Nuts are commonly used internal threaded mechanical fasteners, typically hexagonal in shape, designed for use with bolts or studs to create a detachable connection. Manufactured from metal or engineering plastics, nuts offer high precision, tensile strength, and vibration resistance. We specialize in producing a wide range of standard and custom nuts for applications across automotive, machinery, construction, energy, electronics, power generation, railways, aerospace, petrochemical, and marine industries.

Nut Type

Nut Material

• Carbon Steel Nuts

Strength grades include 4, 6, 8, 10, and 12.

• Stainless Steel Nuts

Common grades include A2-70, A4-80, 304, 316; corrosion-resistant and high-temperature resistant.

• Non-Ferrous Metal Nuts

Copper, aluminum, titanium, zinc alloy, etc.; lightweight, non-magnetic, electrically conductive.

• Nylon / Plastic Nuts

Materials include PA, PP, PVDF, PEEK; insulating, corrosion-resistant, lightweight.

Nut Manufacturing Process

Step 1: Prepare Raw Materials

• Wire rod (carbon steel, stainless steel, alloy steel);
• Inspection of material and composition.

Step2: Cold Heading or Hot Forging

• Small and Medium-Sized Nuts: Multi-Station Cold Heading Machine
• Large-Sized Nuts: High-Temperature Hot Forging (M24 and above)

Step3: Tapping/Forming Internal Threads

• Cutting Tap
• Forming Tap

Step4: Heat Treatment (High-Strength Nuts)

• Quenching and Tempering
• Quenching + Tempering

Step5: Surface Treatment

• Electrogalvanizing, Dacromet coating, phosphating, hot-dip galvanizing, nickel plating, black oxide coating, chrome plating.
• Corrosion resistance, rust prevention, aesthetic appeal.

Step6: Inspection

• Thread Gauge Inspection
• Torque Testing
• Salt Spray Testing
• Hardness Testing

Our Services

We can produce various types of nuts that meet international standards:

• DIN / ISO / EN
• GB National Standard
• ANSI / ASME American Standard Nuts
• BS British Standard Nuts
• Custom Non-Standard Specifications

Size range:

• Metric nuts: M1.6 – M100
• American nuts: #4 – 4″
• Coarse Thread / Fine Thread
• UNC / UNF Thread
• ISO Thread
• Left-hand threads available upon request

📦 Packaging and Supply Capabilities

• Bagged / Boxed / Barrel-packed
• OEM Labeling
• Export Wooden Crates & Pallets
• Supports Ocean Shipping / Rail Transport / Air Freight

🌍 Our Advantages

✔ In-house cold heading & tapping production lines
✔ Supports third-party inspection
✔ Nut + bolt matching supply
✔ Export experience to multiple countries (Europe/America / Middle East / Southeast Asia / South America)
✔ Custom manufacturing per drawings, fast delivery

📩 Request a Quote

Please send your inquiries, drawings, or specification requests:

Email: info@bdfastener.com
WhatsApp / WeChat: +86 18521523070

👉 Supports PDF, CAD, and 3D drawings
👉 Supports English communication
👉 Quick response