Why Every Fixing in Your Food Plant Needs to Be Metal Detectable
Posted by Cris Varghese on 18th Mar 2026
I want to start with a scenario that's probably more common than anyone in food manufacturing likes to admit.
An overhead cable tie — standard nylon, been there three or four years — develops a crack from constant vibration. One shift, it gives. Half of it drops into an open product run. Nobody spots it. It goes through inspection undetected. Ten thousand units ship.
Two weeks later, you've got a customer complaint, an investigation, and a recall on your hands. The brand damage alone is hard to put a number on, but the direct costs — fines, product destruction, the audit that follows — are easily in the tens of thousands.
"That cable tie cost less than 5p. A metal detectable version would've been 20p. I think about that every time I hear someone say detectable fixings aren't worth the extra cost."
The problem nobody writes a risk assessment for
Fixings — cable ties, clips, hose anchors, fasteners — are so cheap and so common that they become background noise in most facilities. People do HACCP for knives, gloves, equipment. Nobody's sitting down to write a risk assessment for a cable tie. And that's exactly why they end up causing recalls.
If you've got standard nylon ties on overhead cable runs, on hose bundles above the line, on suspended equipment — you've got non-detectable fragments that could fall into open product. In most plants, we're talking hundreds of them. And they're not just a breakage risk either. Ties that get cut during maintenance and aren't properly removed. Tails that aren't trimmed flush. Old ties that crack from UV exposure or from the cleaning chemicals you're running through the facility. None of it triggers your detection equipment.
You'd never use a non-detectable knife in a food zone. So why are you still using non-detectable cable ties?
The honest answer, in most places I've spoken to, is habit. It's what gets ordered. The site hasn't had a recall. The last auditor didn't push on it. But "hasn't failed yet" isn't a food safety standard — it's just luck.
What does metal detectable actually mean?
The short version: they look and work exactly like regular cable ties. Same sizes, same installation, same tensile strength. The difference is a metallic additive blended into the nylon during manufacture. If a fragment breaks off and enters your product stream, your metal detector catches it, the product gets rejected, and the incident stays internal. The problem is contained before anything ships.
Metal detectable vs X-ray detectable
There's also X-ray detectable (barium sulphate additive, shows under X-ray rather than metal detection), and some fixings are certified for both. Which you need depends entirely on what inspection equipment you're running. It's worth checking that before you order — a metal-detectable tie won't reliably trigger an X-ray system, and vice versa. The wrong spec gives you a false sense of security, which is arguably worse than nothing.
Why they're blue — and why does it actually matter?
Every detectable cable tie you've ever seen is blue. That's a BRC standard, not a branding choice, and there's a practical reason behind it.
Blue just doesn't appear in food. Meat, bread, dairy, produce — none of it is naturally blue. A blue fragment on a production line is immediately obvious to any operator paying attention. So you get two lines of defence: someone spots it visually first, and if they miss it, the detector catches it downstream.
In practice, we'd always recommend specifying blue for every food zone fixing — even if your facility uses other colours for different equipment.
Make blue the non-negotiable for anything detectable, and it removes all the ambiguity. Your team doesn't have to remember which colour is which. Blue means detectable. Simple.
What do HACCP and BRC expect from you?
This isn't optional — it's what the standards require.
HACCP requires you to identify physical contamination as a hazard and have documented control measures in place. Fixings above open food lines are a contamination source. Your plan either needs to show you're using detectable fixings or formally justify why you've assessed it as acceptable not to. "We've always used standard ties" won't survive that conversation.
| Standard | What they want to see |
|---|---|
| HACCP | Documented physical contamination controls. Fixings above open food lines identified as a hazard with control measures in place. "We've always used standard ties" won't survive that conversation. |
| BRC Issue 9 | Evidence that non-detectable fixings have been replaced or formally risk-assessed. A colour-coded system. Fixings on your maintenance and inspection schedule. Documentation they can point to. "We haven't had a problem" isn't evidence. |
The question isn't usually "do you use detectable fixings?" It's "can you demonstrate that every non-detectable fixing has been formally assessed?" If the answer's complicated, you've got a gap.
Switching to detectable fixings across your food zones is the cleanest way to close it. It removes the tracking complexity of which area has which type of fixing, stops standard ties migrating from non-food areas without anyone noticing, and makes the audit conversation straightforward.
Where do you start?
You don't need to replace everything overnight. But you do need to start somewhere.
Walk your food zones and look up. Most of the risk is overhead — cable runs above open product, fixings on suspended equipment, hose bundles on processing machinery. Count the standard nylon ties in positions where a fragment could fall into product. That's your priority list.
Check what inspection technology you're running — metal detection, X-ray, or both. That tells you which detectable fixing spec to order.
Swap like for like — just in blue. Metal detectable cable ties come in the same sizes as standard ties. Replace like for like. Update your HACCP plan to document it.
Add fixings to your pre-production checklist. Detectable or not, a cracked or missing fixing is still a hazard.
The simplest approach
Switch to detectable fixings facility-wide, not just in food zones. The cost difference is marginal. The benefit is that you eliminate every grey area, and when an auditor asks, the answer is simply "yes, everywhere."
A few questions we get asked a lot
Do all fixings in the plant need to be detectable?
Technically, only the ones where a fragment could reach open food. In practice, most manufacturers end up going facility-wide — because monitoring which zones are "safe" for standard fixings is more effort than the cost saving justifies, and because standard ties can migrate from non-food areas without anyone realising.
What's the difference between metal detectable and X-ray detectable?
Metal detectable triggers conventional metal detection equipment. X-ray detectable shows up under X-ray inspection. Some products are certified for both. Check your facility's setup before you order — the wrong type doesn't give you the protection you think it does.
Why always blue?
Blue contrasts with virtually every natural food colour, making fragments visible to operators before they even reach a detector. BRC standardised it for exactly that reason — visual detection is your first line, electronic detection is your backup.
What does BRC Issue 9 actually say about this?
It requires documented physical contamination controls, including detectable materials in food zones where practicable. Auditors want to see evidence that non-detectable fixings have been replaced or risk-assessed, and that fixings are included in your maintenance programme. "We haven't had a problem" isn't evidence.
Ready to make the switch?
Our metal detectable cable ties are blue, BRC-compliant, and available in the same sizes as standard ties. Straightforward swap — and one less thing to worry about at your next audit.
Shop Metal Detectable Cable Ties