Unifix Sela Washers M8 x 28 - Black
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DebenhamsUnifix Unisex Black Sela Washers M8 X 28 - Box Of 75 In
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OnBuy.comSela Washers M8 X 28 - 9Selawash/005 - Box Of 75 7611188000022
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B&QB&Q - Sela Washers M8 X 28 (External 28mmInternal 8mm)75 Pack9Selawash/005
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Product Information
Full details
The Unifix Sela Washers M8 x 28 are essential for professional contractors and DIY enthusiasts working on roofing, construction, or general fastening projects requiring a secure, weather-resistant seal. These washers provide a stable, durable connection for M8 screw applications, ensuring structural integrity while offering a sleek, professional black finish that blends into various materials like wood and metal; however, users should note that they are specifically sized for M8 hardware and may not be compatible with larger bolt diameters.
All features
| Colour | Black |
|---|---|
| Model Part Number | 9SELAWASH/005 |
| Brand | Unifix |
Extended Product Information
FAQs
Are these washers waterproof?
While they provide a stable surface, they do not inherently include a rubber seal; ensure you are using appropriate gaskets if the application requires a watertight seal.
Can these be used with M6 or M10 bolts?
No, these are strictly designed for M8 screws to ensure a proper fit.
How many come in a box?
Each box contains 75 washers.
Is the black finish paintable?
The finish is designed to be permanent, but it can be painted if you need to match a specific custom color.
Can I use these for outdoor roofing?
Yes, they are designed for construction and roofing applications where durable fastening is required.
Troubleshooting
Washer does not fit over the screw
Verify the screw is a true M8 size; the washer is calibrated specifically for 8mm diameters.
Black coating is chipping during installation
Reduce the torque setting on your drill or use a hand driver to seat the washer without damaging the finish.
Fastener feels loose after installation
Check that the washer is positioned flat and the screw is properly threaded into the material beneath.
Pros and Cons
Pros
- Durable construction for long-lasting fastening
- Professional black finish hides well on dark surfaces
- Standardized sizing ensures a reliable fit for M8 hardware
- Wide external diameter prevents material crushing
Cons
- Not compatible with screws larger than 8mm
- Limited to specific M8 thread applications
- Black coating may chip if overtightened with heavy-duty tools
Setup, Compatibility & Care
To ensure optimal performance, verify that your fastener is a standard M8 gauge before installation. Slide the washer onto the screw until it sits flush against the screw head. When tightening, apply pressure evenly to ensure the washer lies flat against the surface; excessive torque with impact drivers may cause the black finish to flake or the washer to deform. To maintain the finish and structural integrity, store these in a dry environment to prevent moisture accumulation in the box, and if used in highly corrosive salt-air environments, inspect periodically for signs of oxidation.