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The Range£6.25Visit shop Unifix Form C Washers Bs 4320C Hv140 Bzp - M10 (10.5) - Wsc Ds10 081 - Box Of 200 - Silver
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The Unifix Form C Washers are designed for professional contractors and DIY enthusiasts who require a secure, stable fit for bolts and screws in construction projects. These washers provide excellent load distribution and reliability, meeting strict BS 4320C quality standards. While they offer superior structural integrity, users should ensure they are selecting the specific metric size that matches their fastener diameter to avoid gaps or loose fits.
| Colour | Silver |
|---|---|
| Model Part Number | 1317146 |
| Brand | Unifix |
Form C refers to a specific dimension standard where the outer diameter of the washer is significantly larger than a standard washer, providing better load distribution.
They feature a silver finish that offers moderate resistance, but they are not stainless steel and should be kept dry to prevent corrosion.
They are compatible with most standard metric bolts, provided the thread size corresponds to the washer's internal diameter.
While they provide a stable seat, for high-vibration environments, you may need to pair these with a spring washer or locking nut.
Yes, they are available in multiple metric sizes ranging from M5 to M24 to suit various project requirements.
Verify that the bolt size matches the washer's internal diameter; you may have selected a washer one size too large.
The load may be too concentrated; ensure the Form C washer is centered and that you are not overtightening the fastener beyond the material's structural limits.
To ensure maximum effectiveness, match the washer's internal diameter exactly to your bolt size (e.g., use an M8 washer for an M8 bolt). Always place the washer on the side of the connection being tightened. If using these in outdoor environments, apply a light coat of machine oil if moisture is present to maintain the finish. Store these washers in a dry, organized bin to prevent cross-contamination with different metal types, which can lead to galvanic corrosion over time.
