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Lock Nuts

Manufacturer, Exporter & Supplier of Lock Nuts

Lock Nuts

Leading producer of premium lock nuts made to comply with ASTM, DIN, ISO, and BS standards worldwide is GIC Fasteners. Our lock nuts are designed to provide exceptional performance and dependability, guaranteeing safe fastening in tough situations in the equipment, construction, automotive, and aerospace sectors. GIC Fasteners is dedicated to providing precise and long-lasting Lock Nuts, and it offers a wide selection of both standard and bespoke options to meet your needs. You can rely on GIC Fasteners to provide outstanding quality and conformity to international standards.

Inconel Lock Nuts Manufacturer
Stainless Steel Lock Nuts Supplier
Hastelloy Lock Nuts Exporter

A leading manufacturer of high-quality lock nuts, GIC Fasteners offers reliable and safe fastening solutions for a variety of industrial uses. Our lock nuts are designed to withstand torque and vibration without loosening, guaranteeing dependable and long-lasting operation. Our Lock Nuts are made using premium materials and cutting-edge technology to withstand the demanding requirements of the construction, automobile, aerospace, and equipment sectors. Because we at GIC Fasteners are dedicated to accuracy and quality, we provide both conventional and customized lock nut configurations to satisfy your unique needs.

By selecting GIC Fasteners, you are collaborating with a dependable professional committed to providing excellent goods and customer support. The highest return on your investment is guaranteed by our quick response times and cheap prices. Our crew is prepared to help, whether you require a large-scale order or specific Lock Nuts for a customized application. Get a customized price and discuss your needs with us by contacting sales@gicfasteners.com now. Experience the quality that distinguishes GIC Fasteners in the market by putting your trust in us for all of your lock nut needs.

Lock Nuts Specifications​

Standard : DIN, ASTM, BS, ISO, JIS, IS, GB, IS 4190 and all other International Standards
Length : 3 mm to 200 mm
Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Threads: : BSF, UNF METRIC, UNC, BSW or as required
Finish : Plain, black, zinc plated (Cr,3+), zinc plated(Cr,6+), hot dipped galvanized, dacromet, nickel plated, cadmium plated, etc.
Forming : Hot & Cold Forged
Variants : Fully Threaded Lock Nuts, Partial Threaded Lock Nuts, Metric Lock Nuts, Imperial Lock Nuts
Coatings : PTFE (Teflon), Hot Dip Galvanizing, Aluminum Zinc Flake, Zinc Phosphating, Manganese Phosphating, Metallic Zinc, Nickel Bolts Plating, Chrome Plating, Cadmium Plating, Silver Plating, Tin Plating

Finished Hex Lock Nuts Dimension Chart

Lock Nuts Dimensions Drawing
Nominal Size F C H Weight Each (lbs.)
Width Across Flats Width Across Corners Thickness
Basic Max Min Max Min Basic Max Min
1⁄2 3⁄4 0.750 0.736 0.866 0.840 7⁄16 0.448 0.427 0.04
5⁄8 15⁄16 0.938 0.922 1.083 1.051 35⁄64 0.559 0.535 0.07
3⁄4 11⁄8 1.125 1.088 1.299 1.240 41⁄64 0.665 0.617 0.12
7⁄8 15⁄16 1.312 1.269 1.516 1.447 3⁄4 0.776 0.724 0.19
1 11⁄2 1.500 1.450 1.732 1.653 55⁄64 0.887 0.831 0.28
11⁄8 111⁄16 1.688 1.631 1.949 1.859 31⁄32 0.999 0.939 0.40
11⁄4 17⁄8 1.875 1.812 2.165 2.066 11⁄16 1.094 1.030 0.54
13⁄8 21⁄16 2.062 1.994 2.382 2.273 111⁄64 1.206 1.138 0.73
11⁄2 21⁄4 2.250 2.175 2.598 2.480 19⁄32 1.317 1.245 0.94
Dimensions per ASME B18.2.2 1987 (1999)

