World-Class Mounting Systems

Size Guide

Ball Sizes
Arm Sizes
X
The unique double ball and socket design allows you to adjust your mount to the perfect viewing or operating angle, all with the turn of a single knob. This modular design can be configured with a variety of interchangeable components to fit your specific mounting needs.
B Size
Holds 2 lbs / 0.91 KG
1" Ball
Phones, Action Cameras, Light Duty Tablets
C Size
Holds 4 lbs / 1.81 KG
1.5" Ball
Fishfinders, Heavy Duty Tablets
D Size
Holds 6 lbs / 2.72 KG
2.25" Ball
Monitors, Large Fishfinders
E Size
Holds 15 lbs / 6.8 KG
3.38" Ball
Heavy Monitors
Ball Sizes Short Arm Medium Arm Long Arm
B Size Overall Length 2.42" / 6.1468cm 3.73" / 9.47cm 6.00" / 15.24cm
Socket-to-Socket Length 1.75" / 4.45cm 3.00" / 7.62cm 5.31" / 13.49cm
C Size Overall Length 3.56" / 9.04cm 5.69" / 14.45cm 9.13" / 23.19cm
Socket-to-Socket Length 2.50" / 6.35cm 4.66" / 11.84cm 8.00" / 20.32cm
D Size Overall Length 5.10" / 12.95cm 8.44" / 21.44 12.98" / 32.97
Socket-to-Socket Length 3.60" / 9.14cm 6.88" / 17.48cm 11.41" / 28.98cm
E Size Overall Length 7.31" / 18.57cm 12.63" / 32.08cm N/A
Socket-to-Socket Length 4.98" / 12.65cm 9.88" / 25.10cm N/A

RAM® Double Ball Drill-Down Mount with Diamond Plate - Medium

SKU Copied
SKU: RAM-B-138U
UPC Copied
UPC: 793442138003
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RAM® Double Ball Drill-Down Mount with Diamond Plate - Medium
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SKU: RAM-B-138U
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| UPC: 793442138003

B SIZE
MED ARM
Size Guide
Overview
The RAM-B-138U consists of a medium length B size 2.54cm (1") double socket arm, one 6.35cm (2.5") diameter round ball base, and one diamond ball base (both bases feature the universal AMPS hole pattern). The ball and socket system provides shock and vibration damping, and allows for near-infinite adjustability to achieve an ideal viewing and operating angle of your device.

Features
  • Drill-down mounting solution; diamond plate features 2-hole AMPS hole pattern for attachment to compatible device holders
  • Includes round ball base, diamond ball base, and B size medium length double socket arm; ball and socket technology allows for near-infinite adjustability
  • Made of Powder-coated, marine-grade aluminum for durability and reliability in the most demanding marine environments
  • Backed by a lifetime warranty

Information

Information

Product Dimensions

Overall Height: 12.70cm (5")

Socket To Socket Length

7.62cm (3")

Hole Pattern

4-Hole AMPS: 3.00 cm (1.181") X 3.80 cm (1.496")
3-Hole 120-Degree: 4.60cm (1.812") Diameter

Plate Size

Round Plate: 6.35cm (2.5") Diameter
Diamond Plate: 6.17 cm (2.43") X 3.33 cm (1.31")

Ball Size

B Size (1")

Weight Capacity

Standard Use: 0.91 kg (2 lbs)
Heavy-Duty Use: 0.45 kg (1 lbs)

Materials

Marine-grade aluminum

Packaging Type

Poly Bag

Weight

0.24 kg (0.52 lbs)

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Components

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RAM-B-201U
RAM® Double Socket Arm - B Size Medium
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RAM-B-202U
RAM® Round Plate with Ball - B Size
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RAM-B-238U
RAM® Diamond Ball Base - B Size


Complete Your Solution

Locking Knobs for B Size Socket Arms

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RAM-KNOB3LSU
RAM® Key Lock Knob with Steel Insert for B Size Socket Arms
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RAP-S-KNOB3-7U
RAM® Pin-Lock Security Knob with 7-Pin Pattern for B Size Socket Arms
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RAM® Pin-Lock™ Security Knob for B Size Socket Arms

Diamond Plate Accessories

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RAP-462NPT
RAM® Vibe-Safe with NPT Adapter for 2-Hole Holders
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RAM® Roto-View Adapter Plate
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RAP-326U
RAM® EZY-Mount Quick Release Adapter Kit

Accessories for AMPS Pattern Base Components

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RAM-202-225B-2U
RAM® Backing Plate Adapter
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RAM-HOL-ROTO1U
RAM® Roto-View Adapter Plate
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RAP-400-202U
RAM® Tough-Claw Trolling Motor Stabilizer - C Size Medium

RAM® Add-A-Ball Accessory Ball for B Size Socket Arms

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RAM Mounts
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RAM-B-273U
RAM® Add-A-Ball Accessory Ball for B Size Socket Arms
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