Stainless steel hexagon oil plug screw

Cold heading process is one of the new processes for pressure machining of less or no cutting
metal. It is a processing method that utilizes the plastic deformation of metal under the action of
external forces, and with the aid of molds, redistributes and transfers the volume of metal to form
the required parts or blanks. The cold heading process is most suitable for producing standard
fasteners such as bolts, screws, nuts, rivets, and pins.etc

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.