Standard Hex Nuts Vs Heavy Hex Nuts
When selecting the right nut for your application, it's essential to ensure that it matches the bolt size perfectly. Properly matched fasteners provide superior performance and durability, preventing premature wear or failure. For instance, a mismatched nut and bolt may lead to structural instability, potentially causing severe damage or even injury.
The consequences of using incorrect fasteners can be hazardous. Inappropriate nuts or bolts might fail under stress, leading to machinery breakdowns. These failures can result in costly repairs and pose risks to personnel safety. Below, we'll explore the differences between standard hex nuts and heavy hex nuts to help you determine which type suits your needs best.
Table of Contents
- Standard Hex Nuts vs Heavy Hex Nuts
- Dimension Chart of Heavy Hex Nut
- Weight Chart of Hex Nuts
- Specifications of SS Heavy Hex Nuts
- Coating Processes for Heavy Hex Nuts
- Applications of Heavy Hex Nuts
- Benefits of Heavy Hex Bolts
- Standards and Grades of Hex Nuts
- Key Differences Between Standard and Heavy Hex Nuts
- Mechanical Properties of Heavy Hex Nuts vs Standard Hex Nuts per ASTM A563
- Advantages of Steel Heavy Hex Nuts
- Characteristics of Standard and Heavy Hex Nuts
Standard Hex Nuts vs Heavy Hex Nuts
| Standard Hex Nuts | Heavy Hex Nuts | |
|---|---|---|
 |
 |
|
| Shape | Same shape as heavy hex nuts | Same shape as standard hex nuts |
| Width Across Flats and Corners | Smaller for the same nominal size | Larger for the same nominal size |
| Thickness | Thinner for the same nominal size | Slightly thicker for the same nominal size |
| Diameter Across Flats | Smaller | 1/8†larger than standard hex nuts |
| Tool Requirements | Standard wrenches and sockets | Larger wrenches and sockets required |
| Proof Load Strength | Lower compared to heavy hex nuts | Higher compared to standard hex nuts |
Explore Dimensions and Weight Chart of Heavy Hex Nut
Heavy hex nuts are generally larger and wider than standard hex nuts. They come in various grades and designs, typically used for larger diameter bolts and high-strength applications.
Understanding the dimensions ensures accurate fitting and integration with other components, preventing issues like misalignment, damage, or failure. Knowing the weight is equally crucial in applications where structural integrity and safety are paramount, such as in construction and engineering projects.
Dimension Chart of Heavy Hex Nut
| Bolt Diameter | 1â„2 | 5â„8 | 3â„4 | 7â„8 | 13â„8 | 11â„2 | 1 | 11â„8 | 11â„4 | 15â„8 | 13â„4 | 31â„4 | 31â„2 | 2 | 21â„2 | 23â„4 | 3 | 33â„4 | 4 | |||
| F | Width Across Flats | Basic | 7â„8 | 11â„16 | 11â„4 | 17â„16 | 23â„16 | 23â„8 | 15â„8 | 113â„16 | 2 | 29â„16 | 23â„4 | 5 | 53â„8 | 31â„8 | 37â„8 | 41â„4 | 45â„8 | 53â„4 | 61â„8 | |
| Max | 0.875 | 1.062 | 1.25 | 1.438 | 2.188 | 2.375 | 1.625 | 1.812 | 2 | 2.562 | 2.75 | 5 | 5.375 | 3 | 3.875 | 4.25 | 4.625 | 5.75 | 6.125 | |||
| Min | 0.85 | 1.031 | 1.212 | 1.394 | 2.119 | 2.3 | 1.575 | 1.756 | 1.938 | 2.481 | 2.662 | 4.838 | 5.2 | 3 | 3.75 | 4.112 | 4.475 | 5.562 | 5.925 | |||
| C | Width Across Corners | Max | 1.01 | 1.227 | 1.443 | 1.66 | 2.526 | 2.742 | 1.876 | 2.093 | 2.309 | 2.959 | 3.175 | 5.774 | 6.207 | 4 | 4.474 | 4.907 | 5.34 | 6.64 | 7.073 | |
