The washer has a helical (split) design, allowing it to exert continuous spring tension against the nut and bolt. This prevents loosening and maintains a firm, long-lasting connection, even under heavy mechanical stress. It is commonly used in machinery, construction, automotive, electrical installations, industrial assemblies, and outdoor structural applications.
Key Features:
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Material: Galvanized Iron (GI)
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Type: Split/Helical Spring Washer
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Purpose: Locks nuts and bolts, prevents loosening due to vibration
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Finish: Hot-dip galvanized or electro-galvanized for corrosion resistance
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Strength: Heavy-duty design for high-load applications
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Durability: Long service life even in harsh conditions
Specifications (Common Sizes)
Values are typical for heavy-duty GI spring washers (DIN 127 / IS standards).
Metric Sizes
| Bolt Size (M) | Inner Diameter (ID) | Outer Diameter (OD) | Thickness (T) | Washer Height (Split Rise) |
|---|---|---|---|---|
| M6 | 6.1 mm | 10.8 mm | 2.0 mm | 3.0–3.5 mm |
| M8 | 8.1 mm | 13.8 mm | 2.5 mm | 3.5–4.0 mm |
| M10 | 10.2 mm | 17.5 mm | 3.0 mm | 4.5–5.0 mm |
| M12 | 12.2 mm | 21.0 mm | 3.5 mm | 5.0–6.0 mm |
| M16 | 16.2 mm | 28.2 mm | 4.0 mm | 7.0–8.0 mm |
| M20 | 20.2 mm | 34.0 mm | 5.0 mm | 8.0–9.0 mm |
| M24 | 24.5 mm | 40.0 mm | 6.0 mm | 9.0–10.0 mm |
