William Hackett Grade 10 Clevis Self Locking Hook
WHL-CSLH-G10
William Hackett Hack10 Grade 10 Clevis Self Locking Hook, 1.4t–19t WLL. Locks automatically under load. DGUV H-Mark, EN 1677-3.
From: £16.80£20.16 Exc VATInc VAT
Description
William Hackett Hack10 Grade 10 Clevis Self Locking Hook
The William Hackett Hack10 Grade 10 Clevis Self Locking Hook has a special latch mechanism that locks automatically when the hook comes under load. Once the load is relieved, the operator presses the latch trigger by hand to release the lock. This gives a high level of security against accidental disengagement during the lift.
Its clevis attachment fits directly onto Hack10 Grade 10 chain without a separate connector. The hook is manufactured from alloy steel in accordance with EN 1677-3, ASTM A952/A952M and DIN PAS 1061, and is suitable for use in chain slings certified to EN 818-4.
Automatic Locking Under Load
Unlike a standard sling hook, the self locking hook closes and locks itself as soon as load is applied. The hook can’t open while it is loaded. The lock only releases when the load has been taken off and the trigger is operated by hand. This makes it a strong choice where load security is critical.
DGUV Test H-Mark Certified
The Hack10 clevis self locking hook has been independently verified and awarded the DGUV Test H-Mark for lifting components, under number H83. This third-party accreditation gives extra assurance of the hook’s quality and performance, on top of the manufacturer’s own testing.
25% Stronger Than Grade 8
The Hack10 clevis self locking hook is 25% stronger than its Grade 8 equivalent. This gives a higher Working Load Limit without needing a larger-diameter chain sling. You can often specify a smaller chain size than Grade 8 for the same capacity, which means lighter rigging that is easier to handle and position.
Tested for Quality and Traceability
William Hackett crack-detects every self locking hook after heat treatment and proof load tests it to 2.5 times its Working Load Limit. These checks help confirm the integrity of each component before it enters service.
Wide Operating Temperature Range
The Hack10 clevis self locking hook can be used from -40°C to +200°C with no reduction in Working Load Limit. This makes it suitable for cold outdoor sites, renewables work and warmer industrial settings.
Size & Compatibility
The Hack10 clevis self locking hook is available for chain sizes from 6mm to 22mm, with Working Load Limits from 1.4 tonnes to 19 tonnes. It is designed to be used with:
- Hack10 Grade 10 lifting chain of the matching size
- Hack10 single and multi-leg chain sling assemblies
- Other Hack10 components within a Grade 10 sling
For general lifting where a self locking latch isn’t required, see the Hack10 clevis sling hook. Where the hook needs to rotate under load, the Hack10 swivel self locking hook is also available.
Ideal Applications
The William Hackett Hack10 Grade 10 Clevis Self Locking Hook is suitable for:
- Lifts where secure, locked engagement of the hook is essential
- Building and repairing Grade 10 chain slings
- Construction lifting operations
- General industrial and heavy engineering lifting
- Transportation and haulage
- Renewables, including wind energy installation and maintenance
Technical Specifications
| Specification | Details |
|---|---|
| Brand | William Hackett |
| Range | Hack10 |
| Product | Grade 10 Clevis Self Locking Hook |
| Grade | Grade 10 |
| Attachment Type | Clevis (fits directly to chain) |
| Latch | Self locking under load; manual trigger release |
| Material | Alloy steel |
| Working Load Limit | 1.4t – 19t, depending on size |
| Chain Size Range | 6mm – 22mm |
| Strength | 25% stronger than Grade 8 equivalent |
| Proof Load Test | 2.5 x WLL |
| Safety Factor | 4:1 |
| Operating Temperature | -40°C to +200°C without reduction in WLL |
| Testing | Crack detected after heat treatment; proof load tested |
