RAM® Ball Adapter with 1/4"-20 Threaded Stud for Action Cameras - C Size

Part#: RAP-366U
UPC: 793442923647

Compatibility

Cameras

that contain 1/4"-20 Female Threaded Hole
$17.99

Overview

The RAP-366U, universal camera and camcorder base, consists of a 1.5" diameter rubber ball, connected to a round plate with 1/4"-20 camera thread. The round plate provides extra support and stability for cameras that rest on top of it. The male 1/4"-20 threaded steel stud will connect to any standard female thread found on camcorders and digital cameras.

ball size:

C Size (1.5")

weight capacity:

Standard Use: 4 lbs
Heavy-Duty Use: 3 lbs

materials:

High strength composite

packaging type:

Poly Bag

Weight:

0.14 lb

Return Policy:

All products purchased from RAM® can be returned within 30 days with no restocking fee (return shipping not provided). See full return policy here.

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Documents

Knowledge Base: Ball Sizes

QUESTIONS & ANSWERS

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  • What is the diameter of the base?

    The diameter of this base is 1.25"
RAM® Ball Adapter with 1/4"-20 Threaded Stud for Action Cameras - C Size
$17.99

Size Guide

Ball sizes
  • A Size 0.56" ball
  • B Size 1" ball
  • C Size — this product 1.5" ball
  • D Size 2.25" ball
  • E Size 3.38" ball

Every RAM® mount is built around a rubber ball and socket system. The ball size sets how much weight the mount can carry. Match it to your device for smooth adjustment with a rock-solid hold.

RAM Mounts ball size specifications and typical uses
Size Ball Diameter Max Load* Best For
A0.56" (14.3 mm)0.5 lbAction cameras and other ultra-light devices
B1" (25.4 mm)2 lbsPhones, GPS units, and small tablets — the most common size
C — this product1.5" (38.1 mm)4 lbsLarge tablets, fish finders, and rougher rides
D2.25" (57.2 mm)6 lbsRugged tablets, laptops, and heavy equipment
E3.38" (85.9 mm)15 lbsLarge displays and demanding aviation or industrial use

*Approximate capacity for a standard ball with a mid-length arm. Shorter arms and steel-reinforced posts increase real-world capacity.

Reading part numbers

The letter after RAM tells you the ball size: RAM-B-166 uses a 1" B ball, while RAM-D-201 uses a 2.25" D ball. C size parts are the exception and carry no letter, so RAM-201U is a C size arm.

