Same plug.
Now it warns you.
The Magnetic Hub Plug drops into the wheel-end oil-fill port you already service. Its magnet pulls the steel shavings a failing bearing sheds out of the hub oil, so trouble shows up on a 30-second pretrip look, not on the shoulder. No battery. No subscription. No new SKU to train techs on.
Drag to rotate
Bearings don't fail loud. They fail late.
A scored wheel bearing grinds metal into the hub oil for thousands of miles before it seizes. By the time you hear it, you are looking at a roadside breakdown, a failed DOT inspection, or a wheel-off. The warning was in the oil the whole time. Nobody could see it.
Hold it. See exactly what ships.
The real molded part, every angle. Tap a thumbnail to look it over close up.
Built to replace one part you already pull.
It seats in the same port as your standard rubber oil plug. The directional arrow points the collector toward the bearing. The magnet sits in the oil path and holds onto any steel the bearing sheds.
- 01Domed sealing body. Plugs the fill port and keeps the hub oil where it belongs.
- 02Collector arm + magnet. Reaches into the oil toward the bearing and captures shavings.
- 03Readable face. Pull it on a pretrip, wipe the magnet, read the metal. Clean is good. Fuzzy is a warning.
Install once. Read it every pretrip.
Pull the old plug
Remove the standard rubber oil fill plug from the hub cap. No special tools, no hub teardown.
Push in the Magnetic Hub Plug
Seat it in the same port with the arrow pointing toward the bearing. It seals like the plug it replaces.
Pull, wipe, read
On every pretrip, pull it and check the magnet. Metal fuzz means the bearing is shedding steel. That is your early warning.
Mechanical simplicity beats another sensor to babysit.
Collects metal shavings
The magnet pulls steel out of the hub oil and holds it where you can see it.
No electronics or battery
Nothing to charge, pair, or replace. It cannot go dark on you.
Retrofits in seconds
Replaces the existing oil fill plug. No hub teardown, no new hardware.
No subscription
Buy it once. There is no monthly fee and no telematics contract behind it.
Sold in 2-packs
Packaged per axle pair so you can outfit wheel-ends two at a time.
Patented design
A purpose-built collector, not a generic drain magnet. US Patent 11,433,700.
No renders here. This is what ships.
The molded plug, the sealing ribs, the magnet, the readable face. Up close.
What one missed bearing costs your fleet.
Move the sliders. This is a planning estimate, not a quote. Adjust the failure cost to your own experience.
A standard 18-wheeler runs about 10 oil wheel-ends. A 24-wheeler runs about 14. Steer-axle grease caps do not count.
A roadside hub service call runs about $2,500 per wheel-end. A full wheel-off, with towing, downtime, cargo, and liability, runs tens of thousands. Drag the cost slider to your worst case.
every wheel-end on a 20-truck fleet at $2,500 a roadside call
Get fleet pricingDoes it fit your wheel-ends?
The Magnetic Hub Plug is built around the industry-standard oil hub cap fill port. It fits standard oil wheel-ends on drive and trailer axles.
The details, on the table.
Reference figures shown below. Exact dimensions and material certs are shared with fleet and distributor inquiries.
| Function | Magnetic early-warning oil plug |
|---|---|
| Replaces | Standard hub oil fill plug |
| Host cap reference | Stemco 6-1/4" OD oil hub cap |
| Body material | Oil-resistant elastomer (rubber / urethane) |
| Collector | Permanent magnet on directional arm |
| Axles | Drive & trailer (oil-lubricated) |
| Sold as | 2-pack (per axle pair) |
| Power | None, fully mechanical |
See every angle in the product section above.
Three ways to buy.
Pricing is set per program. Tell us your volume and we will send numbers the same day.
- One axle pair (2 plugs)
- Fits Stemco 6-1/4" oil caps
- Ships to your door
- Outfit every wheel-end
- Tiered per-unit discount
- Spec sheet + install guide
- Dedicated point of contact
- Case / pallet quantities
- Wholesale margin
- Co-branded options
A patented safety part in a market that runs on uptime.
Wheel-end failures are a known, expensive, recurring problem across every commercial fleet. The Magnetic Hub Plug solves it mechanically, with no electronics, no subscription, and no install friction. We are opening conversations with partners who want in early.
Request the investor deck
Patent (US 11,433,700), manufacturing plan, unit economics, and go-to-market, sent to qualified inquiries.
Request the deckGet pricing, fitment, or the deck.
Tell us what you run. We answer fast, usually the same day.