Nylon Cable Gland Size Chart The Complete Guide for Buyer

December 15, 2025 7 minutes

Selecting the right nylon cable gland might sound like a small detail, but for engineers and procurement specialists, it’s often the difference between a safe, efficient installation and costly downtime. Whether you’re designing electrical panels for automation equipment, marine enclosures, or solar junction boxes, knowing the correct nylon cable gland size chart is essential.

Let’s explore everything B2B buyers and technical teams need to know — from sizing and materials to compatibility and certification — so you can make the right call for your next project.

What Is a Nylon Cable Gland?

A nylon cable gland (also known as a plastic cable gland or PA6 gland) is a mechanical device that secures cables through enclosure walls or electrical equipment. It seals the entry point, protecting against dust, moisture, and tension that can damage the cable connection.

Engineers prefer nylon for several reasons:

It’s lightweight but strong.
It has excellent flame-retardant and weather-resistant properties.
It remains cost-effective and easy to install without special tools.

That’s why nylon cable glands are common in control cabinets, solar systems, robotics, and LED lighting — essentially anywhere durability and safety meet cost-efficiency.

Why the Nylon Cable Gland Size Chart Matters

Choosing the wrong size isn’t just an inconvenience — it risks cable slippage, poor sealing, and failed IP ratings. The nylon cable gland size chart helps you identify which gland corresponds to your cable’s outer diameter (OD), ensuring a tight fit that maintains IP68 (or higher) protection.

If you’re buying for industrial or OEM use, size consistency also means streamlined installation, less rework, and lower supplier variability.

Cable Gland Size Chart (Metric) — Nylon, Brass and Stainless Steel

Below is the size reference we use for metric-thread glands in all three body materials. Panel cut-outs are driven by the thread rather than the material — an M20 entry needs a 20.2 mm hole whether the body is nylon, nickel-plated brass or stainless steel — so use this chart for the hole and the material datasheet for the clamping range and temperature.

Gland Type	Thread Size (Metric)	Cable Diameter Range (mm)	Dome Nut Outer Diameter (mm)	Mounting Hole (mm)	Length (mm)
M12	M12×1.5	3–6.5	17.6	12.2	22
M16	M16×1.5	4–8	22.3	16.2	24
M20	M20×1.5	6–12	26.8	20.2	27
M25	M25×1.5	11–16	32.9	25.2	28.5
M32	M32×1.5	15–20	40.4	32.2	30
M40	M40×1.5	19–28	50.1	40.3	31
M50	M50×1.5	27–35	59.3	50.3	35
M63	M63×1.5	34–44	72.4	63.3	38

Pro tip: always measure your cable’s outer diameter with precision before selecting the gland — not its nominal size.

The Same Thread in Three Materials: What Changes

What changes	Nylon PA66	Nickel-plated brass	Stainless steel 304 / 316L
Thread size and mounting hole	As charted above	Identical — the hole is set by the thread	Identical — the hole is set by the thread
Clamping range	As charted above	Standard series follows the same size steps	Follows the same size steps; confirm against the model datasheet
Temperature range	−40 °C to +100 °C	−40 °C to +120 °C	−40 °C to +200 °C
Strength and weight	Light, moderate strength; plastic enclosure friendly	Heavy, high strength; earthing path through the body	Heaviest duty; corrosion resistance for salt, chemical and washdown areas
Minimum order	1,000 pcs per size	1,000 pcs per size	300 pcs per size

The three materials are stocked in nylon, nickel-plated brass and stainless steel, so a project can be specified in one thread system throughout and switched from plastic to metal only where the environment demands it.

Key Factors to Consider When Selecting Nylon Cable Glands

Choosing a gland isn’t just about picking a number from a chart. For engineers and supply-chain specialists, several technical parameters must align:

Thread type: Metric (M), PG, NPT, or G thread — depending on the region or enclosure design.
Sealing range: Ensure it matches your cable’s outer diameter tolerance.
Ingress Protection (IP) rating: IP68 is common for waterproof models; IP69K for high-pressure washdowns.
Temperature resistance: Nylon typically operates from –40°C to +100°C.
Color and aesthetic: Light gray (RAL7035) is standard for industrial panels; black for outdoor UV resistance.
Compliance: Look for UL, CE, or RoHS certification for global projects.

Nylon vs. Brass Cable Glands

For B2B buyers comparing material types, it’s helpful to see how nylon stacks up against brass or stainless steel glands.

Feature	Nylon Cable Gland	Brass Cable Gland
Material	Polyamide (PA6)	Nickel-plated brass
Weight	Very light	Heavier
Corrosion Resistance	Excellent	Good (may require coating)
Cost	Low	Moderate to high
Application	Indoor, light-duty, plastic enclosures	Outdoor, industrial, metal housings
Installation	Tool-free	Requires wrench

Verdict: For panel builders, solar projects, and equipment exports, nylon cable glands often balance protection, durability, and value perfectly.