Heavy Hex Lock Nuts Dimension Chart

Nominal Size F C H Weight Each (lbs.)
Width Across Flats Width Across Corners Thickness
Basic Max Min Max Min Basic Max Min
1⁄2 7⁄8 0.875 0.850 1.010 0.969 31⁄64 0.504 0.464 0.07
5⁄8 11⁄16 1.062 1.031 1.227 1.175 39⁄64 0.631 0.587 0.12
3⁄4 11⁄4 1.250 1.212 1.443 1.382 47⁄64 0.758 0.710 0.20
7⁄8 17⁄16 1.438 1.394 1.660 1.589 55⁄64 0.885 0.833 0.30
1 15⁄8 1.625 1.575 1.876 1.796 63⁄64 1.012 0.956 0.43
11⁄8 113⁄16 1.812 1.756 2.093 2.002 17⁄64 1.139 1.079 0.59
11⁄4 2 2.000 1.938 2.309 2.209 17⁄32 1.251 1.187 0.79
13⁄8 23⁄16 2.188 2.119 2.526 2.416 111⁄32 1.378 1.310 1.02
11⁄2 23⁄8 2.375 2.300 2.742 2.622 115⁄32 1.505 1.433 1.31
15⁄8 29⁄16 2.562 2.481 2.959 2.828 119⁄32 1.632 1.556 1.62
13⁄4 23⁄4 2.750 2.662 3.175 3.035 123⁄32 1.759 1.679 2.04
17⁄8 215⁄16 2.938 2.844 3.392 3.242 127⁄32 1.886 1.802 2.41
2 31⁄8 3.125 3.025 3.608 3.449 131⁄32 2.013 1.925 2.99
21⁄4 31⁄2 3.500 3.388 4.041 3.862 213⁄64 2.251 2.155 4.19
21⁄2 37⁄8 3.875 3.750 4.474 4.275 229⁄64 2.505 2.401 5.64
23⁄4 41⁄4 4.250 4.112 4.907 4.688 245⁄64 2.759 2.647 7.38
3 45⁄8 4.625 4.475 5.340 5.102 261⁄64 3.013 2.893 9.50
31⁄4 5 5.000 4.838 5.774 5.515 33⁄16 3.252 3.124 11.94
31⁄2 53⁄8 5.375 5.200 6.207 5.928 37⁄16 3.506 3.370 15.26
33⁄4 53⁄4 5.750 5.562 6.640 6.341 311⁄16 3.760 3.616 18.12
4 61⁄8 6.125 5.925 7.073 6.755 315⁄16 4.014 3.862 21.80
Dimensions per ASME B18.2.2 1987 (1999)

Stainless Steel Lock Nuts - Grades

  • Stainless Steel 304 Lock Nuts
  • Stainless Steel 304L Lock Nuts
  • Stainless Steel 304H Lock Nuts
  • Stainless Steel 310 Lock Nuts
  • Stainless Steel 310S Lock Nuts
  • Stainless Steel 310H Lock Nuts
  • Stainless Steel 316 Lock Nuts
  • Stainless Steel 316L Lock Nuts
  • Stainless Steel 316Ti Lock Nuts
  • Stainless Steel 317 Lock Nuts
  • Stainless Steel 317L Lock Nuts
  • Stainless Steel 321 Lock Nuts
  • Stainless Steel 321H Lock Nuts
  • Stainless Steel 347 Lock Nuts
  • Stainless Steel 347H Lock Nuts
  • Stainless Steel 904L Lock Nuts
  • Stainless Steel 410 Lock Nuts
  • Stainless Steel 446 Lock Nuts
  • SMO 254 Lock Nuts
  • 17-4 PH Stainless Steel Lock Nuts

Duplex Steel Lock Nuts- Grades

  • UNS S32205 Lock Nuts
  • UNS S31803 Lock Nuts

Super Duplex Steel Lock Nuts - Grades

  • UNS S32750 Lock Nuts
  • UNS S32760 Lock Nuts

Inconel/Incoloy Lock Nuts - Grades

  • Inconel 600 Lock Nuts
  • Inconel 601 Lock Nuts
  • Inconel 625 Lock Nuts
  • Inconel 718 Lock Nuts
  • Incoloy 800 Lock Nuts
  • Incoloy 825 Lock Nuts

Monel Lock Nuts - Grades

  • Monel 400 Lock Nuts
  • Monel K500 Lock Nuts

Nickel Lock Nuts - Grades

  • Nickel 200 Lock Nuts
  • Nickel 201 Lock Nuts

Hastelloy Lock Nuts - Grades

  • Hastelloy C276 Lock Nuts
  • Hastelloy C22 Lock Nuts
  • Hastelloy B2 Lock Nuts
  • Hastelloy B3 Lock Nuts
  • Hastelloy X Lock Nuts

Titanium Lock Nuts - Grades

  • Titanium Grade 2 Lock Nuts
  • Titanium Grade 5 Lock Nuts

Tantalum Lock Nuts- Grades

  • UNS R05200 Lock Nuts
  • UNS R05252 Lock Nuts
  • UNS R05255 Lock Nuts
  • UNS R05400 Lock Nuts

