Home » DIN 6797J -A2 SS Internal Shakeproof

DIN 6797J -A2 SS Internal Shakeproof

DIN 6797J Internal Tooth Lock Washer (Shakeproof) — A2 Stainless Steel (SUS304), Whitened & Passivated

FULLERKREG DIN 6797J internal tooth lock washers are manufactured to DIN 6797 Form J standard in A2 stainless steel (SUS304 / 1.4301 / 0Cr18Ni9) with a whitened and passivated surface finish. DIN 6797 Form J features internal teeth (on the inner diameter) with a deeper, more aggressive tooth profile than DIN 6798J, providing stronger mechanical anti-loosening engagement. The internal tooth design bites into the fastener shank or bolt head bearing surface while preserving the outer substrate surface — ideal for visible or finished assemblies. Also known as shakeproof washers, DIN 6797 washers are widely specified in electrical, automotive, and precision mechanical applications. A2 stainless steel provides excellent general corrosion resistance, non-magnetic properties, and food-safe compliance.

Product Highlights

  • Standard: DIN 6797 Form J (Internal Tooth Lock Washer / Shakeproof)
  • Material: A2 Stainless Steel (SUS304 / 1.4301 / 0Cr18Ni9)
  • Surface Treatment: Whitened & Passivated
  • Size Range: M3 – M30
  • Tooth type: Internal (teeth on inner diameter — deeper profile than DIN 6798J)
  • Anti-loosening mechanism: Deep tooth mechanical engagement — stronger than DIN 6798J
  • Outer surface preserved — no marking on substrate outer surface
  • Non-magnetic, non-sparking
  • RoHS & REACH Compliant

Dimensional Specifications — DIN 6797 Form J (Internal Tooth), A2 Stainless

All dimensions in millimeters (mm). Per DIN 6797 Form J.

For Thread d1 min d1 max d2 max No. of Teeth s min s max kg/1000pcs
M3 3.2 3.5 7.0 12 0.4 0.6 0.07
M3.5 3.7 4.0 8.0 12 0.4 0.6 0.1
M4 4.3 4.6 9.0 16 0.5 0.7 0.15
M5 5.3 5.6 10.0 16 0.5 0.7 0.18
M6 6.4 6.8 12.0 20 0.6 0.8 0.28
M7 7.4 7.8 14.0 20 0.6 0.8 0.42
M8 8.4 8.8 16.0 20 0.8 1.0 0.7
M10 10.5 11.0 20.0 24 0.8 1.0 1.1
M12 13.0 13.5 24.0 24 1.0 1.3 2.0
M14 15.0 15.5 27.0 24 1.0 1.3 2.6
M16 17.0 17.5 30.0 24 1.2 1.5 3.8
M18 19.0 19.5 34.0 28 1.2 1.5 5.1
M20 21.0 21.5 37.0 28 1.2 1.5 6.1
M22 23.0 23.5 39.0 28 1.5 1.8 7.5
M24 25.0 25.5 44.0 28 1.5 1.8 10.0
M27 28.0 28.5 50.0 32 1.5 1.8 14.0
M30 31.0 31.5 56.0 32 1.5 1.8 19.0

All dimensions in mm per DIN 6797 Form J. d1 = inner diameter; d2 = outer diameter; s = thickness. Tooth count increases with size for consistent engagement.

DIN 6797 vs. DIN 6798 — Key Differences

Feature DIN 6797 (Shakeproof) DIN 6798 (Serrated)
Tooth profile Deeper, more aggressive Shallower, standard serration
Anti-loosening strength Stronger — higher bite-in force Standard
Surface marking More pronounced Standard
Typical use Electrical, automotive, high-vibration General industrial assemblies
Common name Shakeproof washer Serrated lock washer

DIN 6797 Form J vs. Form A — Key Differences

Feature Form J (Internal) — This Product Form A (External)
Tooth location Inner diameter Outer diameter
Bites into Fastener shank / bolt head Substrate surface
Outer surface Preserved — no marking Marked by teeth
Best for Visible / finished surfaces Maximum anti-loosening torque

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

  • Electrical & electronics assemblies — shakeproof design widely specified in electrical equipment
  • Automotive manufacturing — body, chassis, and electrical system assemblies
  • Visible or finished surfaces — internal teeth preserve outer substrate appearance
  • Food & beverage processing equipment — A2 stainless, food-safe, easy to clean
  • Medical & pharmaceutical equipment — non-magnetic, corrosion-free
  • High-vibration industrial equipment — deeper tooth profile for stronger anti-loosening
  • Outdoor & architectural hardware — excellent atmospheric corrosion resistance

Product Photo Gallery

FULLERKREG DIN 6797J Internal Tooth 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 6797 Form J?
A: DIN 6797 Form J is an internal tooth lock washer (shakeproof washer). The teeth are on the inner diameter with a deeper, more aggressive profile than DIN 6798J. They bite into the fastener shank or bolt head underside when tightened, providing strong mechanical anti-loosening without marking the outer substrate surface.

Q: What is the difference between DIN 6797 and DIN 6798?
A: DIN 6797 (shakeproof) has a deeper, more aggressive tooth profile providing stronger anti-loosening engagement. DIN 6798 (serrated) has a shallower standard serration for general industrial use. Both are available in Form A (external) and Form J (internal).

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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