Common Applications in Industrial Settings

Engineers rely on nylon cable glands across many industries:

Control panels and automation cabinets.
Marine and offshore electronic systems (with UV-stabilized PA6).
Renewable energy junction boxes and inverter housings.
Telecommunication base stations and antennas.
LED lighting systems, especially IP67/IP68-rated outdoor models.

When sourcing, always confirm the operating environment and seal performance to ensure long-term reliability.

How to Read a Nylon Cable Gland Specification

Technical datasheets often include values like “M20×1.5, Ø6–12mm, PA6, IP68, UL approval.” Here’s how to interpret that quickly:

M20×1.5: Metric thread size and pitch.
Ø6–12mm: Usable sealing range (cable diameter).
PA6: Material (polyamide 6).
IP68: Rated for dust-tight and immersion protection.
UL approval: Meets safety standards for North America.

The five values above are the short form. A full datasheet adds the parameters below, and these are the ones procurement and QA actually check against the drawing:

Parameter	What it tells you	Example value
Thread type	Which enclosure thread the gland fits: Metric (M), PG, NPT or G	M20 × 1.5
Clamping range	The cable diameters that will actually seal	6–12 mm
IP rating	Dust and water protection to IEC 60529	IP68
Material	Body polymer or metal grade	Nylon PA66
Sealing material	Inner gasket or O-ring compound, which sets the chemical and temperature limits	NBR rubber
Operating temperature	Continuous thermal range, not a peak	−40 °C to +100 °C
Colour	Standard black (UV-stabilised) or grey RAL 7035	Black
Locknut included	Whether the matching locknut ships with the gland or is priced separately	Yes

Five ways a spec sheet gets misread

IP68 is a property of the assembly. It only holds with the correct cable diameter, a new sealing ring and the right torque — not because one part of the gland is sealed.
Thread pitch matters as much as thread size. M20 × 1.5 is not M20 × 2, and a PG13.5 thread is not a drop-in replacement for M20.
Accessories are often excluded. Check whether the locknut and sealing washer are in the box or billed separately — it changes the landed cost per entry.
Temperature is continuous, not peak. Nylon deforms above its continuous range, so read that line against the real operating temperature of the panel, not the ambient average.
Colour is not cosmetic. Black and grey nylon can carry different UV performance, so the colour line matters for anything permanently outdoors.

If you’re specifying in bulk, keep a size chart PDF handy to cross-check stock availability and ordering codes from your supplier.

Installation Tips for Engineers and Technicians

Even the best gland can fail if installed improperly. Keep these quick installation steps in mind:

Select the correct thread type and size per your enclosure cutout.
Insert gland body through the mounting hole.
Tighten the locknut inside the enclosure (hand-tight is often enough).
Pass the cable through and ensure the sealing ring grips firmly.
Finish with the dome cap to compress the gasket.

Avoid over-torquing — it can deform the nylon threads and reduce sealing efficiency.

Sourcing Nylon Cable Glands for B2B & Bulk Orders

If you’re purchasing nylon cable glands in bulk for OEM production or resale, look for suppliers who offer:

Custom logo printing or engraving.
OEM/ODM packaging.
Size range consistency across M12 to M63 or higher.
International certifications and RoHS compliance.
Short lead times and stable inventory.

Looking for a reliable manufacturer? Send an inquiry today — our engineering team can help match the right nylon gland for your exact specification, application, and MOQ requirement.

The nylon cable gland size chart isn’t just a reference tool — it’s a foundation for proper design and procurement in every electrical project. Selecting the right gland ensures your system’s integrity, safety, and compliance.

Whether you’re a panel builder, electrical engineer, or buyer managing global supply chains, knowing your specifications helps prevent costly installation errors.

If you need custom sizing, bulk orders, or technical samples, contact our support team or request a quotation now. Let’s build safer, smarter connections — one gland at a time.

FAQ

What size cable gland do I need for a 10mm cable?

A 10mm cable typically fits an M20 nylon cable gland, which covers a 6–12mm range.

Are nylon cable glands waterproof?

Yes, most quality nylon glands are IP68-rated, offering dustproof and waterproof protection.

Can nylon cable glands be used outdoors?

Absolutely. UV-stabilized nylon glands perform well in outdoor and solar applications.

What’s the temperature limit of nylon glands?

They generally withstand –40°C to +100°C, and some reach +120°C depending on grade.

How do I convert PG to metric sizes?

While PG threads are older German standards, you can compare similar sealing ranges using a nylon cable gland size conversion chart from your supplier’s resources.

Do nylon, brass and stainless steel glands use the same size chart?

Yes for the thread and the panel hole, no for everything else. An M20 entry is a 20.2 mm hole in all three materials, so the size chart above applies throughout. The clamping range, temperature window, mechanical strength and minimum order quantity differ per material, so confirm those on the datasheet for the material you are ordering.