At Ananka Fasteners Pvt Ltd, we manufacture fasteners to the dimensional requirements of DIN 128 A/B. DIN 128 covers spring lock washers made from a closed ring that is pre-formed for spring action. Form A is curved (domed) and Form B is waved. The stored spring force maintains bolt tension and resists loosening under vibration on non-marring surfaces.
DIN 128 covers spring lock washers made from a closed ring that is pre-formed for spring action. Form A is curved (domed) and Form B is waved. The stored spring force maintains bolt tension and resists loosening under vibration on non-marring surfaces.
Curved (Form A) / waved (Form B) spring lock washer
Key dimensions for common sizes are listed below.
| Nominal Size | Inside Dia d1 (mm) | Outside Dia d2 (mm) | Thickness s (mm) | Overall Height h (mm) |
|---|---|---|---|---|
| M3 | 3.1 | 6.2 | 0.7 | 1.3 |
| M4 | 4.1 | 7.6 | 0.8 | 1.4 |
| M5 | 5.1 | 9.2 | 1.0 | 1.7 |
| M6 | 6.1 | 11.8 | 1.3 | 2.2 |
| M8 | 8.1 | 14.8 | 1.6 | 2.75 |
| M10 | 10.2 | 18.1 | 1.8 | 3.15 |
| M12 | 12.2 | 21.1 | 2.1 | 3.65 |
| M14 | 14.2 | 24.1 | 2.4 | 4.3 |
| M16 | 16.2 | 27.4 | 2.8 | 5.1 |
| M18 | 18.2 | 29.4 | 2.8 | 5.1 |
| M20 | 20.2 | 33.6 | 3.2 | 5.9 |
N/A – spring washer
Related and equivalent standards include DIN 127 (helical spring washer), DIN 137 (light curved/wave washer) and DIN 6796 (conical spring washer).
For the official DIN standards catalogue, see the DIN standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We produce DIN 128 A/B fasteners in carbon and alloy steel, austenitic and duplex stainless, and high-nickel, titanium and copper alloys — for structural, machinery and process applications worldwide.
For technical documentation and quotations, buyers can also review the Ananka Fasteners manufacturing and supply range or contact the team through the fastener enquiry and technical support page.
Ananka Fasteners supplies every lot with full material traceability and third-party testing on request.
DIN 128 covers spring lock washers made from a closed ring that is pre-formed for spring action. Form A is curved (domed) and Form B is waved. The stored spring force maintains bolt tension and resists loosening under vibration on non-marring surfaces.
Ananka Fasteners manufactures DIN 128 A/B in sizes from M3–M20. See the Dimensional Table above for the complete size breakdown.
N/A – spring washer
We produce DIN 128 A/B fasteners in carbon and alloy steel, austenitic and duplex stainless, and high-nickel, titanium and copper alloys — for structural, machinery and process applications worldwide.
Yes. For a quotation, provide the required nominal size, material grade, quantity and any inspection or certificate requirements.
Need a fastener manufactured to DIN 128 A/B for an industrial project? Send the required fastener type, size, material grade, quantity and certification requirements to Ananka Fasteners. Our team can review the requirement and provide technical and commercial information for standard or custom configurations.
Recommended RFQ details: DIN 128 A/B requirement, nominal size, material grade, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Dimensions compiled per DIN 128 A/B and industry references; provided for reference only — confirm against the current edition of the standard before design use.
