Square Washer — Timber & Heavy Construction
Square washers (square plate washers) are heavy steel plates with a center hole, used to distribute load over wood members, with anchor bolts, and in heavy timber construction. Significantly thicker than standard flat washers.
Specifications
| Common Sizes | 50 × 50 × 5 mm, 75 × 75 × 6 mm, 100 × 100 × 8 mm |
|---|---|
| Hole Size | Match bolt diameter (typically slightly oversize) |
| Material | Carbon steel |
| Surface Finish | Plain, HDG |
| Application | Timber framing, anchor bolts, structural connections |
Frequently Asked Questions
When is a square washer used instead of a fender washer?
Square washers (often supplied as plate washers) are heavier and used in structural and timber connections where the washer must resist crushing of soft wood under heavy load. Fender washers are thinner stamped washers for general distributed-load applications.
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