Toothed nut black plating

冷镦加工是一种少切削或无切削的压力加工新工艺
金屬。它是一種利用金屬在下列因素作用下產生塑性變形的加工方法
外力作用下，在模具的幫助下，重新分配和轉移金屬的體積，以形成
所需的零件或坯料。冷镦工艺最适合生产标准的
螺栓、螺絲、螺帽、鉚釘和銷等緊固件

A safety thread nut with a black coating is a specialized fastener designed to resist loosening under vibration or torque while also providing corrosion resistance and a sleek, dark appearance. Here’s a general description of its features:

1. Safety Thread Design

• Locking Mechanism: Typically features a nylon insert (nyloc nut), deformed threads, or a metal locking collar to prevent self-loosening.

• Reusable or One-Time Use: Some (like nylon insert nuts) can be reused, while others (like crimped-top nuts) are single-use.

2. Black Coating

• Purpose: Enhances corrosion resistance and provides an aesthetic black finish.

• Common Coatings:

  • Black Oxide: Offers moderate corrosion resistance and a matte black finish.

  • Zinc Plating (Black): Provides better corrosion protection with a black chromate finish.

  • Phosphate Coating: Often used for lubrication and mild corrosion resistance.

  • Dacromet/Geomet: Advanced corrosion-resistant coatings with a dark gray/black hue.

  • Powder Coating/Paint: Used for decorative or heavy-duty environmental protection.

3. Material & Strength

• Base Metal: Typically steel (grade 8, 10, or 12), stainless steel (A2/A4), or brass.

• Strength Class: Markings (e.g., 8, 10, or 12) indicate tensile strength.

4. Applications

• Automotive & Aerospace: Vibration-prone environments.

• Machinery & Industrial Equipment: Where secure fastening is critical.

• Outdoor/Marine Use: Black-coated nuts resist weathering.

• Aesthetic Applications: Black-coated nuts are used in visible assemblies (e.g., furniture, electronics).

• Toothed nut black plating

5. Standards & Certifications

• DIN, ISO, ASTM, or SAE compliance ensures quality and performance.

• RoHS/REACH compliant if used in regulated industries.

• Toothed nut black plating

6. Advantages

• Vibration Resistance: Prevents loosening.

• Corrosion Protection: Black coating adds durability.

• Aesthetic Appeal: Uniform black finish for a professional look.