What are the positions of the 4 holes on the base for the 4mm part? Are there drawings available anywhere?

Dear customer, the inner diameter is 4mm; the outer diameter of the cylinder is 10mm, the height of the cylinder is 10mm, the overall height is 12mm, and the distance between the opposite sides of the base is 16mm. The fixing hole screw is M3, the diameter of the chassis is 22mm, and the height of the chassis is 2mm.

What is the diameter of the hole pattern (4 holes) for the 5mm model? In other words, the distance between the center of two holes that are opposite

Hello, the diameter of the chassis hole of M5 is 16mm, and the mounting screw of the hole is M3, thank you.

Why is it so hard to include the dimension for the 4 mounting holes in the product description? I see all the other relevant measurements.

Dear customer, the product has 4 holes, the size is described in the data, please refer to it.

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Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench

Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench

Product ID: 408258914

Details

Colour
8mm
Exterior finish
Silver
Fastener type
Coupling Hex
Material
steel
Thread size
M 4

📏8mm precision inner diameter

🔩M4 fastening & fixing screws

⚙️Hardened electroplated alloy steel

AR$153285

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Description

⚙️ Lock in precision, power your projects with Sydien!

ROBUST FASTENING SYSTEM - Dual M4 screw holes provide rock-solid stability and easy installation.
VERSATILE COMPATIBILITY - Ideal for RC models and industrial motor shafts, making your setup future-proof and professional-grade.
PRECISION ENGINEERED FIT - 8mm inner diameter ensures seamless shaft alignment for flawless motor performance.
COMPLETE INSTALLATION KIT - Includes 4 couplings, 10 screws, and a mini hex wrench—everything you need to upgrade instantly.
PREMIUM HEAT TREATED ALLOY - Durable, electroplated metal resists wear and corrosion for long-lasting reliability.

The Sydien 4 Pcs 8mm Rigid Flange Shaft Coupling set features heat-treated, electroplated alloy steel couplers with an 8mm inner diameter and M4 fastening screws. Designed for secure shaft-to-plane connections, it includes 4 couplings, 10 screws, and a mini hex wrench, delivering durable, precise, and easy-to-install components perfect for RC motors and industrial applications.

Specifications

ASIN	B07R8CJ36F
ASIN	B07R8CJ36F
Brand	Sydien
Color	8mm
Compatible Groove Diameter	3.18 Millimeters
Customer Reviews	4.7 4.7 out of 5 stars (105)
Customer reviews	4.7 4.7 out of 5 stars (105)
Drive Style	External Hex
Exterior Finish	Silver
Fastener Type	Coupling, Flange, Hex
Finish Types	electroplated
Grade Rating	industrial
Inside Thread Size	M8
Item Diameter	8 Millimeters
Item Dimensions	32 millimeters
Manufacturer	Sydien
Manufacturer	Sydien
Material Type	steel
Metal Type	Alloy Steel, Aluminum, Copper
Number of Pieces	4
Thread Class	Fine
Thread Size	M 4
Thread Style	Right Hand
Thread Type	Iso Metric
UPC	745679813604

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

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AR$153285

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Argentina.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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