TOBO GROUP LTD
| Payment Terms | T/T, Western Union |
| Supply Ability | 15tons per month |
| Delivery Time | 15-30 Workdays |
| Packaging Details | Standard Shipping Package |
| Productname | Eye Bolts Nuts |
| Size | M6-M100,M4-M54,can be customized,M2-M64 |
| Standard | DIN 580 |
| Type | Forged Eye Bolt |
| Package | Carton/Pallet |
| Head Style | Round |
| Temperaturerange | -20°C to 120°C |
| Thread Direction | Right Hand |
| Brand Name | TOBO |
| Model Number | Shouldered Eye Bolt with Hex Nut |
| Certification | ISO/TUV/SGS |
| Place of Origin | Shanghai, China |
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Product Specification
| Payment Terms | T/T, Western Union | Supply Ability | 15tons per month |
| Delivery Time | 15-30 Workdays | Packaging Details | Standard Shipping Package |
| Productname | Eye Bolts Nuts | Size | M6-M100,M4-M54,can be customized,M2-M64 |
| Standard | DIN 580 | Type | Forged Eye Bolt |
| Package | Carton/Pallet | Head Style | Round |
| Temperaturerange | -20°C to 120°C | Thread Direction | Right Hand |
| Brand Name | TOBO | Model Number | Shouldered Eye Bolt with Hex Nut |
| Certification | ISO/TUV/SGS | Place of Origin | Shanghai, China |
| Material | Carbon Steel (Grade 5 / Grade 8 / Stainless 316) | Color | Zinc Silver / Yellow Gold / HDG Gray / Passivated Silver |
|---|---|---|---|
| Thread Diameter | 1/4″ – 1‑1/2″ (M6 – M36) | Working Load Limit (WLL) | 200 lbs – 10,000 lbs (shouldered type) |
| Length (Shank) | 3/4″ – 12″ (custom) | Head Style | Forged Eye (Shouldered or Non‑Shouldered) |
| Drive / Wrench | Hex nut (heavy hex or jam) | Point | Threaded shank with flat or chamfered point |
Shouldered Eye Bolt with Heavy Hex Nut – Lifting Grade, Forged, ASTM F541
Forged carbon/alloy steel eye bolts with matching heavy hex nuts. Shouldered design allows angular lifting up to 45°. Proof load tested to 2× WLL, magnetic particle inspected (MPI), and WLL stamped on every bolt. Ideal for overhead lifting, rigging, and marine tie‑downs.
Forged one‑piece construction (no weld or bent rod)
Shouldered collar for side‑load capability (0° – 45°)
High tensile strength (120,000 – 150,000 psi)
Corrosion resistant finishes (zinc, HDG, stainless)
Full traceability with WLL stamping
MPI crack‑free certified
Hex head eye bolts are made from carbon steel (Grade 5 or Grade 8) , alloy steel (4140/4340) , or stainless steel 304/316. Nuts are supplied in matching grade (ASTM A563 Grade A/B or stainless).
| Density (g/cm³) | 7.85 (carbon steel) / 7.95 (stainless) |
|---|---|
| Weight per 100 pcs (1/2″ x 2″ bolt + nut) | ~2.8 kg |
| Magnetic property | Carbon: magnetic / Stainless 304/316: non‑magnetic |
| Parameter | Grade 5 (Carbon) | Grade 8 (Alloy) | Stainless 316 |
|---|---|---|---|
| Tensile strength (MPa) | 830 | 1035 | 515 |
| Yield strength (MPa) | 630 | 896 | 205 |
| Hardness (HRC) | C25–34 | C33–39 | HB ≤ 217 |
| Proof load (MPa) | 585 | 827 | – |
| WLL for 1/2″ shouldered (lbs) | 2,000 | 3,000 | 1,500 |
| Parameter | Value (non‑critical for lifting hardware) |
|---|---|
| Conductivity | Carbon steel: conductive / Stainless: low conductivity |
| Suitability for electrical grounding | Yes (carbon steel) |
| Parameter | Carbon Steel | Stainless 316 |
|---|---|---|
| Normal working temperature | -40°C to 200°C | -200°C to 400°C |
| Brittle temperature | -40°C | -200°C (cryogenic tough) |
| Melting temperature | ~1400°C | ~1400°C |
| Thread diameter (d1) | 1/2″ – 13 UNC |
|---|---|
| Shank length (L) | 2″ (standard), other lengths available |
| Eye inner diameter (ID) | 1.0″ |
| Eye outer diameter (OD) | 1.75″ |
| Shoulder diameter | 0.75″ |
| Nut type | Heavy hex (ASTM A563 Grade A) |
| Nut height | 0.44″ |
| Nut wrench size | 3/4″ |
Note: All sizes in inches for inch series; metric (M6–M36) available upon request.