Cupro Nickel Lock Nuts - Grades

  • CuNi 90/10 Lock Nuts
  • CuNi 70/30 Lock Nuts

Copper Lock Nuts - Grades

  • UNS C11000 Lock Nuts
  • UNS C10100 Lock Nuts
  • UNS C10200 Lock Nuts
  • UNS C12000 Lock Nuts
  • UNS C12200 Lock Nuts

Carbon Steel Lock Nuts - Grades

  • Carbon Steel AISI 1018 Lock Nuts
  • Carbon Steel AISI 1020 Lock Nuts
  • Carbon Steel AISI 1040 Lock Nuts
  • Carbon Steel AISI 1045 Lock Nuts

Alloy Steel Lock Nuts - Grades

  • Alloy Steel 4130 Lock Nuts
  • Alloy Steel 4140 Lock Nuts
  • Alloy Steel 4340 Lock Nuts
  • Alloy Steel 8620 Lock Nuts
  • ASTM A193 Alloy Steel Gr B7 Lock Nuts
  • ASTM A193 Alloy Steel Gr B7M Lock Nuts
  • ASTM A320 Alloy Steel Gr L7 Lock Nuts
  • ASTM A320 Alloy Steel Gr L7M Lock Nuts
  • ASTM A320 Alloy Steel Gr L43 Lock Nuts
  • ASTM A320 Alloy Steel Gr L43 Lock Nuts
  • ISO 898-1 Alloy Steel Gr 8.8 Lock Nuts
  • ISO 898-1 Alloy Steel Gr 10.9 Lock Nuts
  • ISO 898-1 Alloy Steel Gr 12.9 Lock Nuts

Brass Lock Nuts - Grades

  • UNS C21000 Lock Nuts
  • UNS C22000 Lock Nuts
  • UNS C22600 Lock Nuts
  • UNS C23000 Lock Nuts
  • UNS C24000 Lock Nuts
  • UNS C26000 Lock Nuts
  • UNS C26800 Lock Nuts
  • UNS C27000 Lock Nuts
  • UNS C27200 Lock Nuts
  • UNS C28000 Lock Nuts
  • UNS C33000 Lock Nuts
  • UNS C33500 Lock Nuts
  • UNS C34000 Lock Nuts
  • UNS C34200 Lock Nuts
  • UNS C35300 Lock Nuts
  • UNS C35600 Lock Nuts

Aluminium Lock Nuts - Grades

  • Aluminium Alloy 1050 Lock Nuts
  • Aluminium Alloy 1060 Lock Nuts
  • Aluminium Alloy 1060 Lock Nuts
  • Aluminium Alloy 1070 Lock Nuts
  • Aluminium Alloy 1080 Lock Nuts
  • Aluminium Alloy 1100 Lock Nuts
  • Aluminium Alloy 1145 Lock Nuts
  • Aluminium Alloy 2011 Lock Nuts
  • Aluminium Alloy 2014 Lock Nuts
  • Aluminium Alloy 2017 Lock Nuts
  • Aluminium Alloy 2024 Lock Nuts
  • Aluminium Alloy 2090 Lock Nuts
  • Aluminium Alloy 3003 Lock Nuts
  • Aluminium Alloy 5052 Lock Nuts
  • Aluminium Alloy 5083 Lock Nuts
  • Aluminium Alloy 6061 Lock Nuts
  • Aluminium Alloy 6063 Lock Nuts
  • Aluminium Alloy 6066 Lock Nuts
  • Aluminium Alloy 6082 Lock Nuts
  • Aluminium Alloy 7050 Lock Nuts
  • Aluminium Alloy 7075 Lock Nuts

Zirconium Lock Nuts - Grades

  • UNS R60700 Lock Nuts
  • UNS R60702 Lock Nuts
  • UNS R60704 Lock Nuts
  • UNS R60705 Lock Nuts
  • UNS R60706 Lock Nuts

Beryllium Copper Lock Nuts - Grades

  • UNS C17200 Lock Nuts
  • UNS C17300 Lock Nuts
  • UNS C17500 Lock Nuts
  • UNS C17510 Lock Nuts

Phosphor Bronze Lock Nuts - Grades

  • UNS C51000 Lock Nuts
  • UNS C51900 Lock Nuts
  • UNS C52100 Lock Nuts
  • UNS C54400 Lock Nuts

