Eye Bolts
Secure Lift, Reliable Eye Bolt Strength.
Forged Tough, Zero Lifting Safety Risk.
Factory Built, Fit All Rigging Scenes.
>90% of users report fewer and stripped heads, keeping the job moving
Optimized for #2 Phillips bits to reduce cam-out and driver wear by 30%.
48-hour salt spray rating—guarantees a rust-free finish for 10 years.
Sinsun Eye Bolts Factory | Premium Stainless Steel & Heavy Duty Eye Bolts
Sinsun is a professional eye bolts factory and trusted global supplier. We manufacture stainless steel eye bolts, galvanized eye bolts, heavy duty eye bolts and long eye bolts for lifting, rigging and industrial anchoring. Get certified high-load eye bolt solutions with factory direct prices.
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Eye bolts (also called lifting eye bolts and eye screw bolts) are forged fasteners with a closed circular eye loop and threaded shank. Depending on what part of the world you live in, these products may be known by different names. In Europe, they are called boulons à oeil, in Spanish speaking regions pernos de ojo, and in industrial circles, they are known as rigging eye bolts. These multi-purpose hardware components offer vital connection points for ropes, cables and chains to lift, anchor and secure all kinds of equipment and structural elements.
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Sinsun is a professional eye bolts manufacturer. We provide consistent high quality, which is the difference between our eye bolts and the common industrial fasteners. Most standard factories are based on standard mould production with fixed material configurations. We customise forging density, thread precision and surface treatment based on the actual load demands and working environments. All our eye bolts conform to DIN and ISO industrial standards to ensure uniform mechanical performance and structural stability.
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Many global purchasers suffer from common industry defects on low-grade eye bolts, such as eye loop deformation, incorrect thread match and poor anti-corrosion performance. We solve these pain points via integral hot forging and strict layer-by-layer quality inspection. Our stainless steel eye bolts and galvanised eye bolts maintain stable bearing capacity during prolonged vibration and exposure to the outdoor elements. We also customise long eye bolts, as well as heavy duty eye bolts, for personalised industrial and construction scenarios.
| Thread (d) | Pitch (mm) | Eye Outside Diameter (d₃) | Eye Inside Diameter (d₄) | Overall Height (h) | Min Thread Length (l) | Approx. WLL Vertical (kg) | Grade Available | Surface Finish |
| M6 | 1 | 28 mm | 14 mm | 10 mm | 12 mm | 125 kg | 8.8 / A2 | Zinc / Black Oxide |
| M8 | 1.25 | 32 mm | 17 mm | 12 mm | 16 mm | 225 kg | 8.8 / 10.9 / A4 | Zinc / HDG |
| M10 | 1.5 | 36 mm | 20 mm | 15 mm | 20 mm | 400 kg | Grade 8 / A2 / A4 | Zinc / HDG / Black Oxide |
| M12 | 1.75 | 45 mm | 26 mm | 18 mm | 22 mm | 600 kg | Grade 8 / 10.9 / A4 | Zinc / HDG / Black Oxide |
| M16 | 2 | 56 mm | 34 mm | 23 mm | 28 mm | 1,000 kg | Grade 8 / 10.9 / A4 | Zinc / HDG / Black Oxide |
| M20 | 2.5 | 70 mm | 44 mm | 28 mm | 32 mm | 1,600 kg | Grade 8 / 10.9 / A4 | HDG / Black Oxide |
| M24 | 3 | 85 mm | 56 mm | 34 mm | 38 mm | 2,200 kg | Grade 8 / 10.9 / A4 | HDG / Black Oxide |
| M30 | 3.5 | 100 mm | 66 mm | 41 mm | 45 mm | 3,400 kg | Grade 8 / 10.9 | HDG / Black Oxide |
| M36 | 4 | 120 mm | 81 mm | 49 mm | 52 mm | 4,800 kg | Grade 8 | HDG |
| M48 | 5 | 150 mm | 102 mm | 63 mm | 68 mm | 6,500 kg | Grade 8 / Alloy | HDG |
| Parameter | Specification |
| Manufacturing Process | Hot forging – continuous grain flow, no welded joints |
| Strength Grades | 8.8 / 10.9 / 12.9 / Grade 8 Alloy / A2-70 (304) / A4-80 (316) |
| Safety Factor | 5:1 per ASME B30.26 (WLL = Breaking Load ÷ 5) |
| Angle Loading Capability | Shoulder eye bolts: up to 45° from vertical (with WLL de-rating) |
| Plain (non-shoulder) eye bolts: vertical load only | |
| Standards Compliance | DIN 580, ISO 3266, ASME B18.15, EN 13889, CE marked |
| Testing & Certification | 100% proof load test; Mill Test Certificate (MTC) per batch; optional DNV / ABS / Lloyds |
| Surface Finishes | Zinc Plated (clear/yellow/blue), Hot-Dip Galvanized (HDG), Black Oxide, Nickel Plated, Dacromet, PTFE coated |
| Custom Options | Extended shanks (up to 350 mm), slotted collar eyes, non‑standard thread pitches (UNC/UNF/BSW), lasered WLL markings |
| Torque Recommendation | For M12 Grade 8.8 – 50 N·m final torque; use 2‑step tightening (60% then 100%) for even collar seating |
Main Applications of Sinsun Eye Bolts
Discover key applications of Sinsun eye bolts in industrial lifting, marine rigging, construction fixing and mechanical equipment anchoring for multiple industries.
