Home » DIN 6796 Conical Spring Washers – A2 Stainless

DIN 6796 Conical Spring Washers – A2 Stainless

DIN 6796 Conical Spring Washers — A2 Stainless Steel (SUS304), Whitened & Passivated

FULLERKREG DIN 6796 conical spring washers are manufactured to DIN 6796 standard in A2 stainless steel (SUS304 / 1.4301 / 0Cr18Ni9), whitened and passivated. DIN 6796 conical spring washers (also known as Belleville washers or disc spring lock washers) are specifically designed for use in bolted assemblies to prevent loosening under vibration and dynamic loads. Unlike split ring lock washers, DIN 6796 conical spring washers work by maintaining a continuous spring force against the bolt head or nut — the conical shape flattens under bolt preload, storing elastic energy that compensates for relaxation, creep, and thermal cycling in the joint. They are designed for use with bolts of property class 8.8 to 10.9 and are suitable for heavy vibration, engine, turbine, generator, and structural applications. A2 stainless steel provides excellent corrosion resistance for outdoor and marine-adjacent applications.

Product Highlights

  • Standard: DIN 6796 (Conical Spring Washer for Bolt Assemblies)
  • Material: A2 Stainless Steel (SUS304 / 1.4301 / 0Cr18Ni9)
  • Surface Treatment: Whitened & Passivated
  • Size Range: M2 – M30
  • Property class compatibility: 8.8 – 10.9
  • Working principle: Conical spring force — maintains bolt preload under vibration, relaxation, and thermal cycling
  • Also known as: Belleville washer, disc spring lock washer, conical washer
  • Stacking: Same direction = double/triple load capacity; opposite direction = greater deflection & shock absorption
  • Reusable — as long as not deformed or damaged
  • Non-magnetic, corrosion-resistant
  • RoHS & REACH Compliant

Dimensional Specifications — DIN 6796, A2 Stainless Steel

All dimensions in millimeters (mm). Per DIN 6796.

Thread D D1 min D1 max D2 min D2 max H min H max S (ref) Flat load area mm²
M2 2.20 2.40 5 — 0.50 0.60 0.40 —
M2.5 2.70 2.90 6 — 0.61 0.72 0.50 —
M3 3.20 3.40 7 — 0.72 0.85 0.60 —
M3.5 3.70 3.90 8 — 0.94 1.06 0.80 —
M4 4.30 4.50 9 — 1.11 1.30 1.00 —
M5 5.30 5.50 11 — 1.30 1.50 1.20 —
M6 6.40 6.60 14 — 1.70 2.00 1.50 —
M7 7.40 7.60 17 — 2.00 2.00 1.75 —
M8 8.40 8.60 18 — 1.40 2.80 2.00 —
M10 10.50 10.80 23 — 2.20 3.29 2.50 —
M12 13.00 13.50 28 — 2.50 3.50 3.00 —
M14 15.00 15.50 33 — 3.04 4.05 3.50 —
M16 17.00 17.50 38 — 3.51 4.51 4.00 —
M18 19.00 19.50 42 — 3.09 5.60 4.50 —
M20 21.00 21.50 45 — 5.00 6.40 5.00 —
M22 23.00 23.50 50 — 5.55 6.55 5.50 —
M24 25.00 25.50 56 — 6.15 7.75 6.00 —
M27 28.00 28.50 60 — 6.77 7.75 6.50 —
M30 31.00 31.50 70 — 8.00 9.30 7.00 —

All dimensions in mm per DIN 6796. D1 = inner diameter; D2 = outer diameter; H = free height (conical); S = material thickness. Washer flattens under bolt preload to store spring energy.

How DIN 6796 Conical Spring Washers Work

  • Conical spring action: The washer is conical (dished) in its free state. When the bolt is tightened, the cone flattens, storing elastic spring energy in the washer
  • Continuous preload maintenance: The stored spring force continuously pushes against the bolt head/nut, compensating for joint relaxation, creep, and thermal cycling — maintaining bolt preload over time
  • Vibration resistance: Unlike split ring washers that rely on sharp edges, DIN 6796 washers maintain a continuous spring force — far more effective under sustained vibration
  • Stacking — same direction: Stack multiple washers in the same direction to multiply load capacity (spring forces add in series)
  • Stacking — opposite direction: Stack in opposite directions to increase deflection range and shock/vibration absorption capacity
  • Reusability: Washers can be reused indefinitely as long as they are not deformed beyond their elastic limit or otherwise damaged

DIN 6796 vs. DIN 127 Split Ring Lock Washer — Key Differences

Feature DIN 6796 (Conical Spring) DIN 127 (Split Ring)
Working principle Continuous spring force — maintains preload Sharp edges bite into surfaces
Vibration resistance Superior — spring force maintained under vibration Limited — edges can embed and lose effect
Load capacity High — stackable for increased load Standard
Reusability Yes — if not deformed Limited
Surface damage Minimal — no sharp edges Marks mating surfaces
Best for Heavy vibration, engines, turbines, structural General light-duty anti-loosening

Material 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
Property class compatibility 8.8 – 10.9
RoHS / REACH Compliant

Application Scenarios

  • Engines & turbines — high-vibration bolted connections requiring sustained preload maintenance
  • Generators & compressors — heavy-duty equipment subject to continuous vibration
  • Structural steelwork — bolted connections subject to dynamic loads and thermal cycling
  • Marine & offshore equipment — A2 stainless for corrosion resistance in salt air environments
  • Automotive & transportation — chassis and drivetrain connections under vibration
  • Food & chemical processing — non-magnetic, corrosion-resistant stainless steel
  • General heavy-duty bolted assemblies — wherever sustained anti-loosening performance is required

Product Photo Gallery

FULLERKREG DIN 6796 Conical Spring Washers, 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 D1, D2, H, S and spring characteristics
  • 🌍 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 available
  • ⚡ Fast lead times — standard sizes in stock, ready to ship

Frequently Asked Questions

Q: What is a DIN 6796 conical spring washer?
A: DIN 6796 specifies conical spring washers (Belleville washers) for bolt assemblies. The conical shape flattens under bolt preload, storing spring energy that maintains clamping force under vibration, relaxation, and thermal cycling. Designed for use with property class 8.8–10.9 bolts.

Q: How is DIN 6796 different from a split ring lock washer (DIN 127)?
A: DIN 6796 works by continuous spring force — far more effective under sustained vibration than split ring washers which rely on sharp edges that can embed and lose effectiveness. DIN 6796 is preferred for heavy-duty applications: engines, turbines, generators, and structural connections.

Q: Can DIN 6796 washers be stacked?
A: Yes. Stack in the same direction to multiply load capacity. Stack in opposite directions to increase deflection range and shock/vibration absorption. Multiple stacking configurations allow the washer system to be tuned to specific load and deflection requirements.

Q: Are DIN 6796 washers reusable?
A: Yes, as long as the washer has not been deformed beyond its elastic limit or otherwise damaged. Inspect for deformation before reuse in critical applications.

Q: Do you provide material test certificates?
A: Yes. Mill certificates and RoHS declarations available upon request.

FULLERKREG Fasteners — Precision DIN Standard Fasteners, Direct from Manufacturer.
For wholesale inquiries, technical questions, or custom orders, please contact our sales team.

Sorry, this collection is empty.
Continue shopping