Description
Overview
DIN125A specifies the dimensions for flat washers form a, ensuring consistent fit and load distribution in bolted assemblies.
This selected size is specified with diameter M16, thread M16.
Sold in multiples of '200 pieces. 1 Box = '200 pieces.
Material, Grade & Strength
Select the material according to clamp load, corrosion exposure and mating fastener.
Finish & Corrosion Protection
Zinc plating provides sacrificial corrosion protection.
Typical Uses
Used beneath bolt heads and nuts to spread load, protect surfaces, improve locking or provide sealing depending on the washer type.
Technical Tips
- Select the washer type for the application.
- Match the inside diameter to the fastener size.
- Use compatible material and finish.
Dimensions – DIN 125 A / ISO 7089 M16
| Standard | DIN 125 A / ISO 7089 |
|---|---|
| Product | Flat washer, form A |
| Nominal size | M16 |
| Inside diameter (d1) | 17 mm |
| Outside diameter (d2) | 30 mm |
| Thickness (h) | 3 mm |
| Weight (calculated) | 11.3 kg per 1 000 pieces |
Material, Grade & Strength
| Material | Steel |
|---|---|
| Hardness | 100-200 HV (product grade A, 100 HV class) |
Finish & Corrosion Protection
Zinc plated (clear/blue passivated): Electroplated zinc, typically 5-8 um (ISO 4042). Economical protection for dry indoor and light outdoor use; white rust in neutral salt spray typically from ~24-72 h depending on passivate.
DIN 125 A data sheet – all sizes
| Size | Nominal size | Inside diameter (d1) | Outside diameter (d2) | Thickness (h) |
|---|---|---|---|---|
| M2 | M2 | 2.2 mm | 5 mm | 0.3 mm |
| M2.5 | M2.5 | 2.7 mm | 6 mm | 0.5 mm |
| M3 | M3 | 3.2 mm | 7 mm | 0.5 mm |
| M4 | M4 | 4.3 mm | 9 mm | 0.8 mm |
| M5 | M5 | 5.3 mm | 10 mm | 1 mm |
| M6 | M6 | 6.4 mm | 12 mm | 1.6 mm |
| M8 | M8 | 8.4 mm | 16 mm | 1.6 mm |
| M10 | M10 | 10.5 mm | 20 mm | 2 mm |
| M12 | M12 | 13 mm | 24 mm | 2.5 mm |
| M14 | M14 | 15 mm | 28 mm | 2.5 mm |
| M16 | M16 | 17 mm | 30 mm | 3 mm |
| M18 | M18 | 19 mm | 34 mm | 3 mm |
| M20 | M20 | 21 mm | 37 mm | 3 mm |
| M22 | M22 | 23 mm | 39 mm | 3 mm |
| M24 | M24 | 25 mm | 44 mm | 4 mm |
| M27 | M27 | 28 mm | 50 mm | 4 mm |
| M30 | M30 | 31 mm | 56 mm | 4 mm |
| M33 | M33 | 34 mm | 60 mm | 5 mm |
| M36 | M36 | 37 mm | 66 mm | 5 mm |
| M39 | M39 | 40 mm | 72 mm | 6 mm |
| M42 | M42 | 43 mm | 78 mm | 7 mm |
| M45 | M45 | 46 mm | 85 mm | 7 mm |
| M48 | M48 | 50 mm | 92 mm | 8 mm |
Nominal dimensions per DIN 125 A / ISO 7089. Weights are calculated from nominal dimensions and are a guide only (±10%). Values for fit and strength should be confirmed against the standard for critical applications.
Specifications
| Measurement Type | Metric |
|---|---|
| Thread Size | M16 |
| Inner Diameter | 17 |
| Outer Diameter | 30 |
| Diameter | M16 |
| Thickness | 3 |
| Material | Mild Steel |
| Finish | Zinc Plated |
| Grade | Grade 4.8 |
| Standards Met | DIN 125 A |
| Package Quantity | 200 |
| Package Type | Box |