Description
Overview:
The 6 mm Cap Nut is an original Honda fastener designed for secure, tidy terminations on M6 studs and bolts used in small plant and pump assemblies. Made from steel with a silver, corrosion‐resistant plated finish, its domed (acorn) head encloses the exposed thread end to reduce corrosion, minimise snagging, and protect nearby components. The hex form allows easy tightening with common hand tools. Used on Honda WB20XT water pumps, it helps resist vibration and prevents loosening, supporting reliable operation and safe performance. Identified by Honda OEM number 90281-YB4-000, this cap nut provides an accurate fit for maintenance and repairs where an M6 closed-end nut is specified. Suitable for tradespeople and DIY users maintaining Honda pumps and similar machinery requiring durable, vibration‐resistant fixings.
Key Features:
- Honda OEM fastener for assured fit and performance (90281-YB4-000)
- M6 thread cap nut with domed, closed end to shield and finish exposed threads
- Steel construction with corrosion‐resistant plated finish for long service life
- Secure under vibration; helps prevent loosening on pump assemblies and brackets
- Hex head for straightforward fitting and removal with a spanner or socket
- Correct fit for Honda WB20XT water pumps; suitable where an M6 cap nut is specified
- Neat, low‐profile finish reduces snag risks and protects users and components
- OEM specification for consistent seating and clamp load
Typical Applications:
Commonly used to fasten pump covers, frames, brackets, and guards on Honda WB20XT water pumps. Also suitable for general M6 applications where a closed-end nut is preferred, such as protecting thread ends on vibrating equipment, securing hose flanges or mounting points, and providing a clean, durable finish in outdoor or damp environments.
Also known as:
Acorn nut, dome nut, domed cap nut, closed-end hex nut, M6 acorn nut, protective cap nut, M6 domed nut, closed cap nut.
Fits Models:
WB20XT
Alternate Part Numbers:
90281-YB4-000, 90281YB4000, 1961648
Product Specifications
| L&S Part No. | 90281 YB4 000 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Honda |
| OEM No. | 90281YB4000 |
| Unit of Sale | 1 |
| Machine Type | Pumps |
| Fits Brands | Honda |
| Key Features | - Honda OEM fastener for assured fit (90281-YB4-000) - M6 thread cap nut with domed, closed end - Steel with corrosion-resistant plated finish - Secure under vibration; prevents loosening - Fits Honda WB20XT water pumps |
| Fits Models | WB20XT |
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