4 each plastic wheel collars with set screws and wrench for 1/16 and 1/5 mm axles. Lighten up with Du-Bro Micro Wheel Collars. Designed for electric flyers with .047" (11.938 mm) to .062" (15.748 mm) axles and use set screws for a secure fit. These Micro Wheel Collars are 50% LIGHTER than standard 1/16" brass wheel collars. Each collar weighs 0.42 grams. Each pack includes (4) collars with set screws and a .050" allen wrench. Made in USA

The DU-BRO Nickel Plated Shaft / Wheel Collars are precision-machined, high-quality brass collars designed to provide a secure, reliable hold on wire landing gear, axle shafts, control systems, and many other RC applications. Each collar is nickel plated for long-lasting durability, corrosion resistance, and a clean, professional appearance on your aircraft, car, boat, or robotics project.

DU-BRO designs these collars with enough material around the threads to prevent stripping, even after repeated tightening or adjustments. This makes them extremely dependable for landing gear retention, wheel positioning, pushrod stops, and hundreds of custom uses across the hobby and engineering world. Each collar includes a matching set screw, and most sizes also include an Allen wrench for quick and easy installation. (Wrench not included with sizes #243 & #244.)

These collars are available in a wide range of inside diameters (1/16" to 1/4") so you can choose the perfect fit for your landing gear wire or axle. The consistent machining ensures smooth operation, tight clamping force, and vibration-resistant performance.

Size Variant is I.D. of Collars

Dimensions (O.D. & Width) 

• 1/16"- O.D. .205" Width .190"
• 3/32"- O.D. .255" Width .186"
• 1/8"- O.D. .280" Width .190"
• 5/32"- O.D. .348" Width .222"
• 3/16"- O.D. .376" Width .219"
• 7/32"- O.D. .488" Width .252"
• 1/4"- O.D. .490" Width .252" 

Allen Wrench Sizes: 

• 1/16" (1.5 mm) - 3/32" (2.3 mm) - 1/8" (3 mm) = .050" Wrench
• 5/32" (4 mm) - 3/16" (4.7 mm) = 1/16" Wrench
• 7/32" (5.5 mm) - 1/4" (6.3 mm) = 5/64" Wrench

• 1/16" (1.5 mm) - 1 gram / each
• 3/23" (2.3 mm) - 1 gram / each
• 1/8" (3 mm) - 1.25 grams / each
• 5/32" (4 mm) - 2.25grams / each
• 3/16" (4.7 mm) - 2.75grams / each
• 7/32" (5.5 mm) - 5grams / each
• 1/4" (6.3 mm) - 4.5grams / each

Made in USA

Common Uses:

• RC airplane landing gear
• Wheel axles and positioning
• Robotics and automation projects
• Prototyping and R&D applications
• Engineering, design, and aeronautics
• Motion picture rigging and industrial setups

With DU-BRO's precision machining and Made-in-USA quality, these nickel-plated shaft collars deliver dependable performance in both hobby and professional environments.

Allen Wrench Size: 5/32" (4 mm) - 3/16" (4.7 mm) = 1/16" Wrench

Weight: 5/32" (4 mm) - 2.25grams / each

Made in USA

Choose from 4-Pack DUB140 or 12-Pack Bulk DUB598 Quantity Options 

Allen Wrench Size: 5/32" (4 mm) - 3/16" (4.7 mm) = 1/16"

Wrench Weight: 3/16" (4.7 mm) - 2.75grams / each

Made in USA

Photo #2 shows range of Du-Bro Collars for example.

These high quality DU-BRO shaft collars are also used in many other industries such as robotics, aeronautics, industrial, motion picture, design, R&D (research and development), aviation, commercial and many more.

Choose from 4-Pack DUB141 or 12-Pack Bulk DUB599 Quantity Options

Shave some weight with precision aluminum wheel collars. For 5/32"-4mm axles. OD: 8.9mm (.350"), Width: 4.5mm (.180"). 4 Per package.

Shave some weight with precision aluminum wheel collars. For 3/16"-5mm axles. OD: 10.0mm (.390"), Width: 5.1mm (.200"). 4 Per package.

Shave some weight with precision aluminum wheel collars. For 5/16"-8mm axles. OD: 15.7mm (.620"), Width: 7.0mm (.278"). 4 Per package.

4 Each plated brass wheel collars with set screws for 3/16" / 5mm axles. Set screw size is 3mm, 1.5mm wrench required.