Metric Zinc-Plated Flat Washers (DIN 125)
Protect bolted surfaces and optimize clamping force across structural joints, electrical panels, plumbing supports, and timber framing with our Bright Zinc-Plated Flat Steel Washers (DIN 125 / ISO 7089 Form A). Precision-stamped from high-grade carbon steel with smooth, deburred edges, these essential hardware fasteners sit between the bolt head or nut and the joint surface to distribute tightening loads evenly.
By increasing the bearing surface area beneath threaded fasteners, flat washers prevent crushing, surface galling, and pull-through when bolting into soft materials such as aluminum profiles, timber, plastic wall plugs, and thin sheet metal. The bright electro-zinc plated finish provides a clean metallic shine and dependable protection against atmospheric oxidation, humidity, and rust in interior and sheltered exterior applications.
Key Features
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Uniform Load Distribution: Expands the surface clamping footprint under bolt heads and hex nuts to prevent surface indentation and material deformation.
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Standardized Metric Precision (DIN 125 A): Manufactured to exact DIN 125 / ISO 7089 dimensional standards for seamless fitment with metric bolts, screws, and threaded rods.
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Corrosion-Resistant Zinc Finish: Bright electro-galvanized coating resists rust, corrosion, and wear in residential, commercial, and industrial environments.
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Smooth Deburred Profile: Stamped with clean inner and outer radii to eliminate sharp burrs that could scratch mating surfaces or snag wiring.
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Versatile Fastener Accessory: Essential pairing for hex head bolts, socket cap screws, self-tapping screws, drop-in anchors, and threaded rod suspensions.
Product Specifications
| Attribute | Specification |
| Product Type | Metric Plain Flat Round Washers (Form A) |
| Dimensional Standard | DIN 125-1 Form A / ISO 7089 / BS 4320 |
| Material | Low-Carbon Steel (Class 100 HV / 140 HV) |
| Finish | Bright Electro-Zinc Plated (Clear Cr3 Passivated) |
| Edge Finish | Smooth Stamped, Deburred Without Chamfer |
| Hardness Class | 100 HV Min. |
| Compatible Fasteners | Hex Bolts, Socket Screws, Threaded Rods, Machine Screws, & Drop-In Anchors |
| Primary Application | Structural Steelwork, Electrical Enclosures, Machinery, Plumbing Support, Furniture Assembly, & General Hardware |
Standard Size Matrix & Technical Specifications (DIN 125 A)
| Nominal Bolt Size | Inner Diameter (d1) | Outer Diameter (d2) | Nominal Thickness (s / h) | Compatible Bolt / Thread Size |
| M3 | 3.2 mm | 7.0 mm | 0.5 mm | M3 Machine Screws & Small Electronics |
| M4 | 4.3 mm | 9.0 mm | 0.8 mm | M4 Bolts & Electrical Panel Equipment |
| M5 | 5.3 mm | 10.0 mm | 1.0 mm | M5 Machine Screws & Bracket Fixings |
| M6 | 6.4 mm | 12.0 mm | 1.6 mm | M6 Hex Bolts & 1/4" Threaded Fasteners |
| M8 | 8.4 mm | 16.0 mm | 1.6 mm | M8 Bolts, Drop-In Anchors, & M8 Threaded Rods |
| M10 | 10.5 mm | 20.0 mm | 2.0 mm | M10 Bolts, Pipe Clamps, & M10 Threaded Rods |
| M12 | 13.0 mm | 24.0 mm | 2.5 mm | M12 Heavy Structural Bolts & Channel Framing |
| M14 | 15.0 mm | 28.0 mm | 2.5 mm | M14 Automotive & Machinery Fasteners |
| M16 | 17.0 mm | 30.0 mm | 3.0 mm | M16 Heavy Steelwork & Mechanical Anchorage |
| M20 | 21.0 mm | 37.0 mm | 3.0 mm | M20 Heavy Flange Bolts & Industrial Structural Joints |
| M24 | 25.0 mm | 44.0 mm | 4.0 mm | M24 High-Capacity Infrastructure Fastening |