O processo de encabeçamento a frio é um dos novos processos para a maquinagem sob pressão com menos ou nenhum corte
metal. É um método de processamento que utiliza a deformação plástica do metal sob a ação de
forças externas e, com a ajuda de moldes, redistribui e transfere o volume de metal para formar
as peças ou os espaços em branco necessários. O processo de encabeçamento a frio é o mais adequado para a produção de
elementos de fixação, tais como cavilhas, parafusos, porcas, rebites, cavilhas, etc.
Oil Plug Screw with Red Hole – Overview
An oil plug screw with a red hole is a specialized drain plug designed for easy visual inspection of oil flow or leakage, often used in automotive, industrial, or high-performance applications. The red hole (or colored indicator) serves as a quick-check feature to confirm proper sealing or detect oil seepage.
Key Features & Functions
1. Red Hole Design
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Purpose: Acts as a visual indicator for oil presence or leaks.
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Como funciona:
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If oil is visible in the hole, it may indicate a seal failure or residual oil after a change.
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In some designs, the hole helps vent air during oil drainage.
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Alternative Colors: Some plugs use green, blue, or yellow for different applications.
2. Material & Construction
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Metal: Typically steel, aluminum, or brass with corrosion-resistant coatings.
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Thread Type: Matches standard sizes (e.g., M12x1.25, M14x1.5).
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Magnetic Option: Some versions include a magnetic tip to capture metal debris.
3. Head & Drive Types
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Hex Head (6mm–17mm): Standard for wrench/socket use.
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Allen Key Drive: Low-profile, common in performance vehicles.
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Washer/Seal: Often includes a copper or aluminum crush washer for a tight seal.
4. Applications
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Performance Engines: Allows quick leak checks in race cars or modified engines.
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Industrial Machinery: Used in hydraulic systems or gearboxes for easy inspection.
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Motorcycles/ATVs: Compact designs with visual indicators for maintenance.
Benefits of a Red Hole Oil Plug
✔ Quick Leak Detection – Visual warning of seal failure.
✔ Improved Drainage – Some designs reduce oil “glugging” during changes.
Installation Notes
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Torque Specs: Follow manufacturer guidelines (typically 18–25 ft-lbs for cars).
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Seal Replacement: Always use a new crush washer to prevent leaks.
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Inspection: Periodically check the hole for oil residue.
Variations & Related Products
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“Tattle-Tale” Plugs: Have a small hole that weeps oil if loose.
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Vented Drain Plugs: Use the hole for air escape during draining.
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Color-Coded Plugs: Different colors for oil, transmission, or differential fluids.
Who Should Use It?
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Mechanics who want a quick visual check for leaks.
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Racers/Enthusiasts monitoring high-stress engines.
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Industrial Users needing easy maintenance checks.
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