| Min | 0.969 | 1.175 | 1.382 | 1.589 | 2.416 | 2.622 | 1.796 | 2.002 | 2.209 | 2.828 | 3.035 | 5.515 | 5.928 | 3 | 4.275 | 4.688 | 5.102 | 6.341 | 6.755 | |||
| H | Thickness | Basic | 31â„64 | 39â„64 | 47â„64 | 55â„64 | 111â„32 | 115â„32 | 63â„64 | 17â„64 | 17â„32 | 119â„32 | 123â„32 | 33â„16 | 37â„16 | 131â„32 | 229â„64 | 245â„64 | 261â„64 | 311â„16 | 315â„16 | |
| Max | 0.504 | 0.631 | 0.758 | 0.885 | 1.378 | 1.505 | 1.012 | 1.139 | 1.251 | 1.632 | 1.759 | 3.252 | 3.506 | 2 | 2.505 | 2.759 | 3.013 | 3.76 | 4.014 | |||
| Min | 0.464 | 0.587 | 0.71 | 0.833 | 1.31 | 1.433 | 0.956 | 1.079 | 1.187 | 1.556 | 1.679 | 3.124 | 3.37 | 2 | 2.401 | 2.647 | 2.893 | 3.616 | 3.862 | |||
| Weight(lbs.) | 0.07 | 0.12 | 0.2 | 0.3 | 1.02 | 1.31 | 0.43 | 0.59 | 0.79 | 1.62 | 2.04 | 11.94 | 15.26 | 3 | 5.64 | 7.38 | 9.5 | 18.12 | 21.8 | |||
| Part Numbers | A563A | Import | Plain | 11729 | 11731 | 11733 | 11735 | 11743 | 11745 | 11737 | 11739 | 11741 | 17750 | 11747 | 18395 | 18495 | # | 11753 | 15864 | 15863 | – | 11755 |
| Galv. | 11730 | 11732 | 11734 | 11736 | 11744 | 11746 | 11738 | 11740 | 11742 | 17751 | 11748 | – | – | # | 11754 |  16041 | 16042 | – | 11756 | |||
| A1942H | Domestic | Plain | – | 16358 | 16360 | 16362 | 16374 | 16378 | 16364 | 16366 | 16370 | 16380 | 16384 | – | – | # | 16398 | 16400 | 16402 | – | 16404 | |
| Galv. | – | 16359 | 16361 | 16363 | – | – | 16365 | – | – | 16381 | 16385 | – | – | # | 16399 | 16401 | 16403 | – | 16405 | |||
| Import | Plain | 11761 | 11763 | 11765 | 11767 | 11775 | 11777 | 11769 | 11771 | 11773 | 11779 | 12549 | – | – | # | 12553 | 12555 | 12601 | – | – | ||
| Galv. | 11762 | 11764 | 11766 | 11768 | 11776 | 11778 | 11770 | 11772 | 11774 | 11780 | 12550 | – | – | # | 12554 | 12556 | 12602 | – | – | |||
| A563DH | Domestic | Plain | 16356 | – | – | – | – | – | – | – | 16380 | 16384 | – | – | # | 16398 | 16400 | 16402 | – | 16404 | ||
| Galv. | 18345 | 18346 | 18347 | 18348 | 16375 | 16379 | 18349 | 16367 | 16371 | 16381 | 16385 | – | – | # | 16399 | 16401 | 16403 | – | 16405 | |||
Weight Chart of Hex Nuts
| METRIC RANGE – DIMENSION (mm) AND WEIGHT (Kg) PER 100 PIECES | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | M52 | M56 | M60 | M64 | M68 | M72 | M76 | M80 | M85 | |
| S | Min | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 | 26.67 | 29.67 | 31.61 | 35.38 | 40.38 | 45.38 | 49.26 | 54.26 | 59.26 | 64.26 | 69.26 | 74.26 | 79.26 | 84.15 | 89.13 | 94.13 | 99.13 | 104.13 | 109.13 | 114.13 | 119.13 |
| Max | 13 | 17 | 19 | 22 | 24 | 27 | 30 | 32 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | |
| e | Min | 14.38 | 18.9 | 21.1 | 24.49 | 26.75 | 30.14 | 33.53 | 35.72 | 39.98 | 45.63 | 51.28 | 55.8 | 61.31 | 66.95 | 72.61 | 78.26 | 83.91 | 89.56 | 95.07 | 100.72 | 106.37 | 112.02 | 117.67 | 123.32 | 128.97 | 134.62 |
| Max | 15 | 19.6 | 21.9 | 25.4 | 27.7 | 31.1 | 34.6 | 36.9 | 41.5 | 47.3 | 53.1 | 57.7 | 63.5 | 69.3 | 75 | 80.8 | 86.5 | 92.4 | 98.1 | 103.9 | 109.7 | 115.5 | 121.25 | 127 | 132.8 | 138.6 | |
| m | Min | 7.64 | 9.64 | 11.57 | 13.57 | 15.57 | 17.57 | 19.48 | 21.48 | 23.48 | 26.48 | 29.48 | 32.38 | 35.38 | 38.38 | 41.38 | 44.38 | 47.38 | 51.38 | 55.26 | 59.26 | 63.26 | 67.26 | 71.26 | 75.26 | 79.26 | 84.13 |
| Max | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | 45 | 48 | 52 | 56 | 60 | 64 | 68 | 72 | 76 | 80 | 85 | |
