Product Description
ARS-AM-403 – Heavy-Duty Stainless Steel Antenna Mounting Bracket – 5/8" Mounting Hole
The AM-403 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 ARS-AM-403 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
- 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
| Brand | American Radio Supply |
| Part Number | ARS-AM-403 |
| 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 ARS-AM-403 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 ARS-AM-403 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 ARS-AM-403 can be adapted for mounting compatible antennas to vertical or horizontal poles and masts.
American Radio Supply ARS-AM-403 — 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
5 Reviews Hide Reviews Show Reviews
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Nice Mount
Nice mount. Works what more could I say.
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★★★★★
No problem
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Superb
Thank you. The antenna mount is superb !!!!!!!
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Exactly What I Wanted
This is a sturdy bracket which is exactly what I wanted. It arrived quickly and does the job.
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Antenna Mount
High quality material. Would have rated a 5-star if it came with the u-bolts. Easy to come by at the hardware store...
