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DIN, ISO, BS & JIS Washers Suppliers & Exporters
For critical engineering, structural steelwork, and equipment assemblies requiring certified flat and heavy-duty washers, Aurum Overseas delivers precision fasteners. As a premier DIN, ISO, BS & JIS Washers Supplier and Exporter, we manufacture components that prevent bolt loosening, protect joint surfaces, and maintain load distribution under high torque.
We stock metric and imperial sizes across DIN 125, DIN 9021, ISO 7090, BS 4320, JIS B 1256, and EN 14399 standards. Available in stainless steel, duplex, nickel alloys, cupro nickel, titanium, and carbon steel, our inventory features factory-direct pricing and full EN 10204 3.1 MTR certifications for rapid dispatch.
Washers Standards & Specifications
| Parameter | Standard Range / Specification |
|---|---|
| Manufacturing Standards | DIN 125 (A/B), ISO 7090, ISO 7089, DIN 9021, EN 14399, BS 4320, JIS B 1256, IS 2016, UNI 6592, SAE J411, DIN 34817 |
| Metric Size Range | M3 to M100 (Custom sizes up to M150 available) |
| Imperial Size Range | #4 to 4" Nominal Bore (NB) |
| Thickness Range | 0.5 mm to 12 mm (Metric) / 0.03" to 0.50" (Imperial) |
| Tolerance Class | Fine (Class A per ISO 4759-3) / Medium (Class B) |
| Forming Method | Cold Formed, Stamped, Machined, Precision Ground |
| Hardness Levels | 100 HV, 140 HV, 200 HV, 300 HV, 300 to 380 HV (Hardened Structural) |
International Washer Standards
Choosing the right washer standard helps ensure proper fit, load distribution, and reliable fastening performance. Use the comparison below to quickly match international and regional standards to your application.
| Standard Code | Standard Type | Primary Function | Similar Standards |
|---|---|---|---|
| DIN 125 | Metric Flat Washer | Everyday medium-series flat washer for general bolt and nut assemblies. | ISO 7089 (Form A) / ISO 7090 (Form B) |
| ISO 7090 | International Flat Washer | Precision chamfered flat washer for smooth joint load distribution. | DIN 125 Form B |
| DIN 9021 | Wide Flat Washer | Extended outer diameter (3 × Nominal ID) to spread loads on soft materials. | ISO 7093 |
| EN 14399 | High-Strength Structural | Hardened structural washer built for preloaded bolt assemblies in steel builds. | EN 14399-5 / EN 14399-6 |
| SAE J411 | American Standard (SAE) | Carbon and alloy steel washers designed for automotive and heavy machinery bolting. | ASTM F436 |
| BS 4320 | British Standard | Bright metal washers available in various outer diameters (Forms A through D). | DIN 125 / ISO 7089 |
| JIS B 1256 | Japanese Industrial | Standard polished and general-purpose flat washers for Japanese equipment. | ISO 7089 |
| IS 2016 | Indian Standard | Plain washers designed for general engineering and industrial plant equipment. | DIN 125 |
| UNI 6592 | Italian Standard | Normal-series flat washers widely used across European industrial machinery. | DIN 125 A / ISO 7089 |
| DIN 34817 | Specialized Washer | Flat washer designed specifically for plastic and composite bolted joints. | Specialty Plastic Mounting |
Types of Standard Washers by Industrial Use
Flat Washers (DIN 125, ISO 7090, UNI 6592, IS 2016)
Purpose: Distribute tightening loads around standard clearance holes.
Features: Standard and chamfered-edge designs for general fastening.
Applications: Pumps, motors, machinery, pressure vessels, and maintenance.
Wide Flat Washers for Enhanced Load Distribution (DIN 9021)
Purpose: Spread clamping loads over a larger surface area.
Features: Large outside diameter helps reduce surface deformation.
Applications: Sheet metal, timber, plastics, fiberglass, and soft materials.
Heavy-Duty Structural Washers (EN 14399, SAE J411)
Purpose: Support high-load and preloaded structural connections.
Features: High-strength construction for demanding bolting applications.
Applications: Bridges, structural steel, cranes, offshore structures, and heavy equipment.
Special Purpose Washers (BS 4320, JIS B 1256, DIN 34817)
Purpose: Meet specific regional, OEM, or material-interface requirements.
Features: Specialized dimensions and designs for particular assemblies.
Applications: OEM machinery, automotive equipment, marine systems, and plastic assemblies.
Available Washer Materials & Grades
| Material Category | Available Grades / Alloys |
|---|---|
| Stainless Steel | SS 304/304L/304H, SS 310/310S/310H, SS 316/316L/316Ti, SS 317L, SS 321/321H, SS 347/347H, SS 446, SS 410, SS 904L, 17-4 PH Stainless Steel, SMO 254 (6Mo) |
| Duplex & Super Duplex Steel | Duplex S31803 (F51), Duplex S32205, Super Duplex S32750 (Grade 2507 / F53), Super Duplex S32760 (Zeron 100 / F55) |
| Nickel Alloys | Inconel 600, Inconel 601, Inconel 625, Inconel 718, Incoloy 800/800H/800HT, Incoloy 825, Incoloy 925, Inconel 330 / 660 (A286) |
| Hastelloy | Hastelloy C22, Hastelloy C276, Hastelloy B2/B3, Hastelloy X |
| Monel | Monel 400, Monel 500 |
| Copper Nickel / Nickel | Copper Nickel / Nickel |
Quality Testing & Inspection
As a trusted DIN, ISO, BS & JIS Washers Supplier, Aurum Overseas conducts rigorous testing on all standard washer batches:
- Dimensional Accuracy Checks: Microscopic optical comparator and micrometer audits confirm inner diameter, outer diameter, thickness, and chamfer tolerances.
- Material Composition Testing (PMI): Spectrometric X-ray verification checks exact metal grades to guarantee material compliance.
- Hardness Testing: Rockwell and Vickers hardness testing ensure structural washers (such as EN 14399 and ASTM F468/F436) meet specified load-bearing limits.
- Flatness & Surface Inspection: Checks ensure surfaces remain smooth and flat, free from burrs, cracks, or stamping ridges.
Global Export Markets
Aurum Overseas supplies fully certified DIN, ISO, BS & JIS Washers to industrial projects across:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Norway
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Singapore
Malaysia
Australia
Frequently Asked Questions
DIN 125 Form B and ISO 7090 are virtually identical chamfered flat washers. ISO 7090 is the updated international standard that replaced DIN 125 in many modern global manufacturing specifications.
DIN 9021 washers feature an outer diameter three times larger than the inner hole. They are used when clamping loads must be spread across soft materials like wood, plastic, or light sheet metal to prevent surface crushing.
Yes. EN 14399 washers are specifically hardened and heat-treated to perform alongside Grade 8.8 and 10.9 preloaded structural bolts in heavy steel construction without deforming under torque.
Yes. Aurum Overseas manufactures and stocks standard washers in stainless steel, duplex, Inconel, Monel, Hastelloy, Cupro Nickel, and Titanium according to all major DIN, ISO, BS, and JIS standards.
Every order is supplied with complete EN 10204 3.1 Mill Test Reports detailing material heat numbers, chemical composition, hardness values, and dimensional checks.
Contact Aurum Overseas
Aurum Overseas provides rapid delivery of certified DIN, ISO, BS & JIS Washers for global industrial projects.
Contact our sales engineering team for technical guidance, material certificates, and instant pricing.