DIN 125 Form A & Form B Plain Washers, ISO 7089 / ISO 7090 Flat Washers in A2 / A4 Stainless Steel and Carbon Steel: Manufacturer, Stockist & Exporter in India
Jade Alloys is a trusted manufacturer, supplier and exporter of DIN 125 Washers in India, offering high-quality washers for various industrial fastening applications. Our DIN 125 Flat Washers are manufactured to meet applicable dimensional and quality requirements, ensuring reliable performance, accurate fitment and consistent product quality. These washers are widely used in industries such as automotive, construction, engineering, power generation, petrochemical processing and heavy machinery manufacturing.
DIN 125 Washers are flat circular washers designed to distribute the load of a threaded fastener over a larger surface area. They are commonly installed beneath nuts or bolt heads to protect the connected surfaces, reduce surface damage and provide a stable fastening assembly. Their simple design and practical functionality make them an essential component in industrial and structural applications.
At Jade Alloys, we focus on supplying DIN 125 Washers in different material grades, sizes and specifications to meet diverse customer requirements. With a commitment to product quality, competitive pricing and timely delivery, we serve domestic and international buyers looking for dependable industrial fastening solutions.
Description of DIN 125 Washers
DIN 125 is a German industrial standard that specifies the dimensions and requirements for flat washers. These washers feature a circular shape with a centrally positioned hole through which a bolt or screw passes. They are generally placed between the fastener and the contact surface to distribute clamping force and help prevent damage to the connected components.
DIN 125 Flat Washers are designed to provide a larger bearing surface, improve load distribution and support secure fastening connections. They are available in different material options, including stainless steel, carbon steel and other alloy materials, depending on the application and customer specifications.
What DIN 125 washers are
DIN 125 washers are flat, round plain washers. The hole is slightly larger than the bolt and the outer diameter is about twice the hole. They are not locking washers. They share the load, protect painted or soft surfaces, and cover a small clearance gap around the bolt. Form A is plain on both faces; Form B is chamfered at the hole so it clears the radius under a bolt head. The full dimension table and ISO equivalents are on the DIN 125 standard page.
Why buy DIN 125 washers from Jade Alloys
- Right form and material for the joint: we confirm Form A or B, and A2 or A4, against your drawing before quoting.
- Matched with the rest of the assembly: supplied with DIN 933 bolts and DIN 934 nuts from the same order [CONFIRM page and range].
- Weight and quantity planning: calculated weight per 1,000 pieces and pieces per kilogram for every standard size, below.
- Export-ready: documentation and packing for the Gulf, Asia and Europe.
DIN 125 washers at a glance
| Item | Details |
|---|---|
| Common names | DIN 125 washer, DIN 125 flat washer, metric plain washer, ISO 7089 washer (Form A), ISO 7090 washer (Form B) |
| Standards | DIN 125 Form A and Form B; DIN EN ISO 7089 and 7090 |
| Forms | Form A, plain; Form B, chamfered at the hole |
| Sizes | M3 to M64 stock [VERIFY]; M1 to M100 on request |
| Materials | Carbon steel; A2 stainless (304, 1.4301); A4 stainless (316, 1.4401); other materials on request |
| Finishes (steel) | Plain, zinc-plated, hot-dip galvanized |
| Hardness (steel) | 200 HV or 300 HV class per ISO 7089 / 7090 |
| Certificates | EN 10204 3.1 on request [VERIFY]; third-party inspection by agreement |
| Packing | Cartons or bags on pallets, counted or weighed |
| Supply | Ex-stock Mumbai; worldwide export |
Materials and finishes of Din 125 Washers
| Material | Grade | Finish | Where it is used |
|---|---|---|---|
| Carbon steel | 200 HV or 300 HV class | Plain, zinc-plated, hot-dip galvanized | General engineering, structural steel, automotive |
| Stainless steel A2 | 304 / 1.4301 | Plain, passivated | Indoor and outdoor general use, food equipment |
| Stainless steel A4 | 316 / 1.4401 | Plain, passivated | Coastal, marine and chemical exposure |
| Alloy steel | As per drawing | Plain, zinc-plated | Higher-hardness joints |
A2 and A4 are the fastener grade names under ISO 3506: A2 is 304-type, and A4 is 316-type with molybdenum added for chloride resistance. Hot-dip galvanizing adds coating thickness to the washer, so confirm the fit with the bolt before ordering.