Add-on & Accessories

C Size Double Socket Arms
See All
RAM® Double Socket Arm - C Size Medium RAM-201U $31.49
RAM® Double Socket Arm - C Size Long RAM-201U-D $57.49
RAM® Double Socket Arm - C Size Short RAM-201U-B $29.49
RAM® Double Socket Swivel & Ratchet Arm - C Size RAP-200-2U $40.99
RAM® Composite Double Socket Arm - C Size Short RAP-201U-B $17.49
RAM® Composite Double Socket Arm - C Size Medium RAP-201U $22.49
RAM® Double Socket Swivel Arm - C Size RAP-200-12U $31.99
RAM® Double Socket Arm with Metal Knob - C Size Long RAM-201MU-D $75.99
RAM® Double Socket Arm with Metal Knob - C Size Medium RAM-201MU $49.49
RAM® Flex-Arm™ with 18" Aluminum Rod and Two Single Socket Arms RAM-316-2U $65.49
RAM® Double Socket Arm with Metal Knob - C Size Short RAM-201MU-B $41.99
RAM® Double Socket Arm with RAM® Pin-Lock™ Security Knob - C Size Medium RAM-201-SU $38.49
RAM® Double Socket Arm with RAM® Pin-Lock™ 5-Pin Security Knob - C Size RAM-201-BS-KEY5U $36.99
RAM® Double Socket Arm with RAM® Pin-Lock™ Security Knob - C Size Short RAM-201-BSU $36.99
RAM® Double Socket Arm with RAM® Pin-Lock™ 5-Pin Security Knob RAM-201-S-KEY5U $39.49
RAM® Double Socket Arm with Steel Key Lock Knob - C Size Medium RAM-201LSU $62.99
RAM® Double Socket Arm with Brass Key Lock Knob - C Size Short RAM-201U-BL $65.49
RAM® Composite Double Socket Arm with 5-Pin RAM® Pin-Lock™ Security Knob RAP-201-S-KEY5U $30.49
RAM® Double Socket Arm with Brass Key Lock Knob - C Size Medium RAM-201LU $69.99
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C Size 1.5" Ball Bases
See All
RAM® Round Plate with Ball - C Size RAM-202U $19.49
RAM® Track Ball™ Base with T-Bolt Attachment - C Size RAP-354U-TRA1 $19.99
RAM® Diamond Ball Base - C Size RAM-238U $16.49
RAM® 75x75mm VESA Plate with Ball - C Size RAM-2461U $25.49
RAM® Tough-Claw™ Large Clamp Ball Base RAP-401U $72.99
RAM® Tough-Claw™ Medium Clamp Ball Base RAP-404U $53.99
RAM® Double U-Bolt Ball Base for 1" - 1.25" Rails - C Size RAM-235U $33.49
RAM® Tough-Claw™ Small Clamp Ball Base RAP-400U $46.99
RAM® Tough-Ball™ with M10-1.5 x 25mm Threaded Stud - C Size RAP-379U-M101525 $15.99
RAM® 100x100mm VESA Plate with Ball - C Size RAM-246U $30.49
RAM® Ball Adapter with AMPS Plate - C Size RAM-347U $16.49
RAM® Twist-Lock™ Triple Suction Cup Ball Base - C Size RAP-365-224-1U $71.49
RAM® Tough-Ball™ with M8-1.25 x 10mm Threaded Stud RAP-379U-M812510 $15.49
RAM® Torque™ Medium Rail Base - C Size RAM-408-75-1U $32.49
RAM® Ball Base with 1.5" x 2" 4-Hole Pattern - C Size RAM-202U-225 $20.49
RAM® Double U-Bolt Ball Base for 1.25" - 1.5" Rails - C Size RAM-235-1U $30.99
RAM® Tough-Ball™ with 1/4"-20 x .25" Threaded Stud - C Size RAP-379U-252025 $14.99
RAM® Composite Round Plate with Ball - C Size RAP-202U $13.99
RAM® ATV/Side By Side Rail Ball Base RAM-231Z-2U $32.49
RAM® Double U-Bolt Ball Base for .75" - 1" Rails RAM-235-2U $35.49
RAM® Torque™ Large Rail Base - C Size RAM-408-112-15U $32.49
RAM® Handlebar U-Bolt Base for Rails 0.5" to 1.25" in Diameter - C Size RAM-231ZU $23.99
RAM® Strap Hose Clamp Base RAM-108BU $25.49
RAM® PVC Pipe Socket with Ball - C Size RAP-294U $15.49
RAM® Ball Base with 1.5" x 3.5" 4-Hole Pattern - C Size RAM-202U-24 $28.49
RAM® Tough-Ball™ with 1/4"-20 x .50" Threaded Stud - C Size RAP-379U-252050 $14.99
RAM® Tough-Ball™ with 5/16"-18 X .75" Threaded Stud RAP-379U-311875 $13.99
RAM® Twist-Lock™ Triple Suction Cup Base with Ball RAM-224-3U $69.49
RAM® Ball Adapter with Round Plate and 3/8"-16 Threaded Hole RAM-202CNSU $21.99
RAM® Tough-Mag™ 88MM Diameter Magnetic Ball Base - C Size RAM-238-MAG88U $83.49
RAM® Aluminum Track Ball Base with T-Bolt Attachment - C Size RAM-463-TRA1U $26.49
RAM® Drill-Down Dashboard Ball Base with Backing Plate - C Size RAM-202-225-2U $29.99
RAM® Ball Base with 1.5" 2-Hole Pattern - C Size RAM-202U-12 $18.49
RAM® Square Post Clamp Base for Posts up to 4" Wide - C Size RAM-247U-4 $48.49
RAM® Round Plate with Ball & Steel Reinforced Bolt RAM-202U-IN1 $25.49
RAM® Square Post Clamp Base for Posts up to 2.5" Wide - C Size RAM-247U-25 $26.49
RAM® Tough-Ball™ with 3/8"-16 X .375" Threaded Stud - C Size RAP-379U-371637 $16.49
RAM® 75x75mm VESA Plate with Ball and Steel Reinforced Post RAM-2461U-IN1 $33.49
RAM® Square Post Clamp Base for Posts up to 3" Wide - C Size RAM-247U-3 $52.49
RAM® Ball Adapter for John Deere RAM-270U $41.99
RAM® Ball Adapter with 1/4" - 20" Threaded Hole and Hex Post - C Size RAM-337U $18.99
RAM® Rail Clamp Ball Base for 1.25" - 1.875" Rails - C Size RAM-271U-12 $52.99
RAM® Ball Adapter with 1/4"-20 Threaded Post - C Size RAM-237U $15.99
RAM® Ball Base with 1" x 2.5" 4-Hole Pattern - C Size RAM-202U-153 $18.99
RAM® Rail Clamp Ball Base for 2" - 2.5" Rails - C Size RAM-271U-2 $83.99
RAM® Ball Base with 1.5" x 1.5" 4-Hole Pattern - C Size RAM-202U-22 $26.49
RAM® Universal Composite Marine Electronic Ball RAP-111BU $21.49
RAM® 1/2" NPT Female Threaded Hole with Ball RAM-218-1U $23.99
RAM® Ball Base with 2" x 2" 4-Hole Pattern - C Size RAM-202U-2525 $21.99
RAM® Tough-Ball™ with 1/4"-20 x .625" Threaded Stud - C Size RAP-379U-252062 $16.49
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