McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    81 Products
    About Hex Nuts
    industrial info icon

    Choose a hex nut with the right profile, material, and strength for your application.

    Hex Nuts

    The most commonly used hex nuts, these are suitable for fastening most machinery and equipment.
    High-Strength Steel
    Image of Product. Front orientation. Hex Nuts. Hex Nuts.
    Image of Specification. Front orientation. Hex Nuts. Hex Nuts.
    Rated Grade 8, Grade C, or Class 10, these nuts are about 25% stronger than medium-strength steel nuts. They are commonly used to fasten components in valves, pumps, motors, and other high-stress applications. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.
    Material Certificate—Nuts include a report with a traceable lot number and a description of their chemical and physical properties.
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    Zinc-Yellow-Chromate-Plated Steel—With a more durable finish than clear zinc plating, these nuts are suitable for most wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.
    Black-Oxide Steel—Typically chosen for their appearance, these nuts have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Black Corrosion-Resistant-Coated Steel—The coating has been tested to extreme standards, including 1,000 hours of salt spray resistance, to hold up in wet and outdoor environments. Also known as black luster.
    Steel—Best for dry environments since moisture will cause these nuts to rust.
    Zinc-Flake-Coated Steel—The most durable zinc coating, zinc flake is a multilayer finish that resists wear for long-term rust protection. Similar to zinc yellow-chromate, it won't hold up to harsh chemicals like stainless steel can.
    Blue Dyed Steel—These metric-sized nuts have a distinctive blue color, so you can easily tell them apart from inch nuts.
    Thread Size
    Wd.,
    mm
    Ht.,
    mm
    Fastener Strength
    Grade/Class
    Specs.
    Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    M3 × 0.5 mm5.52.4Class 10
    		DIN 934Material Certificate
    		10090870A11300000
    M4 × 0.7 mm73.2Class 10
    		DIN 934—10090870A1140000
    M5 × 0.8 mm84Class 10
    		DIN 934—10090870A1010000
    M6 × 1 mm105.2Class 10
    		DIN 934—10090870A10200000
    M8 × 1.25 mm136.5Class 10
    		DIN 934—5090870A1030000
    M10 × 1.5 mm178Class 10
    		DIN 934—2590870A1040000
    M12 × 1.75 mm1910Class 10
    		DIN 934—2590870A10500000
    M14 × 2 mm2211Class 10
    		DIN 934—1090870A1060000
    M16 × 2 mm2413Class 10
    		DIN 934—1090870A1070000
    M18 × 2.5 mm2715Class 10
    		DIN 934—590870A10800000
    M20 × 2.5 mm3016Class 10
    		DIN 934—590870A1090000
    M22 × 2.5 mm3218Class 10
    		DIN 934—190870A1100000
    M24 × 3 mm3619Class 10
    		DIN 934—190870A1110000
    M27 × 3 mm4122Class 10
    		DIN 934—190870A11500000
    M30 × 3.5 mm4624Class 10
    		DIN 934—190870A1120000
    M36 × 4 mm5529Class 10
    		DIN 934Material Certificate
    		190870A11600000
    M42 × 4.5 mm6534Class 10
    		DIN 934—190870A11700000
     
    Zinc-Yellow-Chromate-Plated Steel
    M3 × 0.5 mm5.52.4Class 10
    		DIN 934—2592497A20000000
    M4 × 0.7 mm73.2Class 10
    		DIN 934—5092497A25000000
    M5 × 0.8 mm84Class 10
    		DIN 934—10092497A30000000
    M6 × 1 mm105Class 10
    		DIN 934—10092497A35000000
    M8 × 1.25 mm136.5Class 10
    		DIN 934Material Certificate
    		10092497A40000000
    M10 × 1.5 mm178Class 10
    		DIN 934—5092497A45000000
    M12 × 1.75 mm1910Class 10
    		DIN 934—2592497A50000000
    M14 × 2 mm2211Class 10
    		DIN 934—1092497A55000000
    M16 × 2 mm2413Class 10
    		DIN 934Material Certificate
    		1092497A60000000
    M18 × 2.5 mm2715Class 10
    		DIN 934—592497A65000000
    M20 × 2.5 mm3016Class 10
    		DIN 934Material Certificate
    		592497A70000000
    M22 × 2.5 mm3218Class 10
    		DIN 934—192497A7500000
    M24 × 3 mm3619Class 10
    		DIN 934—192497A8000000
    M30 × 3.5 mm4624Class 10
    		DIN 934Material Certificate
    		192497A8500000
    M36 × 4 mm5529Class 10
    		DIN 934—192497A90000000
     