DIN 125 Washer Weight Chart
Approximate weight in kilograms per 1,000 pieces, calculated from the nominal DIN 125 Type A dimensions above using standard carbon steel density (7.85 g/cm3):
| Size | Weight |
|---|---|
| M1.6 | 0.024 |
| M1.7 | 0.031 |
| M2 | 0.037 |
| M2.3 | 0.092 |
| M2.5 | 0.088 |
| M2.6 | 0.127 |
| M3 | 0.119 |
| M3.5 | 0.155 |
| M4 | 0.308 |
| M5 | 0.443 |
| M6 | 1.02 |
| M7 | 1.39 |
| M8 | 1.83 |
| M10 | 3.57 |
| M12 | 6.27 |
| M14 | 8.62 |
| M16 | 11.3 |
| M18 | 14.7 |
| M20 | 17.2 |
| M22 | 18.3 |
| M24 | 32.3 |
| M26 | 43.7 |
| M27 | 42.3 |
| M28 | 40.9 |
| M30 | 53.6 |
| M32 | 77.4 |
| M33 | 75.3 |
| M35 | 94.3 |
| M36 | 92.1 |
| M38 | 136 |
| M39 | 133 |
| M40 | 130 |
| M42 | 183 |
| M45 | 220 |
| M48 | 294 |
| M50 | 284 |
| M52 | 330 |
| M55 | 431 |
| M56 | 425 |
| M58 | 472 |
| M60 | 458 |
| M64 | 492 |
| M68 | 586 |
| M72 | 626 |
| M76 | 749 |
Weights are calculated from the nominal DIN 125 size (hole diameter, outer diameter and thickness) at 7.85 g/cm³ for carbon steel and 7.93 g/cm³ for stainless steel. Actual weight varies with tolerance and coating; zinc and hot-dip galvanizing add weight. For the dimensions behind each size, see the DIN 125 standard page. For other shapes use the metal weight calculator.
Applications of DIN 125 washers
- Structural steel and construction: under bolt heads and nuts on steel frames, brackets and supports.
- General engineering and machinery: machine frames, guards, pumps and gearboxes.
- Automotive and rail: chassis and body fixings where the clamped surface needs protecting.
- Power and electrical: switchgear, panels and cable supports, usually A2.
- Oil, gas and chemical plant: pipe supports and skids, A4 where chlorides are present.
- Food and pharmaceutical equipment: A2 or A4 with a passivated finish.
- Coastal and marine fittings: A4 stainless, not A2
Quality and testing
Each lot is checked for size against DIN 125 and for finish. On request: hardness test (HV), EN 10204 3.1 material certificate, positive material identification for stainless steel, coating thickness and salt spray report for plated or galvanized washers, and third-party inspection by SGS, Bureau Veritas or TUV.
Frequently Asked Questions - Din 125 Washers
1. Which sizes and materials of DIN 125 washers do you supply?
2. What is the difference between A2 and A4 DIN 125 washers?
3. DWhich finish should I choose for outdoor use?
4. How do you calculate the weight of a DIN 125 washer?
5. How many DIN 125 M8 washers are in one kilogram?
6. Which certificates come with DIN 125 washers?
7. What is the HSN code for DIN 125 washers in India?
Get a Quote for Din 125 Washers
Send the form (A or B), size, material, finish, quantity and destination. Our team replies the same working day with price, availability and certificates.