Wood Structure & Light Decoration Projects
● Lag eye bolts are used for fast anchoring wooden buildings, furniture suspension and light decoration components. Self-tapping shank locks directly into wood without the need for pre-drilling and nut matching. The structure is designed to increase installation efficiency and reduce the cost of auxiliary accessories. They are practical fasteners for civil decoration and wooden engineering works.
Mechanical and electrical Installation
● Standard and shoulder eye bolts are used for lifting and fixing motors, pumps, ventilation equipment and electrical cabinets. Shoulder eye bolts distribute lateral stress to prevent bolt deformation when pulled off-set. Close fitting with precise thread matching will not loosen equipment vibration. They reduce the frequency of maintenance of mechanical operation systems.
Marine & Offshore Engineering
● 316 stainless steel eye bolts for marine deck rigging, offshore platform fixing and ship equipment anchoring. They are resistant to salt water corrosion and to ultra violet ageing in difficult coastal environments. The smooth eye loop protects marine ropes and steel cables from wear and breakage. These bolts have long-term stable performance for offshore infrastructure facilities.
Structural and construction fixings
● Galvanised eye bolts and long eye bolts are extensively used for fixing building formwork, suspension for steel structures and anchoring of precast components. The long eye bolt's large shank allows installation into thick concrete and steel plates. Hot-dip galvanised coatings provide long-lasting outdoor anti-rust protection. The structural fixings they provide are reliable and suitable for long-term construction projects.
Manufacturing Rigging and Lifting Work
● Eye bolts are used as core connection points for industrial cranes lifting and equipment. The high-strength eye bolts prevent structural failure during hoisting when bearing heavy loads.Swivel eye bolts prevent cable twisting hazards in dynamic multi-angle lifting applications.When factory equipment is handled or large components are installed, these bolts ensure operational safety.
Q: What are eye bolts mainly used for?
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A: Eye bolts focus on lifting, rigging, anchoring and suspension fixing for industrial, marine and construction equipment.
Q: Are stainless steel eye bolts suitable for marine use?
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A: 316 stainless steel eye bolts deliver excellent saltwater corrosion resistance for long-term marine scenarios.
Q: Why choose long eye bolts for concrete fixing?
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A: Long shank designs achieve deep embedding and enhance overall fixing stability for thick concrete structures.
Q: Do you support custom eye bolt sizes?
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A: We customize eye diameter, shank length and special load grades for unique project demands.
Q: What is the difference between shoulder and ordinary eye bolts?
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A: Shoulder eye bolts support 45 N angular loads, while standard eye bolts only adapt to vertical tension.
Q: What scenarios need heavy duty eye bolts?
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A: Heavy duty eye bolts apply to large machinery lifting and heavy-load industrial rigging projects.
Q: Can galvanized eye bolts prevent outdoor rust effectively?
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A: Hot-dip galvanized eye bolts provide long-term anti-rust protection for outdoor construction environments.
Q: Are swivel eye bolts necessary for dynamic lifting?
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A: Yes, swivel structures avoid cable twisting and improve safety for frequent multi-angle lifting.
sinsun hardwarewhy sourcing your eye bolts from sinsun makes sense？
You have choices. Lots of them. Local distributors with high markups. Random Alibaba factories with questionable metal batches. Big box suppliers that treat your lifting safety as just another SKU.
We approach it differently.
Sinsun has been manufacturing forged fasteners in Ningbo, China, since 2006. Our ISO 9001‑certified factory operates 300+ CNC stations, in‑house heat‑treatment lines, and a dedicated NDT (non‑destructive testing) lab. Every Sinsun eye bolt undergoes:
Raw material chemical analysis (OES spectrometer),
Hot forging with continuous grain flow,
Thread rolling (not cutting – for fatigue strength),
100% proof load test to 2.5x WLL,
Magnetic particle or dye penetrant inspection on all critical lifting rings.
We do not skip steps. We do not batch‑test only the first piece. Every lifting eyebolt that leaves our dock carries a Mill Test Certificate and a laser‑etched traceability code.
What does that mean for you? Traceability. Safety. Consistency order after order.
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And we make cross‑border procurement genuinely painless
Most of all, we treat lifting safety as the serious matter it is. When you contact us for a quote, we will ask about your application: is it vertical or angular? Indoor or marine? Static or dynamic load? We then recommend the right grade, finish, and style – not just the cheapest stock item in our catalog.
Pay in your local currency
Euro, Sterling, Australian Dollar, Brazilian Real, Turkish Lira, South African Rand, Thai Baht, and many others.
Door‑to‑door logistics
Our team handles customs paperwork, port coordination, and last‑mile delivery to your warehouse.
Low minimum order quantities
100 pieces for standard eye bolts; mix thread sizes and finishes in one container.
Customization without chaos
Extended shanks, non‑standard thread pitches, special laser markings, third‑party witness testing – we handle it in‑house.
Keep In Touch
TO KNOW MORE ABOUT Sinsun, PLEASE CONTACT US！
We are committed to providing you with the best quality service and look forward to communicating with you to solve problems together and bring you a better experience.
our experts will solve them in no time.
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Прямая продажа с завода
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Гарантия качества ISO9001, CE
Как многопрофильный поставщик, мы прошли контроль качества ISO 9001:2000, и все серии производимых ограждений соответствуют международным сертификатам CE.
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У нас безопасная и надёжная логистика для доставки. Мы предлагаем профессиональное руководство по установке.
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