Fischer High Performance Anchor FH II SK - 15/25 - Black
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Product Information
Full details
The Fischer FH II 15/25 SK is an industrial-grade anchor designed for professionals and skilled DIYers who require reliable, heavy-duty fastening in cracked or non-cracked concrete. Its primary benefit is the specialized sleeve mechanism that ensures high load-bearing capacity and a flush-mounted finish, making it perfect for safety-critical fixtures like railings and ladders. However, users should note that it is specifically engineered for concrete applications and requires precise hole drilling to function correctly.
All features
| Colour | Black |
|---|---|
| Model Part Number | FH II 15/25 SK |
| Brand | Fischer |
Extended Product Information
FAQs
Can this anchor be used in brick or block walls?
No, the FH II series is specifically designed for use in concrete, both cracked and non-cracked.
Does it require a specific torque tool?
While a standard wrench can work, a torque wrench is recommended to ensure you meet the load-bearing specifications of the manufacturer.
Is the FH II SK removable?
These anchors are designed for permanent or semi-permanent structural fastening and are not intended to be reused once expanded.
What does the 15/25 mean in the product name?
This generally refers to the drill hole diameter and the maximum fixture thickness the anchor can accommodate.
Can I use this for outdoor applications?
Yes, provided the environment does not cause rapid corrosion. For highly corrosive environments, check for stainless steel variants.
Troubleshooting
Anchor spins in the hole during tightening
The drill hole may be too large. Ensure you are using the correct diameter masonry bit and that the hammer drill is not wobbling during operation.
Anchor does not sit flush
Verify the countersunk hole in your fixture is deep enough to accommodate the head profile of the FH II SK.
Difficulty reaching specified torque
Ensure the hole is thoroughly cleared of concrete dust; dust buildup can prevent the sleeve from expanding correctly.
Pros and Cons
Pros
- Provides exceptionally secure fastening in challenging concrete environments
- Flush finish thanks to the countersunk head profile
- Reliable torque management via the integrated plastic ring
- Certified performance in both cracked and non-cracked concrete
Cons
- Not suitable for use in masonry or hollow materials
- Requires professional-grade drilling equipment for precise hole diameter
- Once installed and expanded, it is difficult to remove without damaging the concrete
Setup, Compatibility & Care
To achieve maximum load-bearing performance, use a hammer drill to create a hole that matches the exact specifications of the FH II 15/25 SK. Ensure the hole is cleaned of drilling dust using a blow-out pump or brush, as residual debris can interfere with the expansion mechanism.
- Drill Size: Use a drill bit that matches the nominal diameter specified for the 15/25 model.
- Installation: Place the anchor through the fixture and tighten using a torque wrench to ensure the recommended torque is reached without over-tightening.
- Care: Being a heavy-duty steel component, keep the anchors in a dry environment to prevent oxidation prior to installation. Once installed in an exterior environment, ensure the flush head is sealed if there is a high risk of moisture penetration.