Manufacturer, Exporter & Supplier of Hex Nut

Hex Nuts (DIN/ISO Standard) – Stainless Steel & High-Strength Industrial Fasteners

Hex nuts are six-sided internally threaded fasteners designed to securely lock bolts and threaded rods in mechanical assemblies across structural, automotive, and heavy engineering systems. Manufactured according to standards such as DIN 934, ISO 4032, ASTM A194, and BS 3692, they ensure consistent torque performance and dimensional compatibility in high-load environments.

These fasteners are widely used in construction frameworks, oil & gas equipment, railway infrastructure, and industrial machinery where joint integrity under vibration and stress is critical. Depending on application demands, they are available in stainless steel, carbon steel, alloy steel, and high-tensile grades to balance corrosion resistance and mechanical strength.

KK Fasteners supplies hex nuts to OEMs and distributors across global industrial markets, offering full traceability, precise machining control, and export-compliant packaging for bulk industrial procurement requirements.

Hex Nuts Technical Specifications

Parameter	Specification
Material Grades	SS 304, SS 316, SS 316L, Carbon Steel (8.8, 10.9), Alloy Steel, Brass
Standards	DIN 934, ISO 4032, ASTM A194, BS 3692, JIS B1181
Size Range	M3 to M100 (Metric), 1/4” to 4” (Imperial)
Thread Types	Metric Coarse, Metric Fine, UNC, UNF
Surface Finish	Plain, Zinc Plated, Hot Dip Galvanized, Black Oxide, Nickel Plated
Hardness	Up to 10.9 Grade / 1040 MPa tensile strength (as per material grade)
Type Variants	Heavy Hex Nuts, Lock Nuts, Slotted Hex Nuts, Nylon Insert Nuts

Hex Nuts Dimension Chart

Hex Nut Dimensions (ANSI/ASME B18.2.2)
Nominal or Basic Major Diameter of Thread		Width Across Flats (F)			Width Across Corners (G)		Thickness of Hex Nuts (H)
Nominal or Basic Major Diameter of Thread		Basic	Max	Min	Max	Min	Basic	Max	Min
1/4	0.2500	7/16	.438	.428	.505	.488	7/32	0.226	0.212
5/16	0.3125	1/2	.500	.489	.577	.557	17/64	0.273	0.258
3/8	0.3750	9/16	.562	.551	.650	.628	21/64	0.337	0.320
7/16	0.4375	11/16	.688	.675	.794	.768	3/8	0.385	0.365
1/2	0.5000	3/4	.750	.736	.866	.840	7/16	0.448	0.427
9/16	0.5625	7/8	.875	.861	1.010	.982	31/64	0.496	0.473
5/8	0.6250	15/16	.938	.922	1.083	1.051	35/64	0.559	0.535
3/4	0.7500	1-1/8	1.125	1.088	1.299	1.240	41/64	0.665	0.617
7/8	0.8750	1-5/16	1.312	1.269	1.516	1.447	3/4	0.776	0.724
1	1.0000	1-1/2	1.500	1.450	1.732	1.653	55/64	0.887	0.831
1-1/8	1.1250	1-11/16	1.688	1.631	1.949	1.859	31/32	0.999	0.939
1-1/4	1.2500	1-7/8	1.875	1.812	2.165	2.066	1-1/16	1.094	1.030
1-3/8	1.3750	2-1/16	2.062	1.994	2.382	2.273	1-11/64	1.206	1.138
1-1/2	1.5000	2-1/4	2.250	2.175	2.598	2.480	1-9/32	1.317	1.245
1-5/8	1.6250	2-7/16	2.438	2.356	2.815	2.686	1-25/64	1.429	1.353
1-3/4	1.7500	2-5/8	2.625	2.538	3.031	2.893	1-1/2	1.540	1.460
2	2.000	3	3.000	2.900	3.464	3.306	1-23/32	1.763	1.675
2-1/4	2.2500	3-3/8	3.375	3.263	3.897	3.719	1-15/16	1.986	1.890
2-1/2	2.5000	3-3/4	3.750	3.625	4.330	4.133	2-5/32	2.209	2.105
2-3/4	2.7500	4-1/8	4.125	3.988	4.763	4.456	2-3/8	2.431	2.319
3	3.000	4-1/2	4.500	4.350	5.196	4.959	2-19/32	2.654	2.534

