BACK PLATE FOR THOMSEN PUMP
SKU
TB
In stock
Only %1 left
As low as
$299.00
Back Plate for Thomsen Milk Pump — Multiple Options (Internal & External Seal)
Precision replacement back plates for Thomsen milk pumps, available for models #4, #5, #6, #8 and for both internal and external seal configurations. The correct back plate restores seal alignment, reduces leaks, and extends service life.
- Available options:
- #4 — Internal seal
- #4 — External seal
- #5 — Internal seal
- #5 — External seal
- #6 — Internal seal
- #6 — External seal
- #8 — Internal seal
- #8 — External seal
- Find your Thomsen model: Measure the outside diameter (OD) of the pump head:
- 4" OD → Model #4
- 5" OD → Model #5
- 6" OD → Model #6
- 8" OD → Model #8
- Check your seal style: Select the back plate that matches your pump’s Internal or External seal configuration.
Tip: If you’re replacing seals too, confirm your style on our Thomsen Seal Kits page.
Not sure which one you have? Compare your pump to the images above and confirm with our Thomsen Seal Kits page.
- Restores proper back-spacing and seal face alignment
- Direct-fit replacement for worn or damaged originals
- Built for dairy service: durable, corrosion-resistant, easy to install
Internal seal kits generally include: head O-ring, ceramic face, carbon face with spring, and impeller clips.
External seal kits are different—match the kit to your pump’s seal style.
- #4 Internal: 9355BO / 9355VO · External: 9222BO / 9222VO
- #5 Internal: 9356BO / 9356VO · External: 9223BO / 9223VO
- #6 Internal: 9357BO / 9357VO · External: 9224BO / 9224VO
- #8 Internal: 9359BO / 9359VO · External: 9499BO / 9499VO
For complete seal kits and diagrams, visit our Thomsen Seal Kits page.
Common interchange numbers used by OEMs and aftermarket suppliers. Verify model and seal style before ordering.
| Variant | OEM / Thomsen | Common Aftermarket / Supplier | Notes |
|---|---|---|---|
| #5 — Internal | — | 59828 | Back plate for #5 internal seal |
| #5 — External | — | 59787 | Back plate for #5 external seal |
| #8 — Internal | — | 59768 | Shown for reference; select #8 internal |
Don’t see your number? Tell us the code on your current back plate or pump head and we’ll confirm the match.
- Back plate (select model and seal style)
Seal kits and small parts sold separately.
