Oil plug screw with hole red

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

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

• Purpose: Acts as a visual indicator for oil presence or leaks.

• 如何運作：

  • If oil is visible in the hole, it may indicate a seal failure or residual oil after a change.

  • In some designs, the hole helps vent air during oil drainage.

• Alternative Colors: Some plugs use green, blue, or yellow for different applications.

2. Material & Construction

• Metal: Typically steel, aluminum, or brass with corrosion-resistant coatings.

• Thread Type: Matches standard sizes (e.g., M12x1.25, M14x1.5).

• Magnetic Option: Some versions include a magnetic tip to capture metal debris.

3. Head & Drive Types

• Hex Head (6mm–17mm): Standard for wrench/socket use.

• Allen Key Drive: Low-profile, common in performance vehicles.

• Washer/Seal: Often includes a copper or aluminum crush washer for a tight seal.

4. Applications

• Performance Engines: Allows quick leak checks in race cars or modified engines.

• Industrial Machinery: Used in hydraulic systems or gearboxes for easy inspection.

• 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

• Torque Specs: Follow manufacturer guidelines (typically 18–25 ft-lbs for cars).

• Seal Replacement: Always use a new crush washer to prevent leaks.

• Inspection: Periodically check the hole for oil residue.

Variations & Related Products

• “Tattle-Tale” Plugs: Have a small hole that weeps oil if loose.

• Vented Drain Plugs: Use the hole for air escape during draining.

• Color-Coded Plugs: Different colors for oil, transmission, or differential fluids.

Who Should Use It?

• Mechanics who want a quick visual check for leaks.

• Racers/Enthusiasts monitoring high-stress engines.

• Industrial Users needing easy maintenance checks.