| Dimension | Tolerance |
|---|---|
| Thread diameter (external) | Class 2A (per ASME B1.1) |
| Shank length (L) | ±0.125″ |
| Eye inner diameter | ±0.030″ |
| Shoulder diameter | ±0.020″ |
| Nut height | ±0.010″ |
| Nut across flats | ±0.015″ |
General tolerances per ASME B18.2.1 for eye bolts and ASME B18.2.2 for nuts.
Forged Strength
One‑piece hot forging eliminates welded or bent‑rod weak points. Provides ductile overload warning before fracture.
Angular Load Capability (Shouldered Type)
The integral shoulder transfers side loads into the mounting surface, allowing safe lifting at angles up to 45° from vertical.
Proof Load Tested
Each batch is verified to 2× working load limit (WLL). Permanent deformation indicates overload – visual safety check.
Magnetic Particle Inspection (MPI)
All lifting‑grade eye bolts are MPI inspected to reveal surface or subsurface cracks that could cause sudden failure.
Clear WLL Marking
Size, grade, and WLL are stamped on the eye of every shouldered bolt – no guesswork in the field.
Corrosion Resistance
Zinc plating (96 hr salt spray), hot dip galvanizing (1,000+ hr), or stainless 316 (passivated, marine grade).
Matching Heavy Hex Nut
Nut hardness is slightly lower than bolt to promote bolt failure first (desired mode). Wide wrench flats prevent rounding.
Vibration Resistance
Use two nuts (jam + heavy hex) locked together to prevent loosening under dynamic loads.
Eye Bolts & Nuts are widely used for overhead lifting, rigging, mooring, and tie‑down applications where certified strength and angle loading are required.
Overhead lifting of machinery, dies, and motors
Marine mooring cleats and boat lift eyes
Construction: concrete insert lifting, structural steel sling points
Vehicle recovery and trailer tie‑down rings
Scaffolding fall‑arrest anchor points
Industrial maintenance: pump/motor lifting eyes
Offshore and shipboard cargo securing
| Size | Material | Qty / Box |
|---|---|---|
| 1/4″ – 20 x 1″ (shouldered + nut) | Grade 5 / Zinc | 100 sets |
| 3/8″ – 16 x 1‑1/2″ (shouldered + nut) | Grade 8 / Yellow | 50 sets |
| 1/2″ – 13 x 2″ (shouldered + nut) | Grade 5 / HDG | 25 sets |
| M10 x 50 mm (shouldered + nut) | Stainless 316 | 20 sets |
Custom lengths and bulk packing available on request.
FAQ
1. Are you trading company or manufacturer ?
We are manufacturer ,You can see the certification.
2. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
Company Details
Business Type:
Manufacturer,Exporter,Trading Company,Seller
Year Established:
2010
Total Annual:
5000000-6000000
Ecer Certification：
Verified Supplier
TOBO GROUP LTD is a professional fastener manufacturer and exporter in China. We produce various types of fasteners (include non-standard) in GB, DIN, BS, ANSI/ASME, IFI, ISO, and JIS with 300 tons of monthly productivity. Our main products are bolts, nuts, screws, threaded rods, plain was... TOBO GROUP LTD is a professional fastener manufacturer and exporter in China. We produce various types of fasteners (include non-standard) in GB, DIN, BS, ANSI/ASME, IFI, ISO, and JIS with 300 tons of monthly productivity. Our main products are bolts, nuts, screws, threaded rods, plain was...
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