One-Hole Square Gasket | Industrial Square Washer & Sealing Gasket Manufacturer in China

A one-hole square gasket—also known as a square washer, square sealing gasket, or square spacer washer—is a precision-engineered component designed for sealing, cushioning, load distribution, and anti-rotation support. Widely used in mechanical engineering, piping systems, industrial equipment, and automotive applications, this gasket provides reliable performance in environments where tight sealing and stable fastening are critical.

Shanghai Lianyu Industrial offers customizable one-hole square gaskets in rubber, metal, and asbestos-free materials for global markets, ensuring compatibility with MEP pipelines, valves, flanges, machinery, chemical equipment, and high-temperature systems.

Key Features of One-Hole Square Gaskets

1️⃣ High-Performance Sealing

Prevents leakage at critical connections such as:

• pipelines

• valves

• flange joints

• machinery interfaces
  Ideal for liquid, gas, oil, and chemical sealing applications.

2️⃣ Superior Load Distribution

The square design increases the contact area, helping to:
✔ distribute pressure evenly
✔ prevent deformation
✔ avoid surface damage when tightening bolts or screws
Perfect for heavy-duty mechanical fastening.

3️⃣ Anti-Rotation & Enhanced Stability

Unlike round washers, the square geometry prevents rotation, making it ideal for:

• narrow installation spaces

• adjustable fastening points

• vibration environments
  This improves fastening reliability in equipment and structural systems.

4️⃣ High Corrosion & Temperature Resistance

Available in materials engineered for extreme conditions:

• high temperatures

• corrosive chemicals

• oil and fuel contact

• vibration and shock
  Suitable for industrial, automotive, power, chemical, and aerospace environments.

5️⃣ Multi-Industry Applications

Used across:

• automotive manufacturing

• chemical plants

• oil & gas pipelines

• power generation

• machinery & equipment

• aerospace & high-precision industries

Common Models of One-Hole Square Gaskets

🔹 1. Rubber Square Gaskets (NBR, EPDM, etc.)

NBR Nitrile Rubber Square Gasket

• Excellent oil resistance and abrasion resistance

• Common size: 2400 × 780 mm (customizable)

• Ideal for petroleum-based systems

EPDM Square Gasket

• Acid and alkali resistant

• Temperature range: –57°C to 200°C

• Perfect for chemical, water treatment, and HVAC systems

🔹 2. Metal Square Gaskets

Stainless Steel Square Washer (50×50×5 mm, 25.5 mm bore)

• Suitable for high-load mechanical connections

• Anti-corrosion, high strength

Boker’s Square Spacer (USA Standard)

• Ideal for confined installation spaces

• Anti-rotation structural design

MISUMI ASACR/ASACB/ASACS Series

• Fully customizable: OD, ID, thickness

• Materials include SPCC, brass, SUS304

• Precision standard parts for high-tech manufacturing

🔹 3. Asbestos-Free Square Gaskets

Eco-friendly gasket options:

• OD: 50–1000 mm

• ID: 20–800 mm

• Suitable for industries requiring environmental compliance
  Used in HVAC, water supply, food processing, and clean environments.

🔹 4. Special-Shaped Metal Winding Square Gaskets (e.g., ZD-G1205)

Designed for extreme working conditions:

• boilers

• pressure vessels

• chemical reactors
  Available in square, oval, and custom shapes
  High temperature + high pressure resistance for industrial sealing.

Why Choose Shanghai Lianyu Industrial?

• China-based manufacturer of square gaskets, industrial washers, and sealing components

• Supports OEM/ODM customization

• Materials certified to global standards

• Fast production and export to the Middle East, Europe, Africa, and Southeast Asia

• Stable quality, competitive pricing, and industry-level engineering support