HySecurity MX000557, ARM RETAINER HALF, ALUMINUM
HySecurity MX000557 is an aluminum arm retainer half used in HySecurity StrongArm barrier arm assemblies. The retainer helps clamp or support the barrier arm in the correct mounting assembly so the arm remains secured during normal open and close cycles. It is a service item to consider when the original retainer is cracked, bent, missing, stripped, or no longer holds the arm properly. This is only one retainer half, so the technician should inspect the complete retainer set, arm hardware, fasteners, and arm profile before ordering. StrongArm, StrongArmPark, StrongArm M30/M50, and similar barrier-style products can use different arm assemblies and hardware, so verify the exact parts diagram.
Compatible With
- HySecurity StrongArm barrier arm assemblies where MX000557 is specified
- Select StrongArm and StrongArmPark arm-retainer service applications when the existing retainer matches
- Barrier arm repair work requiring an aluminum arm retainer half
- M30/M50 style barrier arm references only when confirmed by parts diagram
Features and Specifications
| Manufacturer | HySecurity / Nice |
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| Part Number | MX000557 |
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| Product Type | Arm retainer half |
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| Material | Aluminum |
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| Application | Barrier arm retention hardware |
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| Quantity | One retainer half unless product listing states otherwise |
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| Notes | Verify arm profile and matching retainer hardware |
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Also Known As / Related Part Numbers
- MX000557
- Arm retainer half, aluminum
- Aluminum barrier arm retainer half
- StrongArm arm retainer half
Technician Note
If an arm retainer failed because the arm was struck, inspect the arm, hub, mounting plate, bolts, and operator stop settings before replacing only the retainer.
Before Ordering Checklist
- Confirm the barrier arm model and arm profile
- Inspect the opposite retainer half and bolts
- Check for accident damage or bent mounting hardware
- Confirm quantity needed for the repair
- Verify torque and alignment after installation
Professional Advisory
Barrier arm service should be performed with the operator disabled. Long arms can drop or swing unexpectedly if hardware is loosened without support.
Important Ordering Warning
Do not assume all StrongArm retainer halves are the same. Match MX000557 to the arm and operator parts diagram.
Product Questions and Answers
What is HySecurity MX000557 used for?
HySecurity MX000557 is used as a replacement aluminum arm retainer half in select HySecurity StrongArm barrier arm assemblies. Match it to the original part number and the operator parts diagram before ordering.
How do I confirm MX000557 is the correct part?
Compare the part number on the existing component, the operator model, the control system generation, and the physical or electrical specifications shown in the parts diagram.
Does MX000557 include both halves of the retainer?
The part name identifies this as an arm retainer half. Verify quantity and included hardware before ordering.
When should the retainer be replaced?
Replace it when it is cracked, stripped, bent, missing, or no longer secures the barrier arm correctly.
Should a technician install MX000557?
A qualified gate technician is recommended whenever the repair involves electrical wiring, stored energy, moving gate hardware, hydraulic components, or safety-related operation.
