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This is a genuine Omega screw for the barrel bridge of Caliber 8500 (and 8501) Co‑Axial automatic movements, part number 7228500A3534, Swiss‑made. This screw securely fastens the barrel bridge to the mainplate, ensuring precise positioning and stable operation of the barrel within the movement. This original factory part is the ideal choice for watchmakers to replace worn, stripped, or lost original screws during service or repair.
Genuine Omega Part – Swiss factory‑original for Caliber 8500/8501, not a copy.
Barrel Bridge Securing Core – Locks the barrel bridge to the mainplate, ensuring correct barrel endshake and gear meshing.
Precision Machined – Made of high‑quality hardened steel with accurate thread profile for secure fastening.
Essential for Service – Replaces stripped, damaged, or lost barrel bridge screws to restore movement integrity.
Compatible Movement – Designed for Omega Caliber 8500, 8501, and other platform‑based calibers.
| Parameter | Details |
|---|---|
| Part Name | Barrel Bridge Screw |
| Part Number | Omega 7228500A3534 |
| Compatible Movements | Omega Caliber 8500, 8501 (and other 8500 series platform calibers) |
| Function | Secures the barrel bridge to the mainplate |
| Material | High‑quality hardened steel |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Omega Caliber 8500, 8501 Co‑Axial automatic movements (found in Seamaster, De Ville, Constellation collections).
Replacing worn, stripped, or damaged barrel bridge screws during movement service.
Repairing barrel bridge misalignment, poor gear meshing, or unusual noises caused by loose screws.
1. Is this a genuine Omega barrel bridge screw?
Yes. It is a Swiss factory‑original part (7228500A3534) for Caliber 8500/8501, not a copy.
2. Does this screw fit other 8500 series variants (e.g., 8500G, 8501)?
Yes. All 8500 series calibers share the same barrel bridge construction; this screw is fully compatible.
3. What are the symptoms of a damaged barrel bridge screw?
Typical symptoms: a loose barrel bridge can cause poor gear meshing, leading to unusual noises, low amplitude, or even stoppage.
4. What should I pay attention to during installation?
Use a properly fitting precision screwdriver and apply even, moderate torque. A torque‑controlled screwdriver is recommended. Professional installation is strongly advised.
5. Should I use threadlocker?
Usually not. The original screw has sufficient self‑locking properties. If it feels loose after multiple reuses, a tiny amount of low‑strength threadlocker (e.g., Loctite 222) may be applied.
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