Products

Hex Flange Nut – Integrated Washer Design for Anti-Loosening

The Hex Flange Nut (Hexagon Flange Nut) is a high-performance fastener that combines a standard hex nut with an integral circular flange. This one-piece design eliminates the need for a separate flat washer, spreads the clamping load over a larger bearing surface, and—when serrated—provides exceptional resistance to loosening under vibration. At Malaxy, we manufacture hex flange nuts in a full range of materials, strength grades, and surface finishes to meet the demanding requirements of automotive, heavy machinery, and structural applications.

✔ Integrated flange replaces separate washer – reduces parts and assembly time
✔ Serrated flange available for positive locking under vibration
*✔ Available from M5 to M20 (metric) and #10 to 5/8″ (inch)*
*✔ Strength classes up to 12 (metric) / Grade 8 (inch)*

Key Features & Advantages

• Built-in Washer Function – The wide flange distributes clamping force evenly, preventing damage to the workpiece and eliminating the need for loose washers, which is especially beneficial in automated assembly lines and confined spaces.

• Vibration Resistance – Serrated flange (tooth type) digs into the mating surface, creating a mechanical lock that resists loosening from shock and vibration. This is critical for engines, chassis, and moving machinery.

• Self-Centering – The flange’s flat and concentric design helps center the nut on oversized holes, simplifying alignment during installation.

• Space Saving – Lower profile than a standard hex nut plus a separate washer, allowing use in tight assemblies.

• Reduced Parts Inventory – One component replaces a nut + washer, lowering total cost of ownership for large-scale assembly and maintenance.

Material & Grade Options

Surface Finishes Available:

• Zinc plating (blue, yellow, black) – standard corrosion protection

• Hot-dip galvanizing – heavy-duty outdoor use

• Dacromet® / Geomet® – high salt spray resistance (up to 1000h)

• Black oxide + oil – minimal thickness, decorative

• Phosphate & oil – temporary rust protection

⚙️ Quality Standards & Certifications

Our hex flange nuts are manufactured and tested in compliance with:

• DIN 6923 – Hexagon flange nuts with serrated or plain flange

• ISO 4161 – Hexagon flange nuts – coarse thread

• GB/T 6177.1 / 6177.2 – Chinese national standards

• ASME B18.6.3 – American standard for hex flange nuts (inch series)

• IFI 111 – Industrial Fasteners Institute standard

• RoHS, REACH – Environmental compliance

Quality Control Includes:
✔ 100% thread gauging (on critical orders)
✔ Proof load testing
✔ Hardness (HRC or HV)
✔ Salt spray test for coating verification
✔ Dimensional inspection per standard drawings

Industry Applications

• Automotive – Engine blocks, transmission housings, suspension arms, brake calipers, exhaust system flanges

• Heavy Machinery – Hydraulic cylinder mounts, bulldozer track assemblies, excavator pivot points

• Construction Equipment – Scaffolding connections, tower crane bolts, steel structure joints

• Agricultural Machinery – Tractor chassis, harvester blades, tillage equipment

• Energy Sector – Solar panel mounting frames, wind turbine tower flanges, power distribution cabinets

• General Industrial – Conveyor systems, packaging machinery, furniture assembly (decorative flange)

OEM & Customization Services

As a leading fastener manufacturer based in Shanghai, Malaxy offers comprehensive customization for hex flange nuts:

• Custom thread sizes – Fine pitch (e.g., M10×1.25), left-hand thread, UNF, UNJC

• Flange design – Serrated (toothed), smooth, or extra-large diameter

• Non-standard heights – Lower profile or taller for special applications

• Special coatings – Xylan®, Teflon®, PTFE, zinc-nickel alloy

• Packaging – Bulk in cartons, small poly bags, boxes with labels, or custom kitting

Our strategic location at Shanghai port ensures fast, economical shipping worldwide with full batch traceability.

✅ Request a quote for Hex Flange Nut today – Standard sizes in stock, custom orders delivered in 2–4 weeks!