Castle Nuts (DIN 935) – Hexagon Slotted & Castle Nuts

FULLERKREG supplies a complete range of DIN 935 Hexagon Slotted Castle Nuts across multiple materials, surface treatments, and strength classes. Manufactured to DIN 935 / ISO 7035 standards, these castle nuts are designed for use with cotter pins or split pins to provide positive mechanical locking in vibration-prone and safety-critical assemblies. Available in stainless steel A2 / A4 and zinc-plated carbon steel Class 8 / Class 10, covering sizes M5 through M52 for industrial, marine, automotive, and heavy machinery applications.

Product Series – DIN 935 Castle Nuts

Castle Nuts (DIN 935) – Stainless Steel A2 (SUS304)
Material: SUS304 (A2 / 1.4301)  ·  Surface: Passivated  ·  Size: M5–M30  ·  Class: A2-70

Castle Nuts (DIN 935) – Marine Stainless Steel A4 (SUS316)
Material: SUS316 (A4 / 1.4401)  ·  Surface: Passivated  ·  Size: M5–M30  ·  Class: A4-70

DIN 935 Class 8 Zinc Finish Steel Slotted Hex Nut
Material: 35K Carbon Steel  ·  Surface: Zinc Cr3  ·  Size: M5–M52  ·  Class: 8

DIN 935 Class 10 Slotted Castle Nuts Steel Zinc Plated
Material: 35K Carbon Steel  ·  Surface: Zinc Cr3  ·  Size: M5–M52  ·  Class: 10

Selection Guide – Choose the Right DIN 935 Castle Nut

Grade / Series	Material	Surface	Size Range	Strength Class	Best For
A2 Stainless	SUS304 / 1.4301	Passivated	M5–M30	A2-70	General corrosion resistance, food & outdoor use
A4 Marine	SUS316 / 1.4401	Passivated	M5–M30	A4-70	Marine, offshore, chemical & coastal environments
Class 8 Zinc	35K Carbon Steel	Zinc Cr3	M5–M52	Class 8	General industrial, automotive, construction
Class 10 Zinc	35K Carbon Steel	Zinc Cr3	M5–M52	Class 10	Heavy machinery, mining, axle systems, high-torque

About DIN 935 Standard

DIN 935 specifies hexagon slotted and castle nuts for metric bolts and screws. The standard is harmonized with ISO 7035 and recognized globally by DIN (Deutsches Institut für Normung). Castle nuts feature slots (castellations) cut into the top face, allowing a cotter pin or split pin to pass through a drilled bolt shank, providing a positive mechanical lock that prevents loosening under vibration and dynamic loads.

• DIN 935 – Hexagon slotted and castle nuts (metric)
• ISO 7035 – Prevailing torque type hexagon nuts (slotted)
• ISO 3506-2 – Mechanical properties of stainless steel fasteners (nuts)
• ISO 898-2 – Mechanical properties of carbon steel nuts

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Why Choose FULLERKREG?

• 🏭 Direct Manufacturer – Factory-direct pricing with no middlemen
• 📐 DIN/ISO Precision – Full dimensional compliance to international standards
• 🔬 Material Certified – EN 10204 3.1 mill certificates & test reports available
• 🌍 Global Shipping – Reliable export logistics to worldwide destinations
• 📦 Flexible MOQ – Wholesale bulk orders and sample orders welcome
• ⚙️ Full Grade Range – A2 / A4 stainless and Class 8 / Class 10 carbon steel in one source
• ✅ RoHS Compliant – Zinc Cr3 coating meets environmental regulations
• 💬 Technical Support – Engineering assistance for material and grade selection