4 mm Thread Pitch

1/4"-20

1/4"-28

5/16"-18

5/16"-24

3/8"-16

3/8"-24

7/16"-14

7/16"-20

1/2"-13

1/2"-20

9/16"-12

9/16"-18

5/8"-11

5/8"-18

3/4"-10

3/4"-16

7/8"-9

1"-8

1 1/8"-7

1 1/4"-7

M3, 0.5 mm Thread Pitch

M4, 0.7 mm Thread Pitch

M5, 0.8 mm Thread Pitch

M6, 1 mm Thread Pitch

M8, 1.25 mm Thread Pitch

M10, 1.5 mm Thread Pitch

M12, 1.75 mm Thread Pitch

M14, 2 mm Thread Pitch

M16, 2 mm Thread Pitch

M20, 2.5 mm Thread Pitch

316 Stainless Steel

1/4"-20

1/4"-28

5/16"-18

3/8"-16

7/16"-14

1/2"-13

5/8"-11

3/4"-10

7/8"-9

1"-8

1 1/8"-7

1 1/4"-7

M3, 0.5 mm Thread Pitch

M4, 0.7 mm Thread Pitch

M5, 0.8 mm Thread Pitch

M6, 1 mm Thread Pitch

M8, 1.25 mm Thread Pitch

M10, 1.5 mm Thread Pitch

M12, 1.75 mm Thread Pitch

M14, 2 mm Thread Pitch

M16, 2 mm Thread Pitch

M18, 2.5 mm Thread Pitch

M20, 2.5 mm Thread Pitch

M24, 3 mm Thread Pitch

Nylon

Lightweight, corrosion-resistant nylon is commonly used in electronics applications because it is nonmagnetic and nonconductive. It may absorb moisture, causing dimensional changes.

1/4"-20

5/16"-18

3/8"-16

1/2"-13

5/8"-11

M4, 0.7 mm Thread Pitch

M5, 0.8 mm Thread Pitch

M6, 1 mm Thread Pitch

M8, 1.25 mm Thread Pitch

M10, 1.5 mm Thread Pitch

Brass

Recognizable by its bright yellow color, brass is a relatively soft, corrosion-resistant material that is nonmagnetic.

1/4"-20

5/16"-18

3/8"-16

1/2"-13

M5, 0.8 mm Thread Pitch

M6, 1 mm Thread Pitch

M8, 1.25 mm Thread Pitch

M10, 1.5 mm Thread Pitch

M12, 1.75 mm Thread Pitch

Bronze

Bronze is a corrosion-resistant, nonmagnetic metal that conducts heat and electricity.

1/4"-20

5/16"-18

3/8"-16

1/2"-13

Aluminum

At roughly 1/3 the weight of steel, aluminum is a strong, corrosion-resistant metal commonly used for its lightweight properties. It is nonmagnetic.

1/4"-20

5/16"-18

3/8"-16

1/2"-13

Flanged Head

The washer-like flange under the hex head spreads out the fastening force.

Hex Drive — Smooth Flange

Grade 8 Black Oxide Alloy Steel

1/4"-20

5/16"-18

3/8"-16

7/16"-14

1/2"-13

1/2"-20

5/8"-11

5/8"-18

3/4"-10

Hex Drive — Serrated Flange

Grade 5 Zinc Plated Steel

1/4"-20

5/16"-18

3/8"-16

1/2"-13

Twelve Point Drive — Smooth Flange

A574 Black Oxide Alloy Steel

1/4"-20

1/4"-28

5/16"-18

5/16"-24

3/8"-16

3/8"-24

7/16"-14

1/2"-13

1/2"-20

5/8"-11

3/4"-10

Self-Sealing

A silicone rubber O-ring sits in a groove below the screw head and presses against surfaces when installed to create a leak-resistant seal against air, lubricants, and other liquids and gases.

18-8 Stainless Steel

1/4"-20

5/16"-18

3/8"-16

1/2"-13

Assortments

Blue Phosphate Alloy Steel

Zinc Flake Coated Steel

Zinc Plated Steel