DIN 6798 Serrated Lock Washer — Complete Product Series

FULLERKREG DIN 6798 serrated lock washers are manufactured to DIN 6798 standard in two serration types and a full range of materials and surface treatments. Form A (external serrated) features teeth on the outer diameter that bite into the substrate surface, providing maximum anti-loosening torque. Form J (internal serrated) features teeth on the inner diameter that bite into the fastener shank, preserving the outer substrate surface. Both types provide positive mechanical anti-loosening performance under vibration and dynamic loads. Select the form, material, and finish that matches your application below.

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Product Variants — Browse by Form, Material & Finish

DIN 6798A External Serrated — A2 Stainless Steel (SUS304), Whitened & Passivated
A2 stainless steel (SUS304) · Whitened & passivated · M3–M30 · External teeth · Non-magnetic · General corrosion resistance · Food-safe

DIN 6798A External Serrated — A4 Marine Stainless Steel (SUS316), Whitened & Passivated
A4 stainless steel (SUS316) · Whitened & passivated · M3–M30 · External teeth · Mo 2–3% · Marine-grade · Superior chloride & seawater resistance

DIN 6798A External Serrated — 65Mn Spring Steel, Zinc CR3
65Mn spring steel (GB/T 1222) · Zinc CR3 electroplating · M3–M30 · External teeth · 430–510 HV · ≥72h NSS · RoHS compliant · Maximum anti-loosening torque

DIN 6798J Internal Serrated — A2 Stainless Steel (SUS304), Whitened & Passivated
A2 stainless steel (SUS304) · Whitened & passivated · M3–M30 · Internal teeth · Non-magnetic · Outer surface preserved · Food-safe

DIN 6798J Internal Serrated — 65Mn Spring Steel, Zinc CR3
65Mn spring steel (GB/T 1222) · Zinc CR3 electroplating · M3–M30 · Internal teeth · 430–510 HV · ≥72h NSS · RoHS compliant · Outer surface preserved

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How to Choose the Right Type

Requirement	Recommended Form
Maximum anti-loosening performance	Form A (External) — teeth at largest radius
Outer substrate surface must be preserved	Form J (Internal) — teeth bite into fastener
Marine, offshore, seawater environment	A4 Stainless Steel (SUS316)
General outdoor, food processing, fresh water	A2 Stainless Steel (SUS304)
Heavy industrial, outdoor or humid, high hardness	65Mn Steel, Zinc CR3
RoHS-compliant zinc finish required	65Mn Steel, Zinc CR3 (no Cr6+)

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Form A vs. Form J — Key Differences

Feature	Form A (External Serrated)	Form J (Internal Serrated)
Serration location	Outer diameter	Inner diameter
Bites into	Substrate surface (under bolt head / nut)	Fastener shank / bolt head underside
Outer surface	Marked by teeth	Preserved — no marking
Anti-loosening torque	Maximum — largest tooth radius	Standard
Best for	General industrial assemblies	Visible or finished surfaces

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DIN 6798 Standard Overview

• Standard: DIN 6798
• Forms: Form A (External Serrated) · Form J (Internal Serrated) · Form V (Countersunk)
• Size range: M3 – M30
• Anti-loosening mechanism: Mechanical tooth engagement — resists rotation under vibration and dynamic loads
• All grades RoHS & REACH compliant

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Product Photo Gallery

FULLERKREG DIN 6798 Serrated Lock Washers — product range overview:

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Why Choose FULLERKREG?

• 🏭 Direct manufacturer — factory in China, no middlemen
• 📐 Strict DIN dimensional control — 100% inspection on critical dimensions and hardness
• 🌍 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, hardness reports, RoHS declarations on request
• ⚡ Fast lead times — standard sizes in stock, ready to ship

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