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

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

Product ID: 129681369

Details

Color
8mm
Exterior Finish
steel
Fastener Type
Flange
Material
Alloy Steel
Thread Size
M 4

🔩M4 fastening & base screw holes

⚙️8mm precision inner diameter

🛡️Hardened electroplated alloy steel

₩26384

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Description

⚙️ Lock in precision, power your performance!

LOW INERTIA DESIGN - Highly sensitive coupling enables rapid state switching without lag
DURABLE HARDENED ALLOY - Heat-treated and electroplated steel resists rust and oil for long-lasting reliability
VERSATILE COMPATIBILITY - Ideal for RC models, motor shafts, and industrial applications requiring rigid connection
PRECISION ENGINEERED FIT - Ensures perfect shaft alignment for seamless motor performance
COMPLETE INSTALLATION KIT - Includes 4 couplings, fastening screws, and a mini hex wrench for effortless setup

The S SYDIEN 4Pcs 8mm Rigid Flange Shaft Coupling set features hardened, electroplated alloy steel couplers with M4 fastening screws and a mini hex wrench. Designed for precise shaft alignment and low inertia, these compact couplings deliver durable, rust-resistant performance ideal for RC motors and industrial shaft connections.

Specifications

ASIN	B07R8CJ36F
Best Sellers Rank	#211,397 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #74 in Rigid Set Screw Couplings
Brand	S SYDIEN
Color	8mm
Compatible Groove Diameter	3.18 millimeters
Customer Reviews	4.6 4.6 out of 5 stars (156)
Drive Style	External Hex
Exterior Finish	steel
Fastener Type	Flange
Finish Types	electroplated
Grade Rating	industrial
Inside Thread Size	M8
Item Diameter	8 millimeters
Item Dimensions	1.26 inches
Manufacturer	Sydien
Material Type	Alloy Steel
Metal Type	Alloy Steel, Aluminum, Copper
Number Of Items	4
Number of Pieces	4
Outside Diameter	16 millimeters
Screw Head Style	Flange
Set Name	4
Size Name	8mm x 32mm x 10mm x 3mm
Thread Class	Fine
Thread Size	M 4
Thread Style	Right Hand
Thread Type	Iso Metric
UPC	745679813604
Unit Count	4 Count

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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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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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₩26384

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered 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 South Korea.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

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

5 days ago

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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