Description
Overview:
Metric spring washers with a 12 mm internal diameter (approx 0.47 in) for use with M12 bolts and set screws. Made from zinc‐plated steel for corrosion resistance and long service life, they use a helical split, rectangular‐section design to maintain clamping force and help prevent fasteners loosening under vibration or thermal cycling. Suitable for construction machinery, plant, garden equipment, automotive repairs, and general workshop use where secure bolted joints are required. Fit directly under the bolt head or nut, and can be paired with a flat washer to spread load on softer surfaces. Supplied in a bulk pack of 250 for convenient stocking on site or in the workshop. Manufacturer reference: MPN 915215.
Key Features:
- 12 mm ID for M12 fasteners (approx 0.47 in), suited to common bolt sizes used in machinery and vehicles
- Rectangular‐section helical split provides spring action to resist loosening from vibration
- Zinc‐plated steel (BZP) for reliable corrosion protection in indoor and outdoor applications
- Bright, smooth finish for easy handling and straightforward installation
- Consistent sizing for predictable fit beneath bolt heads and nuts
- Works well with plain/flat washers where surface protection or load spreading is needed
- Cost‐effective bulk pack of 250 for frequent maintenance and assembly tasks
- Compatible with a wide range of materials, including steel frames, brackets, housings, and fixtures
- Suitable for routine workshop, site maintenance, and field repairs
Typical Applications:
Used to secure M12 bolts in assemblies subject to movement or vibration, such as machinery guards, engine and pump mounts, brackets, frames, agricultural implements, trailers, and garden equipment. Common in automotive repairs, plant maintenance, and fabrication jobs where maintaining bolt preload is important. Ideal for general fastening tasks in construction, engineering, and DIY projects that require dependable resistance to loosening.
Also known as:
Lock washers, split lock washers, helical spring washers, split ring washers, spring lock washers, and BZP spring washers. Sometimes described as anti‐vibration washers or security washers for bolted joints where additional resistance to loosening is required.
Product Specifications
| L&S Part No. | 903 1054 |
|---|---|
| OEM No. | 915215 |
| Unit of Sale | Pack of 250 |
| Key Features | - 12 mm internal diameter for M12 bolts and set screws - Zinc-plated steel for corrosion resistance - Helical split design resists loosening from vibration - Bulk pack of 250 for frequent use - Suitable for construction, automotive, and general workshop use |
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