The Cobra Grade 80 clevis c hook is an open C-profile hook for applications where a load has to be lifted off a bar, spindle or coil eye without threading a closed fitting through it. The open profile is the point: it engages and releases quickly.
Temperature: the Cobra Grade 80 range is rated -20 °C to +200 °C. The Kito Grade 8 range runs to +400 °C. Where hot work is involved, check which range you are ordering — they look similar and both are red.
Key Features
- Open C profile: Engages a bar, spindle or coil eye without threading through
- Quick to engage and release: Which is the whole reason to choose one over a sling hook
- Grade 80 alloy steel: Meeting the Working Load Limit performance requirements of BS EN 1677-2
- -20 °C to +200 °C: Narrower than the Kito ranges — check before specifying for hot work
- 4 sizes: Chain 7/8 mm upwards
- Red painted finish: Identifies the Cobra range on site — never repaint a lifting fitting
- Fully marked: Material grade, manufacturer’s ID, size, product ID mark and traceability code, with certificate
Technical Specifications
| Product Code |
Part No. |
Chain Dia (mm) |
A (mm) |
B (mm) |
E (mm) |
H (mm) |
K (mm) |
L (mm) |
| G80CCH8 |
K5001 |
7/8 |
9.5 |
35 |
20 |
28 |
90 |
136 |
| G80CCH10 |
K5002 |
10 |
13 |
46 |
29.5 |
39.5 |
127 |
189 |
| G80CCH13 |
K5003 |
13 |
16.5 |
59 |
39.5 |
52 |
166.5 |
246 |
| G80CCH16 |
K5004 |
16 |
18.5 |
72 |
46.5 |
59 |
206 |
298 |
Working Load Limits and full dimensional data for every size are in the Cobra Grade 80 chain sling information sheet.
BS EN 1677-2 | Grade 80 | -20 °C to +200 °C | LOLER Ready
Meets the Working Load Limit performance requirements of BS EN 1677-2. Grade 80 alloy steel with a red painted finish. Marked with material grade, manufacturer’s identification, size, product ID mark and traceability code, and supplied with a certificate. Rated -20 °C to +200 °C. Under LOLER 1998, thorough examination by a competent person at intervals not exceeding 12 months.
Suitable Applications
Used in building and repairing Cobra Grade 80 chain sling assemblies across general lifting, fabrication, machinery handling, construction and plant maintenance. Keep the whole assembly to one grade — mixing grades derates the sling to the lower and it must be marked accordingly. For work above +200 °C, the Kito Grade 8 range is rated to +400 °C.
More About This Product
Shackles are the most-handled component in any lifting operation, and that is precisely why they wear out first. A sling gets rigged and derigged; a shackle gets rigged, derigged, dropped, driven over, thrown into a box and picked up by whoever needs one. Most lifting gear fails from a single overload; shackles fail from accumulated inattention.
The grade markings matter more than most people realise. A Grade 6 high tensile shackle to BS EN 13889 and a Grade 8 alloy shackle look similar and share the same body shape, but the alloy version carries considerably more at the same size. Once a shackle is in a box with fifty others, the only way to tell them apart is the marking — which is why an unmarked shackle has to be scrapped no matter how good it looks.
Understanding the Load Path
A shackle has two distinct load-bearing elements and they do different jobs. The bow takes the sling; the pin takes the load. Reverse that — put the sling on the pin and the load on the bow — and two things happen. The sling bears on a smaller radius than it was designed for, and any movement in the sling starts to rotate the pin.
On a screw collar pin that rotation is the failure mechanism. A sling shifting under a settling load, or vibration transmitted from plant nearby, will slowly unscrew the pin over minutes or hours. It rarely happens quickly enough for anyone to see it happening.
The second consideration is angle. A shackle loaded in line with the pin carries its full rating. Loaded at an angle across the bow it carries substantially less, and published derating tables cover a limited range of angles — beyond that range no figure is published because none applies. On a multi-leg sling every leg is at an angle by definition, which is why the bow shackle exists and why putting a multi-leg sling into a dee shackle is a genuine mistake rather than a preference.
How to Use
- Match the chain size exactly: The fitting is machined for one chain diameter.
- Check the assembly is one grade throughout: Mixing grades derates the whole sling.
- Confirm pins are fully engaged and secured: Before every lift.
- Check the temperature rating: -20 °C to +200 °C on this range. The Kito Grade 8 range goes further.
- Recertify after building or altering an assembly: Proof testing and certification by a competent person is required.
- Do not modify: Never weld, heat, machine, drill or repaint.
Warning: A C hook has no safety catch and relies on load and geometry to stay engaged. Never use where the load could swing free or the hook could be unloaded in service.
Safety Information
- Never exceed the marked Working Load Limit.
- Use components of the same grade throughout the assembly.
- Load must bear in the throat, never on the tip.
- Operating range -20 °C to +200 °C.
- Withdraw any fitting showing wear beyond the manufacturer’s stated limit, distortion, cracks or elongation.
- Never weld, heat treat, machine or repaint.
- Assemblies built or altered require proof testing and recertification.
- Thorough examination by a competent person required at intervals not exceeding 12 months under LOLER 1998.
Inspection and Maintenance
Measure the throat opening against the original dimension at every thorough examination, since throat opening is the classic evidence of overload and develops progressively rather than suddenly. Check the tip and throat bearing surfaces for gouging and wear and withdraw at the manufacturer’s stated wear limit. Confirm the safety catch springs closed under its own tension and sits against the nose with no gap. Inspect the clevis pin for straightness, wear and full engagement, and the pin bores for elongation. Confirm the grade marking and traceability code remain legible.
Downloads
Frequently Asked Questions
Q: Cobra Grade 80 or Kito Grade 8?
Same strength grade under different naming, but the temperature ratings differ: Cobra is -20 °C to +200 °C, Kito runs to +400 °C. For foundry, forge or heat treatment work that decides it. Both are red, so buy by code.
Q: Can I mix this with Grade 10 components?
Physically yes, but the assembly must then be derated to Grade 80, marked accordingly and recertified. Simpler to keep an assembly to one grade.
Q: Why must I not repaint it?
The red finish identifies the grade, and paint conceals the cracks and wear an inspection is looking for. Repainting a lifting fitting is grounds for withdrawal.
Q: What does the traceability code do?
It ties the fitting back to its manufacturing batch and certificate. A fitting whose marking has become illegible must be withdrawn regardless of its condition.
