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Eye Nuts
Codipro Eye Nuts
Where a bolt passes through the load rather than threading into it, the eye nut is the lifting attachment. Codipro swivel eye nuts give you the same 360° rotation and 180° pivot capability as the swivel eye bolt, but in an internally threaded configuration that runs down a bolt or stud. The swivel body keeps the eye aligned with the rigging regardless of the sling angle, which matters when you are setting precision machinery with fixed bolt patterns and no room to adjust the rigging geometry.
About Codipro Eye Nuts
An eye nut threads onto a bolt or stud that passes through the load, as opposed to an eye bolt, which threads into a tapped hole. The distinction matters for how the attachment point is installed. On prefabricated assemblies where through-bolts are part of the structure, eye nuts allow a lifting point without drilling and tapping the load itself.
Codipro swivel eye nuts are forged alloy steel, proof-tested at manufacture, and certified to EN 1677-1. DGUV certification provides independent technical verification recognized in European offshore, wind energy, and heavy industrial sectors. The swivel body rotates 360° and pivots to 180° under load, so the eye follows the sling rather than forcing the sling to align with a fixed point.
ASME B30.26 (Rigging Hardware) governs design, marking, and inspection for eye nuts and lifting points used in overhead lifting service in North America. Every Codipro eye nut ships with a proof test certificate and is marked with WLL and manufacturer identification.
Holloway Houston is the authorized North American distributor for Codipro. We stock swivel eye nuts in Houston.
Types of Codipro Eye Nuts
Swivel Eye Nuts with Metric Thread
Metric thread configurations thread onto metric bolts or studs, the dominant fastener standard in European machinery, wind energy, and offshore applications. The Codipro swivel body is forged alloy, quenched and tempered, with 360° rotation and 180° pivot under load. This allows the sling to pull from any angle within the pivot range at full rated WLL.
Swivel Eye Nuts with UNC Thread
UNC (Unified National Coarse) thread configurations mate to imperial bolts, the standard in North American equipment, maintenance environments, and fabrication shops where bolt patterns follow inch dimensions. Function is identical to the metric version: swivel eye, proof-tested body, EN 1677-1 rating.
Codipro Eye Nut Sizes and Working Load Limits
Codipro swivel eye nuts are available across a WLL range and thread size range suited for precision and heavy industrial lifting.
- Material: Forged alloy steel, quenched and tempered
- Standard: EN 1677-1
- Certification: DGUV
- Thread configurations: Metric and UNC
- Marking: WLL and manufacturer ID per EN 1677-1 and ASME B30.26
- Documentation: Proof test certificate with every order
Why Codipro for Eye Nuts
Codipro's swivel lifting hardware is designed for applications where a fixed eye is not enough, where the load geometry, rigging angle, or lifting sequence makes a rotating attachment point the practical choice rather than an engineering workaround.
For eye nuts specifically, the swivel design means the attachment point adapts to the rigging rather than requiring the rigging to align with a fixed through-bolt axis. On machinery with embedded bolt patterns and no adjustment room, that capability is what allows a clean lift without improvised rigging.
The EN 1677-1 and DGUV credentials are recognized in European sectors that Holloway Houston's North American customers frequently work alongside, wind energy, offshore, and precision industrial. Codipro documentation is consistent with the traceability requirements those sectors typically carry.
Holloway Houston also offers rigging inspection services. Our qualified inspectors examine eye nuts, lifting points, and rigging hardware per ASME B30.26 and OSHA standards.
Shop by Product Type
Codipro Eye Nut Applications by Industry
- Heavy Machinery Installation: Setting gearboxes, turbines, and motors where through-bolts are part of the structural assembly and the lifting attachment threads onto them.
- Wind Energy: Tower and nacelle component rigging where metric bolt patterns are fixed by design and the lifting angle is set by the crane position.
- Offshore and Marine: Topside and deck equipment lifts where through-bolted assemblies require a lifting point that does not require additional machining.
- Precision Fabrication: Shop and field lifts where the attachment configuration is dictated by the existing fastener layout.
- Aerospace and Defense: Component handling where traceability, proof test documentation, and DGUV certification meet project-specific requirements.
Why Holloway Houston for Codipro Eye Nuts
Holloway Houston is the authorized North American distributor for Codipro and has been in the rigging and lifting business for over 65 years, operating from Houston, Texas. We stock Codipro swivel eye nuts alongside eye bolts, hoist rings, and lifting points.
In-stock eye nuts ship same day. Proof test certificates come with every order. Our rigging specialists can help match thread specification, bolt diameter, and WLL to your application.
Complete Your Codipro Lifting Assembly
Eye Nut Safety and Awareness
Eye nuts in load-handling service fall under ASME B30.26 (Rigging Hardware), which covers design factors, marking requirements, and inspection for rigging hardware in overhead lifting service. OSHA 1910.184 and OSHA 1926.251 reference rigging hardware inspection in general industry and jobsite use.
- Bolt engagement through the eye nut follows the manufacturer's specification for full rated capacity. Threading an eye nut to partial engagement reduces the effective load path.
- Pre-use inspection covers the eye and swivel body for cracks, deformation, and marking legibility. An eye nut with a deformed or cracked swivel body should be removed from service.
- The swivel mechanism allows the eye to align with the sling angle within the manufacturer's rated pivot range. Loading outside that range, or side-loading beyond what the manufacturer specifies — warrants removal and inspection.
- Per ASME B30.26, rigging hardware with illegible WLL or manufacturer markings is not suitable for lifting service.
- Proof test certificates from Codipro are tied to individual pieces or production lots. Retaining documentation for the hardware's service life is standard industry practice.
Frequently Asked Questions
A swivel eye bolt threads into a tapped hole in the load, the bolt is the attachment. A swivel eye nut threads onto a bolt or stud that passes through the load, the nut is the attachment. Both share the same Codipro swivel body: 360° rotation and 180° pivot under load at full rated WLL.
Codipro swivel eye nuts are manufactured to EN 1677-1, the European standard for forged components in load-handling service, and are DGUV certified. In North America, ASME B30.26 (Rigging Hardware) governs design, marking, and inspection for eye nuts and lifting points used in overhead lifting service.
Codipro swivel eye nuts are available in both metric and UNC thread configurations. Metric covers European machinery, wind energy, and offshore bolt patterns. UNC configurations work with North American imperial fastener standards. Contact Holloway Houston at 1-888-496-4700 to confirm thread size and WLL availability.
Every Codipro eye nut order from Holloway Houston ships with a proof test certificate from the manufacturer. Hardware is marked with WLL and manufacturer identification per EN 1677-1 and ASME B30.26. Documentation packages for project traceability requirements are available on request.
ASME B30.26 specifies frequent inspection of rigging hardware before or during each use, and periodic inspection at intervals based on service severity. Pre-use inspection covers the swivel body for deformation or cracking, the eye for wear, and marking legibility. An eye nut removed from service after shock loading should be inspected by a qualified person before being returned.
Codipro swivel eye nuts see regular use in heavy machinery installation, wind energy, offshore and marine, precision fabrication, and aerospace applications. The through-bolt configuration is the choice when the load has a fixed bolt pattern and the lifting attachment needs to thread onto, rather than into, the assembly.
DISCLAIMER
Eye nuts are load-bearing rigging components. Selection, inspection, and use call for training consistent with ASME B30.26 (Rigging Hardware) and applicable OSHA standards. The information on this page is provided for general product awareness and does not replace qualified engineering judgment, manufacturer documentation, or site-specific lift procedures.
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