Hex Nuts Manufacturer
MT.BOLTS manufactures Hex Nuts, which are essential fastening components designed to be used with bolts, screws, and studs to secure parts together in mechanical assemblies. With a six-sided (hexagonal) shape, these nuts provide excellent wrench grip and are widely used across industries including construction, automotive, energy, and machinery. MT.BOLTS offers hex nuts in various grades, sizes, materials, and finishes to meet international standards and demanding engineering requirements.
- System of Measurement:
- Metric (M6–M64) | Imperial (1/4″ to 2.5″)
- Height Range (Thickness):
- Metric: 4 mm to 60 mm
- Imperial: 5/32″ to 2-3/8″
- Thread Pitch:
- Metric: Coarse (default), Fine
- Imperial: UNC, UNF
- Thread Type:
- Right-hand thread (standard)
- Left-hand thread (optional)
Hex Nuts Material Types
MT.BOLTS supplies carbon steel, stainless steel, duplex steel, and nickel-based alloy hex nuts , meeting the demanding requirements of chemical, marine, and high-temperature environments, compliant with various international standards.
| Material Category | Common Grades/Models | Description |
| Carbon Steel | ASTM A307, A325, A490 | High strength and cost-effective, suitable for general structures; requires anti-corrosion coating. |
| Stainless Steel | 304 (A2), 316 (A4), 321, 410 | Excellent corrosion resistance; widely used in food, chemical, and construction industries |
| Duplex Stainless Steel | UNS S31803/S32205 (F51), UNS S32750 (F53) | High strength with superior chloride corrosion resistance; used in seawater, petrochemical, and paper industries |
| Monel Alloys | Monel 400, Monel K500 | Excellent seawater corrosion resistance and mechanical strength; used in marine engineering and pump systems |
| Hastelloy Alloys | Hastelloy C276, C22, B2, X | Excellent resistance to strong acids and oxidizing media; widely used in chemical equipment and flue gas desulfurization |
| Inconel Alloys | Inconel 600, 625, 718 | Resistant to high temperature, pressure, and corrosion; used in heat exchangers, aerospace, and nuclear industries |
| Incoloy Alloys | Incoloy 800, 825, 925 | Ideal for high-temperature acidic environments; widely used in petroleum refining and heat treating systems |
| Nickel Alloys | Nickel 200, 201 | Pure or high-nickel alloys with excellent conductivity and alkali resistance; used in electronics and chemical applications |
Hex Nuts System of Measurement
Hex nuts are manufactured in both Metric and Imperial (Inch) systems to match bolt threads and global application standards:
Metric Sizes: M3 to M64
Imperial Sizes: 1/4″ to 2.5″ (UNC/UNF)
Thread Pitch:
Metric: Coarse (default), Fine
Inch: UNC (Unified Coarse), UNF (Unified Fine)
Thread Direction:
Standard: Right-hand
Optional: Left-hand (for special applications)
- Metric nuts typically follow ISO, DIN, or JIS standards, while imperial sizes conform to ASME/SAE standards.
Hex Nuts Common Standards
Hex nuts are produced under widely recognized international standards to ensure consistency in dimensions, material properties, and performance:
- ASTM A563 – Standard for carbon and alloy steel nuts
- ASTM A194 – Nuts for high-temperature or pressure service
- DIN 934 / DIN 439 / DIN 985 / DIN 6923 – Metric standard hex nuts, thin nuts, and nylon lock nuts
- ISO 4032 / 4033 / 4035 – Standard hex nuts (ISO metric thread)
- ASME B18.2.2 – Hex nuts for inch-series bolts and studs
- SAE J995 – Mechanical and material requirements for inch-series nuts
- JIS B 1181 – Japanese standards for hex nuts
- OEM / Project-Specific Specifications – Available for special industries or clients
Hex Nuts Surface Finishes
- Zinc-plated – Corrosion resistance in indoor environments
- Hot-dip galvanized – Excellent protection in outdoor/marine use
- Black oxide – Mild corrosion resistance, often for aesthetic or indoor use
- Passivated – Used on stainless steel bolts to improve corrosion resistance
- Custom Coatings (e.g., PTFE) – Non-stick, chemical-resistant for harsh environments
Why Choose MT.BOLTS
- Material Diversity
- Standardized Production
- Ample Inventory
- Competitive Pricing
- Low-MOQ Customization
Benefits and Limitations of Hex Nuts
Advantages
- Simple and Effective: Standard fastening method for bolts and studs
- Versatile: Available in a wide range of sizes, grades, and coatings
- High Torque Resistance: Hexagonal shape allows for strong wrench grip
- Reusable: Can typically be reused multiple times under proper torque control
- Compatibility: Works with a variety of bolt types and washers
Disadvantages
- May Require Locking Mechanism: Can loosen under vibration without washers or lock nuts
- Dependent on Thread Engagement: Insufficient thread depth reduces performance
- Not Self-Locking: Needs additional components in critical applications
- Corrosion Sensitivity: Requires coating or material upgrade in harsh environments
Send Us A Message
Hex Nuts Applications
Hex nuts are used across nearly all industries where mechanical fastening is required:
- Construction and Steel Structures
- Machinery and Equipment Assembly
- Automotive and Heavy Vehicles
- Oil & Gas and Petrochemical Industry
- Aerospace and Shipbuilding
- Rail and Infrastructure Projects
- Electrical Cabinets and Metal Fabrication
- General Fastening and Repair Work
They are often paired with hex bolts, studs, threaded rods, washers, and spring lock washers.
FAQ About Hex Nuts
A heavy hex nut is larger and thicker than a standard hex nut, offering more bearing surface and higher strength.
Yes, nuts made to ASTM A194 or with stainless/alloy materials can withstand high temperatures.
Yes, but it depends on application, torque applied, and thread wear—reuse is not recommended in critical or safety-related joints.
Hot-dip galvanizing, zinc-nickel plating, PTFE coating, or using stainless steel hex nuts are common options.
No, thread type and pitch must match; also, strength grade compatibility (e.g., Class 10 nut with Grade 10.9 bolt) is important.
Related Products
17-4 PH Stainless Steel Fasteners
17-4 PH Stainless Steel Fasteners Supplier MT.BOLTS manufactures 17-4 PH stainless steel fasteners using high-quality precipitation-hardening stainless steel. These fasteners
18-8 stainless steel fasteners
18-8 Stainless Steel Fasteners Supplier MT.BOLTS manufactures 18-8 stainless steel fasteners using high-quality austenitic stainless steel grades such as 304,
ASTM A307 Bolts
ASTM A307 Bolts Supplier MT.BOLTS manufactures ASTM A307 carbon steel bolts using high-quality low-carbon steel materials. These bolts offer reliable