Zinc Plated Spring Steel Split Lock Washers DIN 127B Helical Fasteners
Always fit with the split ends facing the bolt head or nut for correct locking action.
Secure your bolted joints against loosening with our premium DIN 127B Split Lock Washers, zinc plated spring steel.
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DIN 127 Type B Profile
The long-standing industry reference for helical spring lock washer dimensions.
Through-Hardened Spring Steel
Consistent spring-back and reliable clamping force retention under load.
Zinc Plated, Clear/Blue Passivate
Bright, general-purpose corrosion-resistant finish for indoor and moderate outdoor use.
Helical Coil Design
Stores spring energy when compressed, continuing to push back against the bearing face as a joint settles or experiences vibration.
Sharp Square-Cut Offset Coil Ends
Bite slightly into the bearing surfaces on each side, adding mechanical resistance to counter-rotation.
Eight Sizes M6-M20
Covering the great majority of standard metric fastener sizes used in general engineering and construction.
Technical Specification
| Material | Through-Hardened Spring Steel |
| Finish | Zinc Plated, Clear/Blue Passivate |
| Standard | DIN 127 Type B |
| M6 (InnerØ/OuterØ max/Thickness) | 6.1-6.5mm / 11.8mm / 1.5-1.7mm |
| M8 (InnerØ/OuterØ max/Thickness) | 8.1-8.5mm / 14.8mm / 1.9-2.1mm |
| M10 (InnerØ/OuterØ max/Thickness) | 10.2-10.7mm / 18.1mm / 2.05-2.35mm |
| M12 (InnerØ/OuterØ max/Thickness) | 12.2-12.7mm / 21.1mm / 2.35-2.65mm |
| M14 (InnerØ/OuterØ max/Thickness) | 14.2-14.7mm / 24.1mm / 2.85-3.15mm |
| M16 (InnerØ/OuterØ max/Thickness) | 16.2-17.0mm / 27.4mm / 3.3-3.7mm |
| M18 (InnerØ/OuterØ max/Thickness) | 18.2-19.0mm / 29.4mm / 3.3-3.7mm |
| M20 (InnerØ/OuterØ max/Thickness) | 20.2-21.2mm / 33.6mm / 3.8-4.2mm |
