If you’re searching for cable gland M20, you’re likely already at the decision stage—not the learning stage. You know the application, you know the requirement, and now the focus is on choosing the right specification, avoiding mistakes, and getting the best value.

However, even at this stage, small selection errors can lead to improper sealing, cable damage, or frequent replacements. This guide focuses on what actually matters when buying an M20 cable gland—helping you make a confident and efficient decision.

M20 Cable Gland Size: What You Actually Need to Check

Instead of focusing only on the thread size, what really matters during selection is the cable diameter range. Typical M20 glands support cable diameters of 6 mm to 12 mm (approximately). But here’s where buyers often go wrong:

• Not checking the exact clamping range.
• Ignoring inner and outer sealing differences.
• Assuming all M20 glands fit the same cables.

Practical Insight: Two M20 glands from different suppliers may have slightly different clamping ranges. This is why relying only on “M20” without checking the datasheet often leads to mismatch issues.

Best practice: Always confirm the exact cable diameter and match it with the gland’s clamping range, not just the nominal size.

Types of Cable Gland M20 (Choose Based on Use Case)

At this stage, selection is less about options and more about suitability. The wrong type can affect both safety and performance.

• Single Compression: This is typically chosen when mechanical stress is minimal and environmental exposure is controlled.
  • Best for unarmoured cables
  • Used in panels and indoor setups
  • Cost-effective option

• Double Compression: If your application involves movement, outdoor exposure, or critical systems, this is usually the safer choice.
  • Required for armoured cables
  • Provides better sealing and cable grip
  • Preferred in industrial environments

• Weatherproof: These are essential when panels are exposed to environmental conditions.
  • Suitable for outdoor installations
  • Helps maintain IP rating under rain, dust, and humidity

• Flameproof: These are not optional in regulated environments; they are mandatory.
  • Required in hazardous areas
  • Prevents spark transmission
  • Used in oil, gas, and chemical industries

Quick tip: If you’re unsure, double compression is often the safer industrial choice.

Cable Gland M20 Price: What Affects It?

Pricing for M20 glands varies, but understanding the reasons behind it helps you evaluate value rather than just cost. Key price factors:

1. Type of Gland – Double compression glands cost more due to additional components and sealing mechanisms.
2. Material Quality – Higher-grade raw materials improve durability and corrosion resistance, directly impacting lifespan.
3. IP Rating – Higher protection (like IP68) increases cost but ensures better sealing in harsh conditions.
4. Finish and Plating – Nickel-plated finishes improve corrosion resistance and appearance.
5. Accessories Included – Some suppliers include shrouds, washers, or earth tags in pricing; others don’t.
6. Order Quantity – Bulk orders significantly reduce per-unit cost.

A slightly higher upfront cost often results in longer service life and fewer replacements—making it more economical in the long run.

Common Buying Mistakes to Avoid

Even experienced buyers sometimes make small errors that lead to bigger issues later. Avoiding these mistakes saves both time and replacement costs:

1. Selecting Only Based on Price – A lower price often means a compromise in material or sealing quality.
2. Ignoring Cable Diameter Accuracy – Even a 1–2 mm mismatch can affect sealing performance.
3. Using Single Compression for Armoured Cable – This reduces grip and compromises safety.
4. Skipping Environmental Considerations – Indoor-rated glands used outdoors lead to early failure.
5. Not Ordering Accessories – Missing components like shrouds or earth tags affect performance and compliance.

Most failures are not due to product defects; they are due to incorrect selection.

How to Select the Right Cable Gland M20 (Quick Checklist)

Before placing your order, run through the checklist below. It reduces back-and-forth communication and ensures faster procurement.

• Exact cable diameter.
• Armoured or unarmoured cable.
• Application type (panel, outdoor, hazardous).
• Required IP rating.
• Gland type (single/double compression).
• Required accessories.
• Quantity for pricing advantage.

Accessories That Make a Difference

Cable glands are part of a system, not standalone components. Skipping accessories may reduce initial cost, but it often leads to reduced performance and a shorter lifespan.

• Locknuts:
  • Secure the gland to the panel.
  • Ensure firm installation.

• Earth Tags:
  • Maintain proper grounding.
  • Essential for armoured cables.

• PVC Shrouds:
  • Provide additional protection.
  • Prevent dust and moisture ingress.

• Sealing Washers:
  • Improve IP rating.
  • Useful for uneven surfaces.

When M20 is the Right Size (and When It’s Not)

M20 is one of the most commonly used sizes, but it’s not universal.

Choose M20 when:

• Cable falls within the 6–12 mm range.
• Standard panel entry size is required.
• Medium-duty applications.

Avoid M20 when:

• Cable diameter exceeds range.
• Heavy-duty industrial cables are used.
• A larger sealing area is required.

Choosing the wrong size results in:

• Poor sealing
• Cable slippage
• Reduced protection

Sourcing Cable Gland M20: What Buyers Look For

When selecting a supplier, most buyers prioritize:

• Accurate dimensions and clamping range.
• Consistent quality across batches.
• Reliable delivery timelines.
• Ability to handle bulk and repeat orders.
• Flexibility for customization.

Manufacturers like Volt Metal Industries focus on these aspects, supplying precision-engineered cable glands suitable for industrial applications while ensuring consistency for long-term supply requirements.

Final Thoughts

Buying a cable gland is a straightforward process when you focus on the right factors – cable size, application, gland type, and quality. Instead of overcomplicating the decision, a practical approach works best:

• Match the gland to the cable
• Choose the right type for the application
• Prioritize reliability over short-term cost savings

In electrical systems, small components often have a big impact. Selecting the right cable gland ensures not just performance, but long-term safety and efficiency. Making the right choice the first time saves both time and cost, especially in industrial setups where reliability is critical.

If you are looking for a brass M20 cable gland manufacturer and exporter, Volt Metal Industries supplies durable cable glands and accessories designed for demanding industrial environments worldwide.

 www.voltmetalind.com

 info@voltmetalind.com

 +91 9879332240