LOCK HEX NUTS – DIN 439

🔩 Low-Profile Hex Jam Nuts for Locking Applications

DIN 439 Lock Hex Nuts are thin, low-height hexagonal nuts designed to act as locking nuts when used alongside a standard hex nut. Commonly referred to as jam nuts, they prevent loosening under vibration or dynamic loads by providing a locking effect through double-nut tightening.

At National Fasteners, we manufacture DIN 439 lock nuts with precision threading and robust material options for reliable performance in mechanical, automotive, and equipment assembly applications. These nuts are ideal where space is limited or where a secondary locking nut is required.

🔧 Product Specifications:

• Standard: DIN 439 (Parts 1 & 2 – with/without chamfer)

• Size Range: M1.6 to Mm2

• Thread Type: Metric Coarse (Fine thread available on request)

• Thread Tolerance: 6H

• Material Options:

  • Low Carbon Steel

  • Alloy Steel

Surface Finishes:

• Zinc Plated (Clear / Yellow)

• Black Oxide

• Self-Color (Plain)

• Phosphate Coated

• Hot Dip Galvanized

• Custom coatings available

⚙️ Key Features of DIN 439 Lock Hex Nuts:

• Thin (jam) nut design for secondary locking support

• Prevents unintentional loosening of fasteners under load

• Ideal for tight or confined installations

• Compatible with standard hex nuts and bolts

• Available in corrosion-resistant finishes and various grades

🔩 Common Applications:

• Automotive engines and assemblies

• Mechanical equipment and machine tools

• Vibration-prone environments

• Electrical panels and enclosures

• Furniture hardware and light frameworks

• Industrial assemblies where space is restricted

💡 Why Choose Us for DIN 439 Lock Hex Nuts?

✅ ISO 9001:2015 Certified Manufacturer
🧪 In-House Dimensional & Material Testing
⚙️ Custom Sizes, Threads & Packaging on Demand
🏭 Bulk Supply with Short Lead Times
🌍 Trusted Supplier to Domestic & Global Customers

📞 Request a Quote or Sample

Need high-quality DIN 439 lock hex nuts for your application?
Get in touch with us for specifications, pricing, or sample requests.

👉 Request a Quote | 📧 sales@nationalfasteners.in | 📞 +91 70093-08799