Stainless Steel Hex Nuts - Grades

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

Grades of Nickel Alloys Hex Nuts

Inconel 600 Hex Nuts
Inconel 601 Hex Nuts
Inconel 625 Hex Nuts
Inconel 718 Hex Nuts
Incoloy 800 Hex Nuts
Incoloy 825 Hex Nuts
Monel 400 Hex Nuts
Monel K500 Hex Nuts
Nickel 200 Hex Nuts
Nickel 201 Hex Nuts
Hastelloy C276 Hex Nuts
Hastelloy C22 Hex Nuts
Hastelloy B2 Hex Nuts
Hastelloy B3 Hex Nuts
Hastelloy X Hex Nuts

Duplex Steel Hex Nuts- Grades

UNS S32205 Hex Nuts
UNS S31803 Hex Nuts

Super Duplex Steel Hex Nuts - Grades

UNS S32750 Hex Nuts
UNS S32760 Hex Nuts

Inconel/Incoloy Hex Nuts - Grades

Inconel 600 Hex Nuts
Inconel 601 Hex Nuts
Inconel 625 Hex Nuts
Inconel 718 Hex Nuts
Incoloy 800 Hex Nuts
Incoloy 825 Hex Nuts

Monel Hex Nuts - Grades

Monel 400 Hex Nuts
Monel K500 Hex Nuts

Nickel Hex Nuts - Grades

Nickel 200 Hex Nuts
Nickel 201 Hex Nuts

Hastelloy Hex Nuts - Grades

Hastelloy C276 Hex Nuts
Hastelloy C22 Hex Nuts
Hastelloy B2 Hex Nuts
Hastelloy B3 Hex Nuts
Hastelloy X Hex Nuts

Titanium Hex Nuts - Grades

Titanium Grade 2 Hex Nuts
Titanium Grade 5 Hex Nuts

Tantalum Hex Nuts- Grades

UNS R05200 Hex Nuts
UNS R05252 Hex Nuts
UNS R05255 Hex Nuts
UNS R05400 Hex Nuts

Cupro Nickel Hex Nuts - Grades

CuNi 90/10 Hex Nuts
CuNi 70/30 Hex Nuts

Copper Hex Nuts - Grades

UNS C11000 Hex Nuts
UNS C10100 Hex Nuts
UNS C10200 Hex Nuts
UNS C12000 Hex Nuts
UNS C12200 Hex Nuts

Carbon Steel Hex Nuts - Grades

Carbon Steel AISI 1018 Hex Nuts
Carbon Steel AISI 1020 Hex Nuts
Carbon Steel AISI 1040 Hex Nuts
Carbon Steel AISI 1045 Hex Nuts

Alloy Steel Hex Nuts - Grades

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

Brass Hex Nuts - Grades

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

Aluminium Hex Nuts - Grades

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

Zirconium Hex Nuts - Grades

UNS R60700 Hex Nuts
UNS R60702 Hex Nuts
UNS R60704 Hex Nuts
UNS R60705 Hex Nuts
UNS R60706 Hex Nuts

Beryllium Copper Hex Nuts - Grades

UNS C17200 Hex Nuts
UNS C17300 Hex Nuts
UNS C17500 Hex Nuts
UNS C17510 Hex Nuts

Phosphor Bronze Hex Nuts - Grades

UNS C51000 Hex Nuts
UNS C51900 Hex Nuts
UNS C52100 Hex Nuts
UNS C54400 Hex Nuts

Silicon Bronze Hex Nuts - Grades

UNS C65100 Hex Nuts
UNS C65500 Hex Nuts
UNS C66100 Hex Nuts

Key Technical Features

High tensile load capacity: Designed to withstand axial clamping forces up to 1040 MPa in Grade 10.9 variants, making them suitable for structural steel and heavy machinery assemblies.
Precision thread geometry: Manufactured with controlled pitch accuracy ensuring smooth engagement with bolts and reduced risk of thread galling under dynamic loads.
Corrosion resistance options: Stainless steel variants (SS 316/316L) provide enhanced resistance against chloride-rich and marine environments.
Dimensional accuracy compliance: Produced within tight tolerances under DIN/ISO standards ensuring interchangeability across global fastening systems.
Vibration-resistant performance: Optimized geometry reduces loosening in high-vibration environments such as engines, turbines, and railway assemblies.
Surface treatment flexibility: Multiple coating options improve wear resistance and extend service life in outdoor or chemically exposed applications.
Load distribution efficiency: Flat bearing surfaces ensure uniform load distribution across joint interfaces, reducing stress concentration.

