I’m a China-based manufacturer, and I specialize in precision fasteners and hardware, including the M4 Washer that our clients trust for reliable joining and spacing. We stock flat washers in stainless steel 304, 316, and zinc-plated steel, with thicknesses ranging from 0.5 mm to 1.6 mm to suit your load requirements. The M4 Washer I offer delivers excellent corrosion resistance, dimensional stability, and smooth bearing surfaces to prevent galling in aggressive environments. I can supply standard sizes with tight tolerances (±0.05 mm) and offer custom chemistries or passivation per your spec. Lead times is competitive, and I can ship directly to factories of B2B purchasers worldwide. My team works closely with engineers to recommend the right washer for auto, electronics, or machinery assemblies, ensuring fast ROI and reduced assembly torque fluctuations. If you seek reliable supply and predictable pricing, I’m ready to discuss MOQs, certifications, and large-volume discounts.
The M4 washer is trending beyond standard catalogs as buyers push for custom solutions. In high‑volume electronics, automotive, and machinery assemblies, a tailor‑made washer can cut assembly steps, improve load distribution, and reduce risk of loosening. Global procurement teams are increasingly requesting washers tuned to exact thickness, inner diameter, material, and finish, with compatibility for automated insertion and precise torque requirements. This shift favors suppliers who can blend manufacturing discipline with design flexibility. When evaluating partners, seek capability in material options (304/316 stainless, brass, aluminum, engineered polymers), finishes (zinc, black oxide, passivation, PVD), and customized geometry (shoulder, lock, wave; nonstandard inner/outer diameters). Ask about tolerances, heat treatment, post‑processing, QC, lot traceability, and certifications. Request scalable lead times, flexible MOQs, and packaging that supports automation. True customization with reliability lowers total costs and strengthens global supply resilience.
| Hole d (mm) | Outside Diameter D (mm) | Thickness t (mm) | Material | Finish | Standard | Hardness (HB) | Temp Range (°C) |
|---|---|---|---|---|---|---|---|
| 4.0 | 9.0 | 0.8 | Stainless Steel 304 | Polished | ISO 7089 | 170-200 | -60 to 260 |
| 4.0 | 9.0 | 1.0 | Stainless Steel 316 | Passivated | ISO 7089 | 180-210 | -60 to 300 |
| 4.0 | 9.0 | 0.5 | Carbon Steel (AISI 1018) | Zinc Plated | DIN 125 | 160-190 | -40 to 140 |
| 4.0 | 11.0 | 0.8 | Aluminum 6061-T6 | Anodized | DIN 125 | 60-80 | -40 to 120 |
| 4.0 | 9.0 | 1.6 | Brass (CuZn39Pb3) | Bright | DIN 125 | 70-100 | -50 to 120 |
| 4.0 | 8.0 | 0.8 | Stainless Steel 304 | Satin | ISO 7089 | 170-200 | -60 to 260 |
| 4.0 | 12.0 | 1.0 | Stainless Steel 316L | Polished | ISO 7089 | 190-210 | -60 to 300 |
| 4.0 | 9.0 | 0.9 | Nylon 6/6 | Natural | N/A | N/A | -40 to 120 |