How tall is the 8mm flange?

the flange base is 3mm high and the total height is 13mm. diameter of the flange is 32mm and the diameter of the post is 16mm.

Are their any with thread for the 4 little holes?

No, they are not threaded. I actually drilled out the set ecrew holes and tapped them for 1/4" set screws. Much more secure. Ypu coule tap the 4 holes for scres if you want to.

What is the diameter or radius of the four mounting holes for the 6mm part?

The 4 holes are each about 3/32” diameter, just under 1/8”.

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⚙️ Lock in precision, power your passion.

COMPLETE DIY READY KIT - Includes 4 flange couplings, 8 M3 fastening screws, and a mini hex wrench—everything you need to upgrade instantly.
VERSATILE COMPATIBILITY - Ideal for RC airplanes, boats, and other DIY motorized models, making your projects run smoother and last longer.
ENGINEERED FOR ENDURANCE - Crafted from premium 45# steel with heat and electroplated treatment for unmatched strength and insulation.
PRECISION FIT GUARANTEED - Exact 6mm inner diameter and M3 screw holes ensure seamless shaft alignment and stability in your RC models.
EFFORTLESS INSTALLATION REPLACEMENT - Rigid guide design simplifies assembly, saving you time and frustration during upgrades or repairs.

This 4-piece set of 6mm flange coupling connectors is crafted from durable 45# steel with heat and electroplated finishing, ensuring superior strength and insulation. Designed for RC model motors, each kit includes M3 fastening screws and a mini hex wrench for easy installation. Perfect for enhancing shaft stability and alignment in DIY RC airplanes, boats, and other motorized projects.

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Material	Metal
Fastener Type	Flange, Hex
Thread Size	m3
Exterior Finish	Aluminum,Steel
Color	Silver
Metal Type	Alloy Steel, Aluminum, Copper
Brand	daier
Thread Type	Iso Metric
Inside Thread Size	M3
Thread Style	Metric
Thread Class	Class 2A
Size	6mm
Item Diameter	6 Millimeters
Number of Pieces	4
Manufacturer	daier
Part Number	H418*4
Item Weight	1.41 ounces
Item model number	H418*4
Shape	Cylindrical
Head Style	Flat
Cutting Diameter	6 Millimeters
Batteries Included?	No
Batteries Required?	No

4Pcs 6mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors

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