Industry Applications

Hex nuts are used to secure bolted joints in structural, mechanical, and precision engineering systems where reliability under load and vibration is critical. They act as the primary locking element in threaded assemblies across multiple industries.

Automotive Manufacturing: Used in engine assemblies, chassis structures, and suspension systems requiring high-torque fastening stability.
Oil & Gas Equipment: Applied in pipeline flanges, valve assemblies, and drilling rigs exposed to pressure and corrosive environments.
Construction & Infrastructure: Essential for steel beam connections, bridges, and prefabricated structural frameworks.
Railway Engineering: Used in track fastening systems, carriage assemblies, and braking mechanisms under continuous vibration.
Power Generation Plants: Installed in turbines, generators, and heavy rotating equipment requiring long-term mechanical stability.
Shipbuilding & Marine Systems: Stainless steel variants resist seawater corrosion in hull fittings and deck machinery.
Industrial Machinery: Secures rotating and static machine parts in manufacturing lines and heavy-duty equipment.

Manufacturing & Quality Assurance

Hex nuts are manufactured using cold forging and precision threading processes to ensure uniform grain structure and dimensional accuracy. Raw materials are first inspected for chemical composition compliance before forging. The threading process is followed by heat treatment (for high-tensile grades) to achieve required mechanical strength.

Each batch undergoes dimensional inspection, thread gauge verification, and hardness testing. Surface treatments are validated for coating thickness and adhesion quality. Traceability is maintained through lot marking systems aligned with ISO 9001 quality management standards.

At KK Fasteners, every production cycle is monitored through multi-stage inspection protocols, ensuring consistent performance across bulk export orders and industrial supply chains.

Wide Range of Quality Products

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Competitive Pricing and Cost Savings

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Exceptional Customer Service

Personalized assistance, prompt responses, and a commitment to meeting your needs, making your purchase process seamless.

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Hex Nuts - FAQs

What are hex nuts?

Hex nuts are six-sided internally threaded fasteners used with bolts or threaded rods to create secure mechanical joints. They are manufactured as per DIN, ISO, and ASTM standards and are widely used in structural, automotive, and industrial applications for reliable load-bearing connections.

Which material is best for hex nuts?

Stainless steel grades like SS 316 and SS 316L are best for corrosive or marine environments, while carbon steel grades such as 8.8 and 10.9 are preferred for high-strength structural applications. The selection depends on load requirements, corrosion exposure, and operating conditions.

What standards are used for hex nuts manufacturing?

Hex nuts are commonly produced according to DIN 934, ISO 4032, ASTM A194, and BS 3692 standards. These standards define dimensional accuracy, mechanical strength, and compatibility with global fastening systems used across industries.

How do I select the right hex nut for my application?

Selection depends on bolt size, load conditions, environment, and required strength grade. Engineers typically consider tensile strength, corrosion resistance, and thread compatibility before choosing the correct hex nut specification for safe and reliable performance.

How can I find a reliable hex nuts manufacturer and exporter?

Choose a manufacturer with ISO certification, material traceability, strict quality inspection systems, and proven export experience. A dependable supplier should also provide test certificates and consistent dimensional accuracy for bulk industrial orders.

Hex Nuts - Export Destination

Hex 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.

Hex Nuts Supplier in South America

Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Falkland Islands, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela.

Hex 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.

Hex 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.

Hex Nuts Supplier in Australia

Australia, Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, New Zealand, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu.

Hex nuts remain a foundational component in industrial fastening systems where reliability, strength, and dimensional precision are critical. With controlled manufacturing processes and multi-grade material availability, they support diverse engineering applications across global industries.

For technical specifications, bulk procurement, or custom requirements, KK Fasteners provides export-ready solutions backed by inspection-controlled production and international supply capability. Contact the engineering team to request a quotation or detailed specification sheet for your application.

Hex Nuts