    Black-Oxide Steel
    M4 × 0.7 mm73.2Class 10
    		DIN 934—10094166A1100000
    M5 × 0.8 mm84Class 10
    		DIN 934Material Certificate
    		5094166A1200000
    M6 × 1 mm105Class 10
    		DIN 934Material Certificate
    		5094166A1300000
    M8 × 1.25 mm136.5Class 10
    		DIN 934Material Certificate
    		2594166A1400000
    M10 × 1.5 mm178Class 10
    		DIN 934Material Certificate
    		1094166A1500000
    M12 × 1.75 mm1910Class 10
    		DIN 934Material Certificate
    		1094166A16000000
    M14 × 2 mm2211Class 10
    		DIN 934—594166A17000000
    M16 × 2 mm2413Class 10
    		DIN 934Material Certificate
    		594166A18000000
    M20 × 2.5 mm3016Class 10
    		DIN 934Material Certificate
    		194166A1900000
    M22 × 2.5 mm3218Class 10
    		DIN 934—194166A2100000
    M24 × 3 mm3619Class 10
    		DIN 934—194166A2200000
    M30 × 3.5 mm4624Class 10
    		DIN 934Material Certificate
    		194166A23000000
     
    Black Corrosion-Resistant-Coated Steel
    M6 × 1 mm105Class 10
    		DIN 934—1098797A22100000
    M8 × 1.25 mm136.5Class 10
    		DIN 934—1098797A22200000
    M10 × 1.5 mm178Class 10
    		DIN 934—1098797A22300000
    M12 × 1.75 mm1910Class 10
    		DIN 934—598797A2240000
     
    Steel
    M3 × 0.5 mm5.52.4Class 10
    		DIN 934—2590685A03700000
    M4 × 0.7 mm73.2Class 10
    		DIN 934—10090685A0390000
    M5 × 0.8 mm84Class 10
    		DIN 934—10090685A0410000
    M6 × 1 mm105Class 10
    		DIN 934—10090685A0430000
    M8 × 1.25 mm136.5Class 10
    		DIN 934—10090685A04500000
    M10 × 1.5 mm178Class 10
    		DIN 934—5090685A04600000
    M12 × 1.75 mm1910Class 10
    		DIN 934—2590685A1100000
    M14 × 2 mm2211Class 10
    		DIN 934—2590685A11500000
    M16 × 2 mm2413Class 10
    		DIN 934—1090685A1200000
    M18 × 2.5 mm2715Class 10
    		DIN 934—1090685A12500000
    M20 × 2.5 mm3016Class 10
    		DIN 934—1090685A13000000
    M22 × 2.5 mm3218Class 10
    		DIN 934—590685A10100000
    M24 × 3 mm3619Class 10
    		DIN 934—590685A06000000
    M27 × 3 mm4122Class 10
    		DIN 934—590685A10200000
    M30 × 3.5 mm4624Class 10
    		DIN 934—190685A0700000
    M36 × 4 mm5529Class 10
    		DIN 934—190685A0800000
    M42 × 4.5 mm6534Class 10
    		DIN 934—190685A10300000
    M48 × 5 mm7538Class 10
    		DIN 934—190685A10400000
     
    Zinc-Flake-Coated Steel
    M6 × 1 mm105Class 10
    		DIN 934—10093827A61100000
    M8 × 1.25 mm136.5Class 10
    		DIN 934—5093827A61200000
    M10 × 1.5 mm178Class 10
    		DIN 934—2593827A71300000
    M12 × 1.75 mm1910Class 10
    		DIN 934—2593827A71400000
     
    Blue Dyed Steel
    M6 × 1 mm105Class 10
    		DIN 934—5099899A2110000
    M8 × 1.25 mm136.5Class 10
    		DIN 934—5099899A21600000
    M10 × 1.5 mm178Class 10
    		DIN 934—2599899A22200000
    M12 × 1.75 mm1910Class 10
    		DIN 934—1099899A2270000
    M14 × 2 mm2211Class 10
    		DIN 934—1099899A23100000
    M16 × 2 mm2413Class 10
    		DIN 934—1099899A23600000
    M18 × 2.5 mm2715Class 10
    		DIN 934—199899A2010000
    M20 × 2.5 mm3016Class 10
    		DIN 934—199899A2430000
    M24 × 3 mm3619Class 10
    		DIN 934—199899A2470000
    M30 × 3.5 mm4624Class 10
    		DIN 934—199899A2510000
    M36 × 4 mm5529Class 10
    		DIN 934—199899A25500000
     
    back to top