Description
Overview:
These Metric Spring Washers are split, rectangular-section lock washers made from zinc-plated steel. Designed to maintain clamping force and resist loosening under vibration, shock, or thermal cycling, they are a dependable choice for bolted joints. This pack contains 1,000 washers with a 4 mm inner diameter (approx. 0.157 in, close to 5/32 in), ideal for use with M4 bolts, set screws, and studs. The zinc plating offers general corrosion resistance for indoor use and light outdoor service. Commonly used in assembly and maintenance of tools, machinery, electrical enclosures, fixtures, and plant equipment, they help reduce the risk of joints backing off over time. Straightforward to install, they work alongside standard nuts, bolts, and flat washers to improve joint reliability.
Key Features:
- Inner diameter: 4 mm (approx. 0.157 in)
- Rectangular-section split design provides spring tension to resist loosening
- Zinc-plated steel for general corrosion resistance
- Suited to M4 bolts, set screws, and studs
- Helps maintain preload in vibration-prone assemblies
- Consistent, reliable performance in everyday industrial and DIY use
- Bulk pack of 1,000 for workshop, site, or production needs
- Wide size availability across 5 mm to 20 mm (various pack sizes)
Typical Applications:
Used in fastening assemblies where vibration or movement can loosen standard nuts and bolts. Suitable for power tools, machinery, pumps, compressors, electrical panels, guards and brackets, frames, furniture, metalwork, and general fabrication. Common on plant maintenance, site installs, vehicle accessories, racking and shelving, and DIY projects. Ideal for panel fastening, terminal accessories, motor mounts, and fixtures where a simple mechanical locking aid is required alongside standard fasteners.
Also known as:
Often referred to as split lock washers, helical spring washers, spring lock washers, locking washers, M4 lock washers, anti-vibration washers, and split washers. These names describe the same functional concept of a split, spring-action washer used to help prevent threaded fasteners from loosening in service.
Product Specifications
| L&S Part No. | 903 1059 |
|---|---|
| Unit of Sale | Pack of 1000 |
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