RAM-B-139-G4U Flat Surface Mount for Garmin GPSMAP 620 & 640 Series

The RAM-B-139-G4U is a flat surface marine grade aluminum mount that has a 2.5 inch diameter flat surface base with pre-drilled holes, standard arm and adapter plate for the following Garmin devices:

Garmin GPSMAP 620

Garmin GPSMAP 640

NOTE: As the manufacturer adds new units/models to the above series this cradle may fit additional models not listed above. Click here for the most current model information RAM-B-347-G4U. Please call 224-578-9162 or complete the product inquiry form by clicking here.

RAM-B-139-G4U shown above.

RAM-B-139-G4U Includes the Following:

Warranty: Manufacturer's, RAM Mounts (National Products Inc.), Limited Life Time Warranty.
Color/Material: Black power coated marine grade aluminum. Chrome is available.
Socket Ball Size: B-Ball Size = 1.0 inch sized ball. 5 lb Max. Weight.
Base: RAM-B-202U 2.5 inch diameter black powder coated marine grade aluminum base with pre-drilled holes and 1 inch diameter rubber ball. The pre-drilled holes accommodate the AMPS hole pattern. Mounting hardware for the base is NOT INCLUDED.
Arm: RAM-B-201U standard length arm for 1 inch balls. The arm measures 2.875 inches between socket centers (3.6875 inches in overall length). A plastic twist knob allows you to articulate the arm in any direction.
Adapter Plate: RAM-B-347-G4U adapter plate connects to a 1 inch diameter rubber ball. The plate includes screws and nuts to attach the electronic device indicated above.

RAM-B-201U Detailed Description: Black powder coated marine grade aluminum arm allows a 1 inch diameter ball accessory to be connected at either end. A tightening knob on the side of the arm enables the sockets to clamp firmly to the attached accessories. The arm allows for easy adjustment by loosening the side knob, a single spring inside the arm opens the sockets, allowing the arm to pivot on the attached accessory. This enables the arm and accessories to be positioned at various angles allowing the ultimate in position flexibility. Loosen the knob completely and the arm will disconnect from the accessories.

Below are popular OPTIONAL accessories that can be used with the RAM-B-139 series.

Cradle/Holders/Aqua Box Options: Select a holder for Apple, cell phones, GPS systems and electronic devices by clicking here.

RAM-B-202U Options: The RAP-339U shown below is a triple magnetic base that the RAM-B-202U can attach to. This allows the RAM-B-138 to be quickly removed when not used. The magnets are extremely strong.

RAP-339U above.

RAM-B-201U Options: The RAM-KNOB3LU shown below is a keyed lock and replaces the plasic twist knob found on the RAM-B-201 series arm.

Waterproof Aqua Boxes: Consider a WATERPROOF AQUA BOX holder for foul weather conditions. The soft flex lens allows the screen of electronic devices (i.e. GPS, iPhone, etc.) to remain operational while being protected from the elements. The electronic device sits inside the aqua box using foam inserts and does not require a RAM Mounts holder/cradle to secure the device inside the aqua box. A knockout in the aqua box allows cables to be routed. LOCK NOT INCLUDED.

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