Product Description
403-NMO-UHF – Heavy-Duty Stainless Steel Antenna Mounting Bracket
The 403-NMO-UHF is a heavy-duty 90-degree L-shaped stainless steel antenna mounting bracket designed for securely mounting antennas, RF connectors, and mobile communication equipment to vehicles, walls, panels, poles, and other mounting surfaces.
Constructed from 0.100-inch-thick stainless steel, the 403-NMO-UHF provides excellent strength, rigidity, and corrosion resistance for indoor and outdoor installations. The bracket features a 5/8-inch mounting hole and a 16 mm (0.63-inch) connector opening, providing compatibility with a variety of antenna mounting configurations, including SO-239 bulkhead connectors and NMO mounts.
Its compact L-shaped design positions an antenna away from the mounting surface while providing multiple mounting holes for secure attachment.
Key Features
- NMO to UHF Female (SO-239) Connector
- Heavy-Duty Stainless Steel Construction – Durable 0.100-inch-thick stainless steel provides excellent strength and resistance to corrosion.
- 90-Degree L-Bracket Design – Positions antennas vertically away from walls, vehicle surfaces, equipment panels, and other mounting locations.
- 5/8" Mounting Hole – Designed for compatible antenna mounts and RF bulkhead connector installations.
- 16 mm (0.63") Connector Opening – Allows installation of compatible SO-239 bulkhead connectors and NMO mounts.
- Multiple Mounting Holes – Provides flexible attachment options and secure fastening to the mounting surface.
- Compact Heavy-Duty Design – Suitable for vehicle, industrial, commercial, IoT, and communications applications.
- Weather Resistant – Stainless steel construction is well suited for outdoor antenna installations.
- Helium Network Compatible – Commonly used as an antenna mounting solution for Helium/IoT network installations.
Specifications
| Part Number | 403-NMO-UHF |
| Connector | NMO to UHF Female (SO-239) |
| Product Type | 90° L-Shaped Antenna Mounting Bracket |
| Material | Stainless Steel |
| Finish | Passivated Stainless Steel |
| Bracket Thickness | 0.100" (1/10") |
| Mounting Hole | 5/8" |
| Connector Opening | 16 mm (0.63") |
| Overall Dimensions | 3-15/16" × 2-5/16" × 2-5/16" |
| Horizontal Hole Spacing | 30 mm (~1.18") center-to-center |
| Vertical Hole Spacing | 50 mm (~1.97") center-to-center |
| Mounting Hole Diameter | 0.5 cm |
| Bracket Angle | 90° |
Applications
The 403-NMO-UHF can be used for a wide range of antenna and RF mounting applications:
- CB, Ham, GMRS & Mobile Radio Antennas
- NMO Antenna Mounts
- SO-239 Bulkhead Connector Installation
- Helium / IoT Network Antennas
- Wi-Fi & Wireless Networking Equipment
- Cellular Antennas
- Commercial & Fleet Vehicles
- Trucks, Toolboxes & Equipment Panels
- Agricultural & Industrial Equipment
- Walls, Buildings & Exterior Panels
- Pole and Mast Mounting
- RF Communications Equipment
Vehicle Mounting
The L-shaped configuration makes the 403-NMO-UHF useful for mounting antennas on vehicle fenders, trunk edges, hood lips, toolboxes, spare-tire racks, and other structural surfaces where drilling a large primary mounting hole may not be desirable.
Wall & Equipment Mounting
The bracket can also be secured to walls, exterior panels, equipment cabinets, enclosures, and other structures to provide a stable mounting point for antennas and RF hardware.
Pole & Mast Applications
When used with user provided fastening hardware, the 403-NMO-UHF can be adapted for mounting compatible antennas to vertical or horizontal poles and masts.
American Radio Supply 403-NMO-UHF — a rugged, compact stainless-steel mounting solution for antenna, RF, NMO, and communications installations.
Other Details
See warranty details aboveProduct Videos
Custom Field
Product Reviews
6 Reviews Hide Reviews Show Reviews
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Five Stars
Makes for an array of antenna/connectors which is intuitive and versatile in applications.
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Five Stars
Makes for an array of antenna/connectors which is intuitive and versatile in applications.
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Just Right!
Purchased for possible antenna mounting on 2013 Santa Fe with panoramic view rooftop. Fits topside in gap between hatchback door and backside of roof. Just the right dimensions.
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★★★★
For my installation, I needed to drill holes closer together to facilitate a perfect fit.
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Highly Recommended
This is a very nicely made product. Bracket is thick and sturdy. NMO connector is very nice too with (gold plated brass alloy) contact points. Put together with locking type hardware to stay tight and secure. Highly recommended.
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Nice Heavy-Duty Bracket
Stainless steel heavy-duty bracket, These are great for mounting antennas on a trailer or other outside surfaces on a vehicle.