| WEIGHT | 0.65 | 1.43 | 2.03 | 3.14 | 4.05 | 5.82 | 7.91 | 9.49 | 13.7 | 20 | 28.4 | 36.1 | 48.3 | 62.3 | 79.5 | 98.8 | 122 | 147 | 177 | 208 | 245 | 284 | 327 | 374 | 425 | 483 | |
Specification of SS Heavy Hex Nuts
- Metric Size Range: M3 – M48
- Imperial Size: 3/8 to 8"
- Surface Finish: Cadmium zinc plated, Galvanized, Hot dip Galvanized, Nickel Plated, Blackening
- Material: Stainless steel, Carbon, Alloy Steel, API 5L Copper, Duplex, Titanium
- Threads: Metric, BSW, BSF, UNC, UNF
- Test Certificates: EN 10204 / 3.1B, Raw Materials Certificate, Third Party Inspection Report, 100% Radiography Test Report
- Application: Heavy Industry, Marine, Ship Building, Oil & Gas Projects
Heavy Hex Nut Coating Process
- PTFE Coated
- Hot Dip galvanized
- Yellow Zinc Plated
- Blue Zinc Plated
- Black Zinc Plated
- Zinc Cobalt Plated
- Aluminium Zinc Flake Coated
- Black Phosphate
- Zinc Plated
- Nickel Plated
Heavy Hex Nuts Are Typically Made From High-grade Steel and Used With Heavy Bolts
High-grade steel provides ultimate strength and longevity to heavy hex nuts, especially in applications involving high bending loads and pressures. The combination of heavy hex nuts and bolts offers robust and protected connections, resisting harsh conditions and preventing damage to structures and equipment.
Uses & Applications of Heavy Hex Nuts
| Application Area | Uses and Examples |
|---|---|
| Construction | - Structural Steel - Heavy Machinery |
| Transportation | - Railroads - Automotive |
| Industrial | - Machinery - Pipelines |
| Energy Sector | - Oil and Gas - Renewable Energy |
| High-Strength Bolting | - High-Stress Fasteners |
| Mining | - Mining Equipment |
| Marine Applications | - Shipbuilding - Offshore Platforms |
Key Benefits of Heavy Hex Bolt
- Increased Strength: Capable of handling higher loads and stresses compared to standard hex nuts.
- Durability: More durable and resistant to deformation under load.
- Better Bearing Surface: Provides a larger surface area for enhanced stability.
Refer to Standard Hex Nut Sizes and Torque Chart
Standard hex nut sizes are defined by their minimum diameter and thread pitch, ensuring compatibility with corresponding bolts or screws. A torque chart for standard hex nuts specifies the tightening values needed to achieve precise clamping force in bolted joints. Accurate torque is vital for maintaining joint strength, ensuring that fasteners are neither too loose nor too tight.
Standard & Grades of Hex Nuts
| Material | Standards | Grades |
|---|---|---|
| Stainless Steel Hex Nuts | ASTM / ASME A/SA 193 / 194 | B 8 (304), B 8C (SS 347), B 8M (SS 316), B 8 T (SS 321), A 2, A 4 |
| Nickel Alloy Hex Nuts | ASTM / ASME SB 160 / 164 / 425 / 166 / 446 / 574 / 472 | UNS 2200 (NICKEL 200) / UNS 2201 (NICKEL 201), UNS 4400 (MONEL 400), UNS 8825 (INCONEL 825), UNS 6600 (INCONEL 600) / UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276), UNS 8020 (ALLOY 20 / 20 CB 3) |
| Alloy Steel Hex Nuts | ASTM / ASME A/SA 193 / 194 GR | B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M |
Standard Hex Nuts Have Smaller Widths Compared to Heavy Hex Nuts
Heavy hex nuts have larger widths across the flats and corners and are slightly thicker than standard hex nuts. Their robust design allows them to bear significantly more weight compared to standard hex nuts.
Differences Between Standard Hex Nuts and Heavy Hex Nuts
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