4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors
Details
- MaterialMetal
- Fastener TypeFlange Hex
- Thread SizeM 4
- Exterior FinishAluminum Steel
- Metal TypeAlloy Steel
Description
⚙️ Lock in Power, Drive with Precision!
- UNMATCHED DURABILITY - Crafted from premium 45# steel with heat and electroplated finish for long-lasting toughness and corrosion resistance.
- COMPACT LIGHTWEIGHT - Slim 13mm height and just 3.87 oz per set—engineered to enhance performance without adding bulk.
- PRECISION ENGINEERING - M4 hex screws and flange design ensure a rock-solid, wobble-free shaft connection every time.
- EFFORTLESS INSTALLATION - Includes mini hex wrench and fastening screws for quick, hassle-free setup—get your RC motor running in minutes.
- VERSATILE COMPATIBILITY - Ideal for DIY RC model motors and shaft axis fittings, making it a must-have upgrade for serious hobbyists.
This 4-piece 8mm flange coupling connector set, made from high-grade 45# alloy steel, offers superior strength and corrosion resistance for RC model motors. Featuring M4 hex fasteners and a compact design, it ensures stable, precise shaft connections and includes all necessary hardware for quick installation.
Specifications
| Material | Metal |
| Fastener Type | Flange, Hex |
| Thread Size | M 4 |
| Exterior Finish | Aluminum,Steel |
| Metal Type | Alloy Steel |
| Drive System | External Hex |
| Brand | daier |
| Thread Type | Iso Metric |
| Inside Thread Size | M4 |
| Grade Rating | commercial |
| Thread Style | Left Hand |
| Thread Class | Class 6H |
| Size | 8mm |
| Head Style | Hexagonal |
| Item Diameter | 8 Millimeters |
| Compatible groove diameter | 4 Millimeters |
| Maximum Shear Strength | 370 MPa (53,611 psi) |
| Number of Pieces | 4 |
| Manufacturer | daier |
| Part Number | H420*4 |
| Item Weight | 3.87 ounces |
| Item model number | H420*4 |
| Cutting Diameter | 8 Millimeters |
| Batteries Included? | No |
| Batteries Required? | No |
Reviews
J**W
Excellent
Great quality and fit. Extra screws included.
C**G
Quality item. Weldable.
NIce quality. I actually welded one of these couplers to a fender washer to make a replacement dryer knob that was no longer available.
T**H
Work great, set screws are TINY but functional
These worked well to secure an arm to a "D" shaft.
E**P
Adequate for the price
Adequate for the price
D**S
Adapter
Great
K**D
as advertized
as advertised
D**C
Very well machined
Very well machined parts. I like that they came with the hex wrench. Nice touch.
K**W
Work great!
I've bought multiple sizes and all have been the same quality so I'm posting the same review for all.Inside diameter fits the motor shaft very well and the face is perpendicular to the shaft. The small set screws and threaded holes they go into fit perfect. Even the hex wrench that's included is strong. The parts have no burrs or sharp edges.
Common Questions
Trustpilot
2 weeks ago
2 months ago
