Description
N275F Mast Mount – AC Antennas Universal Marine Antenna Mount
Heavy-duty mast, rail and wall mounting solution for marine antenna installations.
The N275F Mast Mount from AC Antennas is a versatile marine antenna bracket designed for professional installations where strength, corrosion resistance and compatibility matter. It provides a secure mounting point for antennas using a standard 1″ x 14 TPI external thread.
N275F Mast Mount Key Features
- Universal mounting design: suitable for mast, rail, pole and wall installations
- Marine-grade construction: anodised and lacquered aluminium body
- Corrosion-resistant hardware: supplied with SS316 stainless steel U-bolts
- Standard thread size: 1″ x 14 TPI female thread
- Side mounting range: suitable for Ø20–58mm poles or rails
- Top mounting range: suitable for Ø40–46mm support pipes
- System compatibility: suitable for many AC Antennas VHF, AIS, UHF and cellular antennas
Built for Marine Communication Installations
The N275F is designed for installations where a reliable antenna mounting point is required on a mast, rail, pole or wall structure. It is suitable for yachts, workboats, commercial vessels, harbour systems and land-based marine communication installations.
The bracket arrangement allows flexible positioning where antenna height, cable routing and available mounting space need to be balanced carefully. This makes it a practical choice for VHF, AIS, UHF and cellular antenna systems where a strong and stable mounting base is required.
Technical Specifications
| Product | N275F Mast Mount |
|---|---|
| Part Number | 900018-B |
| Manufacturer | AC Antennas |
| Product Group | Marine Antenna Mount |
| Material | Aluminium |
| Finish | Anodised, lacquered |
| Colour | Black |
| Thread | 1″ x 14 TPI female |
| Side Mounting Diameter | Ø20–58mm |
| Top Mounting Pipe Diameter | Ø40–46mm |
| Mounting Hardware | SS316 U-bolts included |
| Weight | 0.55kg |
| Size | 0.07 x 0.09 x 0.12m |
Antenna Compatibility
The N275F is suitable for antennas with a standard 1″ x 14 TPI external thread. This includes many AC Antennas marine VHF, AIS, UHF and cellular antenna models.
For help checking thread compatibility, see our Marine Antenna Thread Sizes Guide and Marine Antenna Mount Compatibility Guide.
Installation Guidance
For best performance, install the antenna as high and clear as practical. Avoid mounting directly behind large metal structures, radar scanners or other antennas where possible. Correct mounting height, antenna separation and cable routing can make a noticeable difference to real-world VHF, AIS and UHF performance.
For further installation guidance, read our Marine VHF Antenna Mounting Guide and Marine Antennas Guide.
Need Help Matching a Mount?
Marine antenna mounting can be confusing because thread sizes, ferrules, adaptors and antenna bases are not always the same. If you are replacing an existing mount or matching the N275F to an AC Antennas product, F&C Marine can help confirm the correct fitting before purchase.
Frequently Asked Questions
What thread size does the N275F use?
The N275F uses a standard 1″ x 14 TPI female thread, suitable for antennas with a compatible 1″ x 14 TPI external mounting thread.
Can the N275F be used as a rail mount?
Yes. The N275F can be used for mast, rail, pole and wall mounting depending on the installation layout and mounting diameter.
What pole size does the N275F fit?
The N275F supports side mounting on Ø20–58mm poles or rails. For top mounting, it is suitable for support pipes from Ø40–46mm.
Is the N275F suitable for AIS and VHF antennas?
Yes, provided the antenna uses a compatible 1″ x 14 TPI external thread. It is commonly used with marine VHF, AIS, UHF and cellular antenna systems.
Downloads
- N275F Mast Mount Datasheet
- AC Antennas Marine Catalogue
Related Installation Guides
- Marine Antenna Thread Sizes Guide
- Marine Antenna Mount Compatibility Guide
- Marine VHF Antenna Mounting Guide
- Marine Antennas Explained
More AC Antennas Products
Browse the full range of AC Antennas marine communication products, including VHF antennas, AIS antennas, UHF antennas, GPS antennas and antenna mounting systems.
Manufacturer Resources
Why Buy From F&C Marine?
F&C Marine supplies AC Antennas products for professional marine communication installations, including VHF, AIS, UHF, GPS and cellular antenna systems. We support both leisure and commercial vessel installations with practical product knowledge and compatibility guidance.
For N275F Mast Mount supply or replacement enquiries, confirm the exact model or part reference against the equipment already installed.
Related F&C Marine guide
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