Dimensions & technical reference
DIN 127 (B):1987
Type B split spring washer. h is section thickness and H is free height. A spring washer alone does not establish resistance to loosening under vibration; select locking measures for the joint.
| Nominal size | d min | d max | n nominal | h nominal | H min · free | H max · free |
|---|---|---|---|---|---|---|
| Φ2 | 2.1 | 2.4 | 0.9 | 0.5 | 1 | 1.2 |
| Φ2.2 | 2.3 | 2.6 | 1 | 0.6 | 1.2 | 1.4 |
| Φ2.5 | 2.6 | 2.9 | 1 | 0.6 | 1.2 | 1.4 |
| Φ3 | 3.1 | 3.4 | 1.3 | 0.8 | 1.6 | 1.9 |
| Φ3.5 | 3.6 | 3.9 | 1.3 | 0.8 | 1.6 | 1.9 |
| Φ4 | 4.1 | 4.4 | 1.5 | 0.9 | 1.8 | 2.1 |
| Φ5 | 5.1 | 5.4 | 1.8 | 1.2 | 2.4 | 2.8 |
| Φ6 | 6.1 | 6.5 | 2.5 | 1.6 | 3.2 | 3.8 |
| Φ7 | 7.1 | 7.5 | 2.5 | 1.6 | 3.2 | 3.8 |
| Φ8 | 8.1 | 8.5 | 3 | 2 | 4 | 4.7 |
| Φ10 | 10.2 | 10.7 | 3.5 | 2.2 | 4.4 | 5.2 |
| Φ12 | 12.2 | 12.7 | 4 | 2.5 | 5 | 5.9 |
| Φ14 | 14.2 | 14.7 | 4.5 | 3 | 6 | 7.1 |
| Φ16 | 16.2 | 17 | 5 | 3.5 | 7 | 8.3 |
| Φ18 | 18.2 | 19 | 5 | 3.5 | 7 | 8.3 |
| Φ20 | 20.2 | 21.2 | 6 | 4 | 8 | 9.4 |
| Φ22 | 22.5 | 23.5 | 6 | 4 | 8 | 9.4 |
| Φ24 | 24.5 | 25.5 | 7 | 5 | 10 | 11.8 |
| Φ27 | 27.5 | 28.5 | 7 | 5 | 10 | 11.8 |
| Φ30 | 30.5 | 31.7 | 8 | 6 | 12 | 14.2 |
| Φ36 | 36.5 | 37.7 | 10 | 6 | 12 | 14.2 |
Dimensional source: 164580 · DIN 127 (B):1987 ↗. “—” means no value listed for this combination. P is thread pitch; min / max are dimensional limits. The selection above is not the full standard or a stock list.
Catalog inquiry range: M4 - M48. Availability, lengths, grades and finishes are confirmed by quotation. Sizes outside the cited reference table require the applicable standard dimensions or an approved drawing. Quote the exact standard and edition; DIN, ISO and U.S. references are not automatically interchangeable.
Applications and selection
Joints whose design explicitly calls for the selected spring-washer form.
Confirm the washer form, inside and outside dimensions, section and material. For critical retention requirements, review the complete fastening system.
Materials, surface finishes and standards
Materials for this series: Carbon Steel, Stainless Steel. Surface finishes: Black Oxide, Zinc Plated, HDG. Compatibility between the grade, finish and operating environment needs to be confirmed.
For titanium, nickel alloy or other non-ferrous requirements, include the exact material grade and drawing. Required mechanical properties, inspection documents and traceability should be stated in the inquiry.
U.S. reference for helical spring-lock washers. The word lock does not guarantee permanent resistance to loosening in every joint. Standards from different systems can vary in dimensions, threads, product scope and test requirements. Confirm the exact designation and edition in the quotation.
Technical reference: ASME washer terminology and scope. Product dimensions and the quoted standard must be confirmed together.
Ordering standard
DIN 127 (B):1987
United States references for a separate inquiry: ASME B18.21.1 (inch). Confirm the exact form, thread system and drawing before quoting.
What to send for a quotation
Start with the size and quantity you need. Include the following details where available; remaining requirements can be confirmed by email.
- Dimensions
- Give the inside diameter, outside diameter and thickness, with tolerances where required.
- Washer form
- Choose flat or split spring washer and identify the standard and edition, or drawing revision.
- Material & acceptance
- State the required material, hardness and finish, plus any inspection requirements.
- Quantity & destination
- Give the quantity for each size and the delivery destination.
Confirmed per order: MOQ, sample arrangements, lead time, supply combinations and inspection documents. A requested delivery date is reviewed during quotation.
Request a quotation →Common questions about spring washers
Does a spring washer guarantee that a joint cannot loosen?
No. The product name alone does not establish performance in a particular joint. The load, vibration, mating surfaces and specified fastening method need to be considered together.
Can I request a size or material outside this listing?
Yes. Send the required dimensions and exact material grade for review. A quotation is needed to confirm feasibility, price and lead time.
