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 - Short

SKU Copied
SKU: RAM-B-138U-A
UPC Copied
UPC: 793442903298
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02 26 240823ram B 138u A2jpg
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RAM® Double Ball Drill-Down Mount with Diamond Plate - Short
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SKU: RAM-B-138U-A
Copy UPC
| UPC: 793442903298

Overview
The RAM-B-138U-A consists of a 6.35cm (2.5") diameter round base that contains the universal AMPs hole pattern, SHORT double socket arm and diamond base adapter. The mount is designed with a 2.54cm (1") diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. The hole pattern found on the diamond base adapter will connect to most RAM cradles. The included RAM’s patented design dampens shock and vibration, helping to extend the life 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 short 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: 9.53cm (3.75")

Socket To Socket Length

4.45cm (1.75")

Hole Pattern

Diamond Plate: 2-Hole AMPS: 4.86cm (1.912")
Round Plate: 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

0.19 kg (0.42 lbs)

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Components

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RAM Mounts
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RAM-B-201U-A
RAM® Double Socket Arm - B Size Short
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RAM Mounts
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RAM-B-202U
RAM® Round Plate with Ball - B Size
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RAM Mounts
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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 Mounts
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RAM-KNOB3LSU
RAM® Key Lock Knob with Steel Insert for B Size Socket Arms
01 29 232210rap S Knob3 7u1jpg
RAM Mounts
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RAP-S-KNOB3-7U
RAM® Pin-Lock Security Knob with 7-Pin Pattern for B Size Socket Arms
07 19 230753rap S Knob3u1jpg
RAM Mounts
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RAP-S-KNOB3U
RAM® Pin-Lock Security Knob for B Size Socket Arms

Diamond Plate Accessories

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RAM Mounts
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RAP-462NPT
RAM® Vibe-Safe™ with NPT Adapter for 2-Hole Holders
01 29 230755ram Hol Roto1u1jpg
RAM Mounts
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RAM-HOL-ROTO1U
RAM® Roto-View Adapter Plate
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RAM Mounts
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RAP-326U
RAM® EZY-Mount™ Quick Release Adapter Kit

Accessories for AMPS Pattern Base Components

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RAM Mounts
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RAM-202-225B-2U
RAM® Backing Plate Adapter
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RAM Mounts
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RAM-HOL-ROTO1U
RAM® Roto-View Adapter Plate
01 29 232018rap 403u1jpg
RAM Mounts
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RAP-403U
RAM® Cable Manager with AMPS Hole Pattern for Electronic Mounts

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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