Bolts
I-Bolt (Eye Bolt)
Accurate Fastners manufactures stainless steel eye bolts — listed in its product range as I-Bolts — with a forged ring head and metric thread, available in grades SS 202, SS 304 and SS 316 across diameters from M6 to M16. These fasteners are intended for lifting, rigging and load-suspension duties where a secure attachment point is required.
- Standard
- —
- Grades
- 304 / 316 / 202
- Size
- M6 – M16
- Length
- On enquiry
Verification note: Listed in the brochure as "I-Bolts"; the supplied image shows eye bolts. Confirm naming with Accurate Fastners.
Overview
What is the I-Bolt (Eye Bolt)?
An eye bolt is a threaded fastener with a closed circular loop — the 'eye' — formed at one end in place of a conventional head. The loop is designed to accept hooks, shackles, ropes, cables or chains, making the fastener a load-attachment point that can be threaded into a tapped hole or passed through a clearance hole and secured with a nut. Eye bolts are widely used wherever equipment, panels or structures need a reliable suspension or tie-down point.
The eye bolts supplied by Accurate Fastners feature a forged ring head, which is significant from a safety and structural standpoint. Forging consolidates the grain structure of the stainless steel through compressive force, producing a head that is generally denser and more resistant to deformation under load than a fabricated or welded ring. The shank carries a standard metric thread, allowing the fastener to mate with metric nuts or threaded inserts across the M6 to M16 diameter range.
A defining characteristic of this product is the combination of a corrosion-resistant stainless steel body with a fully enclosed eye geometry. Unlike open hooks or swivel fittings, a closed-ring eye bolt retains an attached line even under slack conditions, reducing the risk of accidental disengagement during handling. The metric thread form also ensures dimensional compatibility with the broad ecosystem of metric hardware used across Indian and export markets.
In Depth
Product description
Construction and Geometry
The fastener body consists of two distinct zones: a circular eye and a threaded shank. The eye is forged as a continuous ring — there is no weld seam or open gap — and transitions into the shank through a formed shoulder or collar. This collar distributes load from the eye into the shank more evenly than an abrupt junction would. The shank itself is machined to metric thread form, conforming to the metric coarse-pitch series across the M6 to M16 diameter range.
The overall proportions of the ring — its inner diameter, wire section and the relationship of the ring plane to the shank axis — determine how the fastener responds to different load directions. Straight pull along the shank axis is the typical design orientation. The stainless steel material resists oxidation at the surface, which helps preserve thread integrity and the smooth bore of the eye for hook or shackle engagement over the service life of the assembly.
Functional Behaviour in an Assembly
When an eye bolt is installed into a tapped hole, torque applied to the collar or shank draws the bearing face tight against the parent material, creating a fixed attachment point. The eye then serves as the interface between the structural member and the lifting or restraining element — typically a shackle, carabiner or rigging hook. Load transfers from the line through the eye ring, into the forged collar, and then into the threaded joint with the mating component.
It is generally advisable to load eye bolts along the axis of the shank rather than at an angle to it, as angular loading introduces bending moments that reduce the effective load-carrying capacity of the assembly. Where angled loads are unavoidable, engineers typically specify shoulder-pattern eye bolts or add a suitable rigging arrangement. Confirming the intended load direction and magnitude with qualified personnel before installation is considered standard practice.
How Eye Bolts Differ from Similar Fasteners
Eye bolts are frequently compared with eye nuts, rod ends and lifting lugs. An eye nut is internally threaded and receives a stud or rod, whereas an eye bolt is externally threaded and drives into a tapped hole — the load-attachment function is similar but the installation geometry is opposite. Rod ends incorporate a bearing race inside the eye, permitting rotation, which is not a feature of a plain forged eye bolt.
Lifting lugs are typically welded plate features on fabricated structures, not removable fasteners. Eye bolts, by contrast, are discrete, removable components that can be installed or replaced independently. Compared with hook bolts, which have an open J-profile, a closed-ring eye bolt retains the attached hardware even when not under tension, making it the preferred choice in applications where inadvertent disengagement of a hook could be problematic.
Material & Grade
Material and grade information
- SS 304
- SS 316
- SS 202
Accurate Fastners supplies eye bolts in three stainless steel grades: SS 202, SS 304 and SS 316. SS 202 is an austenitic grade with manganese partially substituting nickel; it offers good formability and adequate corrosion resistance in mild indoor environments and is often selected where cost is a primary consideration. SS 304 is the widely used general-purpose austenitic grade, offering a balanced combination of corrosion resistance, weldability and mechanical properties suitable for a broad range of indoor and sheltered outdoor service conditions.
SS 316 incorporates molybdenum, which generally improves resistance to chloride-containing environments and certain industrial chemicals compared with SS 304. It is commonly specified in food-processing, pharmaceutical and coastal or marine-adjacent settings. The most appropriate grade for a given installation depends on the service environment, exposure to moisture or chemicals, and any applicable industry or project specifications. Customers are encouraged to discuss their specific conditions with the Accurate Fastners sales team before confirming a grade.