| Standards | EN 1677-3, ASTM A952/A952M and DIN PAS 1061; suitable for chain slings certified to EN 818-4 |
| Third-Party Accreditation | DGUV Test H-Mark, number H83 |
| Sectors | Construction, Industrial, Transportation, Renewables |
Size & Dimension Chart
| Part Code | WLL (t) | Chain Size (mm) | A (mm) | B (mm) | C (mm) | D (mm) | E (mm) | F (mm) | G (mm) | H (mm) | I (mm) | Box Qty | Mass (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10-H05-06 | 1.4 | 6 | 8.0 | 32 | 28.0 | 31.5 | 96 | 73 | 15.0 | 131 | 20 | 40 | 0.50 |
| 10-H05-08 | 2.5 | 8 | 9.5 | 36 | 36.0 | 40.0 | 121 | 90 | 20.0 | 163 | 26 | 25 | 0.90 |
| 10-H05-10 | 4.0 | 10 | 12.0 | 46 | 45.0 | 46.0 | 144 | 108 | 26.0 | 194 | 27 | 14 | 1.45 |
| 10-H05-13 | 6.7 | 13 | 15.0 | 59 | 53.6 | 66.0 | 182 | 137 | 32.5 | 251 | 40 | 6 | 2.90 |
| 10-H05-16 | 10.0 | 16 | 18.5 | 70 | 61.0 | 75.0 | 220 | 168 | 38.0 | 303 | 50 | 3 | 5.50 |
| 10-H05-20 | 16.0 | 20 | 25.0 | 85 | 76.5 | 80.0 | 235 | 190 | 50.0 | 337 | 62 | 2 | 8.60 |
| 10-H05-22 | 19.0 | 22 | 25.5 | 98 | 76.0 | 104.6 | 271 | 202 | 52.0 | 386 | 65 | 2 | 12.10 |
Dimensions refer to the William Hackett product drawing.
Capacity & Load Information
The Working Load Limit of the Hack10 clevis self locking hook depends on the size you select. The 1.4t–19t range covers the whole product range and does not apply to every size. Always match the hook to the chain size and the required WLL of the complete assembly.
In any sling, the overall WLL is set by its configuration and its lowest-rated component. Take into account any applicable reduction factors, such as shock loading, edge loading or asymmetric loading, as set out in the manufacturer’s instructions
Technical information
| Weight | N/A |
|---|---|
| Product Type | Clevis Self Locking Hook |
| Component Type | Self Locking Hook |
| WLL | 1.4t, 2.5t, 4t, 6.7t, 10t, 16t, 19t |
| Gauge | 10, 13, 16, 20, 22, 6, 8 |
| Grade | 10 |
Key Features
- William Hackett Hack10 Grade 10 clevis self locking hook
- Latch locks automatically when the hook comes under load
- Manual trigger release once the load is relieved
- Clevis attachment fits directly onto chain
- DGUV Test H-Mark certified under number H83
- 25% stronger than Grade 8 equivalent
- Higher WLL without a larger-diameter chain sling
- Manufactured from alloy steel
- Working Load Limits from 1.4 tonnes to 19 tonnes
- Available for chain sizes from 6mm to 22mm
- Manufactured in accordance with EN 1677-3, ASTM A952/A952M and DIN PAS 1061
- Suitable for use in chain slings certified to EN 818-4
- Crack detected following heat treatment
- Proof load tested to 2.5 x WLL
- 4:1 safety factor
- Operating temperature from -40°C to +200°C without WLL reduction
- Suitable for construction, industrial, transportation and renewables sectors
Safety & User Instructions
- Use the hook only with Grade 10 chain of the matching size.
- Do not mix grades within an assembly.
- Do not exceed the Working Load Limit of the hook or the complete sling.
- Make sure the clevis pin and retaining parts are fully fitted and secure.
- Check that the latch closes fully and locks before lifting.
- Never attempt to operate the trigger or open the hook while it is under load.
- Seat the load fully in the bowl of the hook; never load the hook on its tip.
- Avoid side loading, back loading and point loading of the hook.
- Inspect the hook, latch and trigger mechanism before every use for wear, cracks, deformation, nicks, corrosion or damaged springs.
- Take out of service any hook with a latch that does not close and lock correctly, or that shows damage, distortion or excessive wear.
- Avoid shock loading and sudden application of load.
- Do not use outside the -40°C to +200°C operating temperature range.
- Do not modify, weld or heat-treat the hook.
- Follow all manufacturer instructions and make sure the equipment is thoroughly examined in line with LOLER.
