What You're Looking At
This is a wheel end hub cap - not the whole hub assembly, just the cover that seals over the end of the spindle where your grease or oil sits. Stemco made the original under 343-4095, and it shows up under a handful of other numbers depending on who repackaged it or what catalog you're pulling from - 3434095, 921010034, 6814010225, same part.
These run on trailer axles and straight truck applications where the hub uses a similar bolt pattern and cap diameter. Doesn't matter if it's a Fruehauf, Great Dane, or Wabash trailer underneath - what matters is the cap size and how it seats on your hub, not the trailer brand.
Why These Numbers Cross - and What to Check First
3434095 and 343-4095 are just formatting differences - dash or no dash, same part. 921010034 and 6814010225 are alternate catalog numbers, likely from different distributors or a supersession Stemco ran at some point. The cross-reference numbers listed (F100000000, MST404046) point to the same physical cap from other suppliers repackaging Stemco's design.
Where guys get burned on hub caps: outside diameter and how the cap retains - snap-on lip versus a bolt-on flange with a gasket. Two caps can look close in a picture and be off by a few millimeters where it actually seats. If your hub uses a vented cap (oil bath axles) versus a solid grease cap, those are not interchangeable even if the outside size matches.
Surest way to confirm - pull the old cap off, read whatever number's stamped or cast into it, and match that against this list. If it's rusted illegible, measure across the cap's OD and check if there's a fill plug or window for oil level. That'll tell you if you need a vented style or solid.
Ordering From Us
We keep this one in stock at the Tacoma counter - $19.99, and if you're local you can grab it same day instead of waiting on shipping. We also ship these out nationwide if you're not near us, they're small enough to go out cheap.
Aftermarket part, comes with our 6+ month warranty. If it doesn't seat right or doesn't match your old cap's mounting style, call us before you install it - easier to sort out over the phone than after it's been through 500 miles of grease.
343-4095 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 343-4095. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Stemco | Stemco 343-4095, STM3434095 |
| Cross-Reference | F100000000, MST404046 |
Frequently asked questions
Does 343-4095 fit my trailer?
Depends on your hub, not your trailer brand. Pull the old cap, check the number stamped on it or measure the outside diameter and mounting style - snap-on vs bolt-on, solid vs vented for oil bath hubs. If that matches, you're good. When in doubt, give us the number off the old part and we'll confirm.
Is this the same as the Stemco 343-4095 cap?
Yes - this listing is built around that Stemco number, it's the same physical part. The other numbers we list (921010034, 6814010225, etc.) are alternate catalog references for the identical cap, not a different design.
My old cap has a little window or plug in it for checking oil - will this one work?
Only if this cap has the same feature. Solid grease caps and vented oil-bath caps aren't interchangeable even when the outside diameter is identical. Check your old cap before ordering - if it's got a sight glass or fill plug, you need that same style here.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.