Grades shown are those documented for this product in the Accurate Fastners brochure. General material notes are guidance only; confirm grade selection for your environment.
Technical Data
Technical specifications
| Product type | Bolt – I-Bolt (Eye Bolt) |
|---|---|
| Material | Stainless steel |
| Material grade | SS 304, SS 316, SS 202 |
| Nominal diameter / size | M6 – M16 |
| Length | To be confirmed on enquiry |
| Thread type | Metric |
| Head / form | Forged ring (eye) head |
Sizes
Available sizes
Documented size range
M6 – M16
Documented length range
On enquiry
Individual sizes within the documented range, thread pitches and lengths are confirmed at quotation stage.
Applications
Industrial applications
Solar Energy Installations
Eye bolts may be used as attachment points for cable management, panel-lifting operations or ground-anchor rigging during the installation and maintenance of solar energy structures where stainless steel corrosion resistance is beneficial.
Pharmaceutical Machinery
SS 316 eye bolts are commonly specified on pharmaceutical processing equipment to provide hygienic, corrosion-resistant lift points for machinery panels, vessel lids and other components that require periodic removal and repositioning.
Food and Beverage Equipment
In food and beverage environments, stainless steel eye bolts can serve as suspension or tie-down points on processing lines, conveyors or tank assemblies where resistance to cleaning agents and moisture is a routine requirement.
Submersible Pump Assemblies
Eye bolts are sometimes fitted to submersible pump housings or motor frames to facilitate safe lowering and retrieval from wells or sumps, where a secure, corrosion-resistant lifting point is a practical necessity.
General Industrial Rigging and Handling
Across manufacturing and fabrication facilities, eye bolts in M6–M16 metric sizes provide versatile, removable attachment points for temporary lifting slings, restraining cables and alignment rigs during equipment assembly.
Features & Selection
Features and selection considerations
Design features
Forged Ring Head
The eye is produced by forging rather than welding or bending, resulting in a continuous ring with consolidated grain structure that generally exhibits greater resistance to deformation under load.
Metric Thread Shank
The M6–M16 metric thread series ensures dimensional compatibility with standard metric nuts, tapped holes and inserts widely used across Indian manufacturing and international export projects.
Three Stainless Steel Grades
Availability in SS 202, SS 304 and SS 316 allows selection of the appropriate corrosion-resistance and cost profile to match the service environment and project budget.
Closed-Ring Geometry
The fully enclosed eye retains hooks, shackles or cables even when the assembly is slack or momentarily unloaded, reducing the risk of inadvertent disengagement during handling operations.
Quality-Checked at Procurement and Delivery
Accurate Fastners' quality control team performs checks at both procurement and dispatch stages, supporting consistent dimensional and material conformance of the supplied product.
Before you order
Diameter and Thread Compatibility
Confirm the required metric diameter — M6 through M16 — against the tapped hole or nut specification in your assembly. Mismatched thread diameters or pitches will prevent correct installation and may compromise the joint.
Grade Selection for Service Environment
Choose SS 202 for mild indoor use, SS 304 for general-purpose applications, or SS 316 where chloride exposure, cleaning chemicals or pharmaceutical/food hygiene requirements make the molybdenum-bearing grade more appropriate.
Load Direction and Eye Proportions
Confirm the anticipated load direction — axial or angular — and discuss eye inner-diameter requirements with the sales team to ensure the ring accommodates the intended shackle pin or hook size without binding.
Quantity and Documentation
State required quantities, grade, diameter and any applicable standard references when enquiring. Accurate Fastners can advise on minimum order quantities and provide documentation to support procurement and quality records.
FAQs
Frequently asked questions
What diameter range do your stainless steel eye bolts cover?
Accurate Fastners' eye bolts are available from M6 to M16 in metric thread. If you require sizes outside this range, please contact the sales team to discuss whether alternative arrangements can be accommodated.
Which stainless steel grades are these eye bolts available in?
They are available in SS 202, SS 304 and SS 316. SS 316 is generally preferred in environments with chloride exposure or stringent hygiene requirements, while SS 304 suits most general-purpose indoor and sheltered applications.
Are these eye bolts compliant with any recognised standards?
Accurate Fastners' fastener range is produced in line with IS, BS and DIN standards where applicable. Please state your specific standard requirement when enquiring so the sales team can confirm compliance for the eye bolt you need.
Can eye bolts be used for angled or side loading?
Plain forged eye bolts are generally designed for axial loading along the shank. Angular loads introduce bending stresses that may reduce assembly capacity. We recommend consulting a qualified engineer and discussing your load conditions with our sales team before specifying.
What other fasteners from Accurate Fastners are commonly used alongside eye bolts?
Metric nuts, washers and threaded rod from Accurate Fastners' range are often used in conjunction with eye bolts to complete suspension or anchoring assemblies. The sales team can advise on compatible components from the broader product catalogue.
How can I request a quotation for eye bolts?
You can submit an enquiry through the website enquiry form, email the team at export@accuratefastners.com, or reach out via WhatsApp. Please include the grade, diameter, quantity and any standard references to receive an accurate quotation promptly.
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