Stainless steel hexagon oil plug screw

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Stainless Steel Hexagon Oil Plug Screw – Detailed Description

A stainless steel hexagon oil plug screw is a precision-engineered fastener designed to securely seal oil drain ports in engines, gearboxes, hydraulic systems, and industrial machinery. Its corrosion-resistant construction and hexagonal head design ensure durability, easy installation, and leak-proof performance.

Key Features & Specifications

1. Material & Finish

• Stainless Steel Grade: Typically A2 (304) or A4 (316) for superior corrosion resistance against oil, water, and chemicals.

• Surface Finish: Polished, brushed, or natural mill finish to prevent galling and ensure smooth threading.

2. Head Design

• Hexagonal (Hex) Head: Allows tightening/loosening with a wrench, socket, or Allen key (depending on design).

  • Common sizes: 10mm, 12mm, 14mm, 17mm (automotive), or custom industrial sizes.

• Flanged Variants: Some models include an integrated washer flange for better sealing without a separate crush washer.

3. Thread Type & Size

• Metric Threads (e.g., M12x1.5, M14x1.5, M18x1.5) – Common in automotive and machinery.

• NPT (National Pipe Taper) Threads – Used in hydraulic and industrial systems for a pressure-tight seal.

• BSP (British Standard Pipe) Threads – Found in European and Asian machinery.

4. Sealing Mechanism

• Crush Washer (Copper/Aluminum): Ensures a leak-proof seal when torqued.

• Integrated O-Ring/Gasket: Some models feature a built-in rubber or silicone seal.

• Magnetic Tip (Optional): Captures metal debris for engine protection.

5. Applications

• Automotive: Engine oil pans, transmissions, differentials.

• Industrial: Hydraulic systems, gearboxes, compressors.

• Marine: Boat engines and machinery exposed to saltwater.

Variations & Special Types

• Magnetic Oil Plug: Contains a magnet to trap metal particles.

• Quick-Drain Valve Plug: Allows oil changes without full removal.

• Extended Thread Plug: For thicker oil pans or custom applications.

Standards & Compatibility

• DIN 908 / DIN 910 (German industrial standards).

• ISO 4032 (Metric hex bolts).

Why Choose a Stainless Steel Hex Oil Plug?

• Reliability: Ensures a tight seal under vibration and thermal expansion.

• Compatibility: Works with synthetic and mineral oils.

• Maintenance-Friendly: Easy to remove even after prolonged use.

Ideal for automotive workshops, industrial maintenance, and marine applications where corrosion resistance is critical.