冷間圧造加工は、切削の少ない、あるいは切削を必要としない新しい圧造加工のひとつである。
金属。の作用による金属の塑性変形を利用した加工法である。
外力を受け、金型の助けを借りて、金属の体積を再分配し、移動させる。
必要な部品やブランクを製造します。冷間圧造工程は、標準的な
ボルト、ネジ、ナット、リベット、ピンなどの留め具。
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
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Locking Mechanism: Typically features a nylon insert (nyloc nut), deformed threads, or a metal locking collar to prevent self-loosening.
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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
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Purpose: Enhances corrosion resistance and provides an aesthetic black finish.
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Common Coatings:
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Black Oxide: Offers moderate corrosion resistance and a matte black finish.
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Zinc Plating (Black): Provides better corrosion protection with a black chromate finish.
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Phosphate Coating: Often used for lubrication and mild corrosion resistance.
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Dacromet/Geomet: Advanced corrosion-resistant coatings with a dark gray/black hue.
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Powder Coating/Paint: Used for decorative or heavy-duty environmental protection.
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3. Material & Strength
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Base Metal: Typically steel (grade 8, 10, or 12), stainless steel (A2/A4), or brass.
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Strength Class: Markings (e.g., 8, 10, or 12) indicate tensile strength.
4. Applications
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Automotive & Aerospace: Vibration-prone environments.
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Machinery & Industrial Equipment: Where secure fastening is critical.
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Outdoor/Marine Use: Black-coated nuts resist weathering.
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Aesthetic Applications: Black-coated nuts are used in visible assemblies (e.g., furniture, electronics).
- Toothed nut black plating
5. Standards & Certifications
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DIN, ISO, ASTM, or SAE compliance ensures quality and performance.
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RoHS/REACH compliant if used in regulated industries.
- Toothed nut black plating
6. Advantages
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Vibration Resistance: Prevents loosening.
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Corrosion Protection: Black coating adds durability.
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Aesthetic Appeal: Uniform black finish for a professional look.
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