Silicon Bronze Lock Nuts - Grades

  • UNS C65100 Lock Nuts
  • UNS C65500 Lock Nuts
  • UNS C66100 Lock Nuts

Characteristics of Lock Nuts

  • Prevent Loosening: Lock nuts are designed with special features to prevent self-loosening, ensuring the fastened components remain securely in place even under heavy vibrations and dynamic loads.
  • Unique Design: These nuts often feature unique designs such as nylon inserts, distorted threads, or prevailing torque, creating resistance that prevents unintended rotation and maintains the tightness of the joint.
  • Wide Variety: Lock nuts come in various types, including nylon insert lock nuts, prevailing torque lock nuts, and all-metal lock nuts, offering solutions for different applications and requirements.
  • Compatibility: They are compatible with different fasteners and bolts, allowing for versatile use in machinery, automotive, construction, and other industries.
  • High Temperature and Corrosion Resistance: Lock nuts are often made from materials such as stainless steel or coated with anti-corrosive substances, enabling them to withstand high temperatures and resist corrosion, ensuring long-term performance.

Applications of Lock Nuts

Application Description
Automotive Industry Lock Nuts are used in the automotive industry to secure critical components such as wheels, suspension systems, and engine parts, ensuring safety and reliability in vehicles.
Aerospace Industry In the aerospace industry, Lock Nuts provide secure fastening for structural components, avionics, and engine assemblies, meeting stringent safety and performance standards.
Construction and Infrastructure Lock Nuts are vital in construction for securing structural elements, machinery, and equipment, offering durability and resistance to dynamic loads and environmental factors.
Machinery and Equipment Lock Nuts are used in various types of machinery and industrial equipment to prevent loosening of parts subjected to vibration and heavy use, enhancing operational stability.
Renewable Energy In renewable energy installations, such as wind turbines and solar panels, Lock Nuts ensure the secure fastening of components that are exposed to constant motion and stress.
Railway and Transportation The railway and transportation sectors rely on Lock Nuts to maintain the integrity of fastenings in rolling stock and infrastructure, ensuring safe and efficient operations.
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Send us your Requirement for Lock Nuts

We can assure you one of best prices in the Industry. We respond to all enquiries with in 4-8 hours on all business days. Send us your requirement on info@gicfasteners.com
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Lock Nuts - FAQs

Lock nuts, also known as prevailing torque nuts, have unique features like nylon inserts or distorted threads that prevent self-loosening, ensuring a tighter and more secure fastening compared to regular nuts.

Lock nuts find widespread use in automotive, machinery, construction, aerospace, electronics, and marine industries due to their ability to maintain tight connections under varying conditions.

Yes, lock nuts come in various types such as nylon insert lock nuts, all-metal lock nuts, and prevailing torque lock nuts, each designed for specific applications and environments.

Lock nuts can often be reused, but it's essential to inspect them for signs of wear or deformation before reuse to ensure optimal performance and safety.

Stainless steel lock nuts offer excellent corrosion resistance, making them ideal for applications in corrosive environments, including marine and chemical industries.

Choosing the right lock nut involves considering factors such as the application environment, required torque, and compatibility with the fastener. Consulting with our experts can help you select the most suitable option for your needs.

Yes, certain types of lock nuts, especially those made from heat-resistant materials, can withstand high temperatures and are suitable for use in applications exposed to extreme heat.

While specialized tools are not always necessary, using a torque wrench to achieve the recommended torque values during installation ensures the lock nut functions as intended, providing optimal security.

Yes, reputable manufacturers like GIC Fasteners produce lock nuts in compliance with international standards such as DIN, ASTM, ISO, and BS, ensuring high-quality and reliable performance in various applications.

Lock Nuts - Export Destination

Lock Nuts Supplier in North America
Antigua and Barbuda, Bahamas, Barbados, Belize, Canada, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, United States.
Lock Nuts Supplier in South America
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Falkland Islands, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela.
Lock Nuts Supplier in Europe
Albania, Andorra, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic (Czechia), Denmark, Estonia, Finland, France, Germany, Greece, Holy See, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, Russia, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, United Kingdom.
Lock Nuts Supplier in Asia
Afghanistan, Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, Brunei, Cambodia, Cyprus, Georgia, India, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Laos, Lebanon, Malaysia, Maldives, Mongolia, Myanmar, Nepal, Oman, Pakistan, Palestine, Philippines, Qatar, Saudi Arabia, Singapore, South Korea, Sri Lanka, State of Palestine, Syria, Taiwan, Tajikistan, Thailand, Timor-Leste, Turkey, Turkmenistan, United Arab Emirates, Uzbekistan, Vietnam, Yemen.
Lock Nuts Supplier in Australia
Australia, Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, New Zealand, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu.
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