Description
Overview:
Form A Flat Washers (Heavy Duty), Zinc Plated, are plain round washers used to spread the load under a bolt head or nut and protect the mating surface. Made from zinc-plated steel for corrosion resistance, they are suitable for indoor and outdoor assemblies on construction fixings, garden machinery, power tools, and general plant and equipment. With a 4 mm internal diameter (approx. 0.16 in), these washers are sized for M4 bolts, set screws, and studs, helping to maintain even clamping force and reduce the risk of pull-through or surface marking. The flat faces give a stable bearing surface, improving joint reliability in metalwork, timber fixtures, brackets, guards, and housings. Supplied in a bulk pack of 1000 for workshop, site, and maintenance use.
Key Features:
- Heavy-duty Form A pattern for robust, everyday use on fixings and assemblies
- Zinc-plated steel for reliable corrosion resistance in damp or outdoor environments
- 4 mm I.D. (approx. 0.16 in) to suit M4 fasteners for a neat, consistent fit
- Distributes load to prevent damage, embedment, and loosening under vibration
- Smooth, flat bearing faces to protect painted, plated, or softer materials
- Helps maintain clamp force and joint integrity over time
- Versatile across construction, machinery, automotive, and general maintenance tasks
- Bright zinc finish offers a clean, professional look that's easy to identify in kits
- Supplied in a pack of 1000 for efficient stocking and reduced downtime
- Simple to install with standard hand tools; no special tools required
Typical Applications:
Used with M4 bolts, nuts, and machine screws on bracketry, guards, housings, panels, conduit clips, small engine covers, garden machinery fixtures, racking, timber-to-metal fixings, light machinery mounts, and electrical enclosures. Ideal for repair, assembly, and maintenance where spreading clamp force and protecting surfaces are important.
Also known as:
Plain washers, Form A washers, load-spreading washers, flat spacers, shims (informal), M4 washers, heavy-duty flat washers, zinc-plated plain washers.
Product Specifications
| L&S Part No. | 903 0836 |
|---|---|
| OEM No. | 915200 |
| Unit of Sale | Pack of 1000 |
| Size | 4mm I.D |
| Key Features | - Heavy-duty Form A pattern for robust use on fixings - Zinc-plated steel for corrosion resistance - 4 mm internal diameter suits M4 fasteners - Distributes load to prevent damage and loosening - Supplied in a bulk pack of 1000 units |
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