Eye Nuts Manufacturer
MT.BOLTS manufactures Eye Nuts, which are specialized fasteners featuring a looped head designed for lifting, rigging, or securing cables, chains, and ropes. Eye nuts are typically threaded to screw onto a bolt or stud, creating a secure anchor point for hoisting or load-bearing applications. These nuts are essential in industries such as construction, marine, lifting and rigging, transportation, and utility services. MT.BOLTS supplies a wide range of eye nuts in various materials, load ratings, thread sizes, and finishes to meet international standards and demanding worksite requirements.
- System of Measurement:
- Metric: M6 – M64
- Imperial: 1/4″ to 2.5″
- Thread Pitch:
- Metric: Coarse (default)
- Imperial: UNC (Unified National Coarse), UNF (optional)
- Thread Type:
- Right-hand thread (standard)
- Left-hand thread (available on request)
- Height & Dimensions (General):
- Height and outer diameter vary depending on load rating and ring style
- Available in DIN / ISO / ASME lifting classes
- Eye Nut Types:
- DIN 582 Eye Nut – Common metric lifting eye nut
- ASME B18.15 / ASTM A489 Type A – Inch-series lifting eye nuts
- Welded Eye Nuts – For extra strength and safety
- Drop Forged or Machined Eye Nuts – For heavy-duty use
- Custom Shape Eye Nuts – Per drawing or application
Eye Nuts Material Types
MT.BOLTS supplies carbon steel, stainless steel, duplex steel, and nickel-based alloy Eye 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 |
Eye Nuts System of Measurement
Eye nuts are manufactured in both metric and imperial systems to accommodate global lifting and rigging requirements:
Metric Sizes: M6 to M64
Imperial Sizes: 1/4″ to 2-1/2″
Thread Pitch:
Metric: Coarse (standard), Fine available upon request
Imperial: UNC, UNF
Thread Type:
Right-hand thread (standard)
Left-hand thread (optional)
Lifting Capacity: Based on nominal thread size, body shape, and material—rated in kilograms or tons with a safety factor (typically 5:1)
Eye Nuts Common Standards
Eye nuts are produced in compliance with major international mechanical and lifting standards:
DIN 582 – Metric forged eye nuts
ASME B18.15 – Inch-series lifting eye nuts
ASTM A489 – Forged steel lifting eye nuts for general lifting applications
ISO 3266 – Lifting eye nuts with specified working load limits
BS 4278 – British standard lifting eye nuts
Custom / OEM Project Standards – For marine, defense, or offshore industries
Eye Nuts Surface Finishes
To meet diverse environmental conditions, eye nuts are available with multiple finishes:
Plain (Self-colored) – Untreated surface for dry, indoor applications
Zinc-Plated – Corrosion protection for moderate environments
Hot-Dip Galvanized – Excellent for outdoor or corrosive industrial settings
Black Oxide – Aesthetic and light protection
Electropolished / Passivated Stainless Steel – For marine, food-grade, or chemical exposure
Powder-Coated / PTFE-Coated – On request for color-coded or low-friction applications
Why Choose MT.BOLTS
- Material Diversity
- Standardized Production
- Ample Inventory
- Competitive Pricing
- Low-MOQ Customization
Benefits and Limitations of Eye Nuts
Benefits:
Lifting Capability – Designed for hoisting and rigging applications
Thread Protection – Threaded base ensures secure attachment to studs or threaded rods
Rotational Eye – Enables multi-directional pulling and lifting
Durability – Often drop-forged or machined from high-strength steel
Safety Marking – Load-rated versions typically stamped with WLL (Working Load Limit)
Limitations:
Installation Sensitivity – Must be properly torqued and aligned for vertical lifts
Size Limitations – Limited by thread compatibility and structural geometry
Not for Angular Loads (unless rated) – Standard eye nuts should not be side-loaded without angular load rating
Higher Cost – Compared to non-load-bearing nuts due to forging and testing requirements
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Eye Nuts Applications
Eye nuts are essential in industries where safe lifting, secure anchoring, or rigging is required:
Construction and Steel Erection – Lifting beams, panels, machinery
Marine and Offshore – Anchoring or lifting on ships, docks, rigs
Material Handling – Used with lifting slings, chains, and hoists
Industrial Equipment – Securing heavy components during transport or maintenance
Utilities and Infrastructure – Overhead line support, pole mounting
Defense and Aerospace – For secure tie-downs and lifting of precision equipment
FAQ About Eye Nuts
DIN 582 follows metric sizing and load ratings, while ASME B18.15 specifies inch-threaded designs and lifting tolerances used in North America.
Only if they are specifically rated for angular loads. Otherwise, side loading can significantly reduce strength and lead to failure.
Yes, 304 and 316 stainless steel eye nuts are highly resistant to saltwater corrosion.
Refer to manufacturer specifications or standard load charts. The capacity depends on size, material, and lifting direction.
Yes. MT.BOLTS offers OEM customization including laser-marked WLL, colored coatings, and non-standard thread types.
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