Home » DIN 128B Lock Washer Spring – A2 Stainless

DIN 128B Lock Washer Spring – A2 Stainless

DIN 128B Wavy Spring Lock Washer — A2 Stainless Steel (SUS304), Whitened & Passivated

FULLERKREG DIN 128B wavy spring lock washers are manufactured to DIN 128 Type B standard in A2 stainless steel (SUS304 / 1.4301 / 0Cr18Ni9) with a whitened and passivated surface finish. DIN 128 Type B is a wavy (corrugated) spring washer featuring multiple waves around the ring circumference. The multi-wave profile generates distributed axial spring force with multi-point contact, providing anti-loosening performance while distributing load evenly across the bearing surface. A2 stainless steel provides excellent general corrosion resistance, non-magnetic properties, and food-safe compliance.

Product Highlights

  • Standard: DIN 128 Type B (Wavy Spring Lock Washer)
  • Material: A2 Stainless Steel (SUS304 / 1.4301 / 0Cr18Ni9)
  • Surface Treatment: Whitened & Passivated
  • Size Range: M2 – M36
  • Profile: Type B — Wavy / corrugated (multiple waves, not single curved arc)
  • Function: Multi-wave axial spring force — anti-loosening, distributed load, no surface marking
  • Non-magnetic, non-sparking
  • RoHS & REACH Compliant

Dimensional Specifications — DIN 128 Type B (Wavy), A2 Stainless

All dimensions in millimeters (mm). Per DIN 128 Type B.

Nominal Size For Bolt d1 min d2 max h min h max s (thickness) b (width)
2 M2 2.1 4.4 0.70 1.10 0.6 0.9
2.3 M2.3 2.4 4.9 0.90 1.10 0.6 0.9
2.5 M2.5 2.6 5.1 0.90 1.10 0.6 1.0
2.6 M2.6 2.7 5.2 0.90 1.10 0.6 1.0
3 M3 3.1 6.2 1.10 1.30 0.7 1.3
3.5 M3.5 3.6 6.7 1.20 1.30 0.7 1.3
4 M4 4.1 7.6 1.20 1.40 0.8 1.5
5 M5 5.1 9.2 1.50 1.70 1.0 1.8
6 M6 6.1 11.8 2.00 2.20 1.3 2.5
8 M8 8.1 14.8 2.45 2.75 1.6 3.0
10 M10 10.2 18.1 2.85 3.35 1.8 3.5
12 M12 12.2 21.1 3.35 3.65 2.1 4.0
14 M14 14.2 24.1 3.90 4.30 2.4 4.5
16 M16 16.2 27.4 4.50 5.10 2.8 5.0
18 M18 18.2 26.4 4.50 5.10 2.8 5.0
20 M20 20.2 33.6 5.10 5.90 3.2 6.0
22 M22 22.5 35.9 5.10 5.90 3.2 6.0
24 M24 24.5 40.0 6.50 7.50 4.0 7.0
27 M27 27.5 43.0 6.50 7.50 4.0 7.0
30 M30 30.5 48.2 9.50 10.50 5.0 8.0
36 M36 36.5 58.2 10.30 11.30 6.0 10.0

All dimensions in mm per DIN 128 Type B. s = material thickness; b = ring width; h = free height (wavy profile height). Please verify with your engineering team for critical applications.

DIN 128 Type B vs. Type A — Key Differences

Feature DIN 128 Type B (Wavy) DIN 128 Type A (Curved)
Profile Wavy / corrugated (multiple waves) Single curved arc
Contact points Multi-point contact Continuous curved contact
Spring action Distributed multi-wave spring force Axial spring via single curve
Load distribution Multi-point, more uniform Even, smooth bearing surface
Typical use General bolted assemblies, light loads Cheese head & pan head screws

DIN 128B vs. DIN 127B — Key Differences

Feature DIN 128 Type B (Wavy) DIN 127 Type B (Helical Split)
Profile Wavy corrugated ring Helical split ring
Anti-loosening mechanism Multi-wave spring force only Spring force + bite-in effect
Surface damage Minimal — no sharp edges Marks bearing surface (sharp edges)
Load capacity Light to medium Medium to heavy
Typical use Soft materials, coated surfaces, light assemblies General heavy-duty assemblies

Material & Mechanical Properties — A2 Stainless Steel (SUS304)

Property Value
Material Grade A2 / SUS304 / 1.4301 / 0Cr18Ni9
Cr Content 17.5 – 19.5%
Ni Content 8.0 – 10.5%
Surface Treatment Whitened & Passivated
Magnetic Non-magnetic (austenitic)
Operating Temperature -196°C to +300°C
Corrosion Resistance Excellent — atmospheric, fresh water, mild chemicals
RoHS / REACH Compliant

Application Scenarios

  • General bolted assemblies — light to medium load anti-loosening without surface damage
  • Soft material assemblies — aluminum, plastic, coated surfaces where sharp edges must be avoided
  • Food & beverage processing equipment — A2 stainless, food-safe, easy to clean
  • Medical & pharmaceutical equipment — non-magnetic, corrosion-free
  • Electronics & precision instruments — non-magnetic, no surface marking
  • Outdoor & architectural hardware — excellent atmospheric corrosion resistance
  • Plumbing & HVAC systems — fresh water and mild chemical resistance

Product Photo Gallery

FULLERKREG DIN 128B Wavy Spring Lock Washer, A2 Stainless Steel:

[ Photo 1 ] [ Photo 2 ] [ Photo 3 ] [ Photo 4 ]

Why Choose FULLERKREG?

  • 🏭 Direct manufacturer — factory in China, no middlemen
  • 📐 Strict DIN dimensional control — 100% inspection on critical dimensions
  • 🌍 Global export experience — serving distributors in Europe, North America, Southeast Asia
  • 📦 Flexible MOQ — small trial orders and large bulk shipments both welcome
  • 📋 Full documentation — material certs, RoHS declarations, test reports available
  • ⚡ Fast lead times — standard sizes in stock, ready to ship

Frequently Asked Questions

Q: What is DIN 128 Type B?
A: DIN 128 Type B is a wavy (corrugated) spring lock washer. The ring has multiple waves around its circumference, generating distributed axial spring force with multi-point contact. Unlike DIN 127B (helical split with sharp edges), DIN 128B has no sharp edges and does not mark bearing surfaces.

Q: What is the difference between DIN 128A and DIN 128B?
A: DIN 128A is curved (single arc), DIN 128B is wavy (multiple corrugations). Both share the same dimensions but differ in profile. Type B provides more distributed multi-point contact; Type A provides a single smooth curved contact.

Q: When to use DIN 128B vs. DIN 127B?
A: Use DIN 128B when surface marking must be avoided (soft materials, coated surfaces, anodized aluminum). Use DIN 127B for heavier loads where the bite-in effect is needed for stronger anti-loosening performance.

Q: Is A2 stainless steel food-safe?
A: Yes. A2 (SUS304) is widely used in food processing and pharmaceutical equipment. Non-toxic, easy to clean, resistant to most food-contact environments.

Q: Do you provide material test certificates?
A: Yes. Mill certificates, chemical composition reports, and dimensional inspection reports are available upon request.

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