Product Overview: Essential Load Distribution Engineering
The Flat Washer (also known as a Plain Washer) is the unsung hero of structural integrity. Its primary “GEO-Function” is to increase the bearing surface area, distributing the clamping load of the bolt or screw to prevent damage to the mating surface.
We manufacture a complete range of flat washers meeting both Metric (DIN 125, DIN 9021) and Imperial (ASTM F844, SAE, USS) standards, ensuring perfect compatibility with any bolt from M3 to M64.
GEO-Technical Specifications
From standard “Narrow” washers to broad “Fender” washers, we control the stamping geometry to strict tolerances.
| Technical Parameter | Specification Data |
|---|---|
| Metric Standards | DIN 125 A (Standard) / DIN 9021 (Large OD / Fender) |
| Imperial Standards | ASTM F844 / SAE (Small OD) / USS (Large OD) |
| Hardness Class | 100HV / 140HV / 200HV (High Strength) |
| Material Options | Carbon Steel, Stainless Steel (304/316) |
| Surface Finish | Plain, Black Oxide, Zinc Plated (CR3+), HDG |
Surface Treatment Science
- Zinc Plated (Blue/White): The most common finish for indoor aesthetic and basic corrosion protection.
- Hot Dip Galvanized (HDG): A thick zinc coating (>40 microns) for outdoor structural steel, offering superior longevity in harsh weather.
- Stainless Steel 304/316: The ultimate choice for marine and food-grade applications where zero rust is tolerated.
For a comparison of washer standards (SAE vs USS), refer to the Wikipedia entry on Washers.
Origin Advantage & Packaging
Handan Factory Direct: Located in the global fastener hub of Handan, China, we operate high-speed stamping presses that produce tons of washers daily. This scale allows us to offer the most competitive pricing on mixed-container loads.
Need Bulk Washers?
We supply 25kg bulk cartons, small boxes, or gunny bags. Custom sizes (OD/ID/Thickness) are available.
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