Strain Relief Cable Gland — Cord Grip — Factory-Direct, Bulk & OEM Supply
Strain Relief Cable Gland — Cord Grip | Manufacturer & Supplier
If you’re running flexible cables, power cords, or control cables into equipment that moves, vibrates, or gets pulled — you need more than a basic seal. You need a strain relief cable gland. The spiral cord grip body wraps around the cable and distributes tension along its length, preventing the cable from being pulled out of the fitting or damaged at the entry point. It’s a simple difference in design — but it matters a lot in applications where cables take repeated mechanical stress.
We are a strain relief cable gland manufacturer and global supplier based in Yueqing, Zhejiang, China — supplying distributors, wholesalers, and OEM partners across 50+ countries directly from our factory. Available in PG and metric thread sizes, in brass and nylon PA66, with each size offered in two cable entry ranges — so you get the right grip for your exact cable diameter.
What is a Strain Relief Cable Gland?
A strain relief cable gland — also called a cord grip cable gland or cable gland cord grip — is a cable entry fitting with a spiral or helical body that wraps around the cable’s outer sheath, distributing mechanical load along the cable rather than concentrating it at a single point. Unlike a standard cable gland, which grips the cable with a compression seal alone, a strain relief gland is specifically designed to absorb pull-out force, vibration, and repeated cable movement — making it the right choice for flexible cables, power cords, machinery wiring, and any application where the cable experiences ongoing mechanical stress at the entry point.
Cord Grip vs Cable Gland — What's the Difference?
This is one of the questions we get asked most often — and the answer is simpler than most people expect. A cord grip and a strain relief cable gland are essentially the same thing, just named differently depending on the market and application. In North America, cord grip is the more common term — you’ll hear it used for flexible cord entries on industrial equipment and appliances. In Europe and Asia, strain relief cable gland or cable gland with strain relief is the standard terminology. The key difference from a standard cable gland is the spiral body design — it grips more of the cable surface, distributes tension more evenly, and handles repeated movement far better than a standard compression fitting.
Our Strain Relief Cable Gland Range
We manufacture strain relief cable glands in four variants — here’s how to choose between them.
Nickel-plated brass cord grip for heavy-duty industrial machinery, control panels, and automation equipment. Mechanically strong, corrosion-resistant, and rated IP65 — the standard choice where the cable experiences regular pulling, vibration, or movement.
Thread: PG7–PG21 · M12–M27 · IP65
Material: Nickel-plated brass · CE & RoHS ✓
Material: Nickel-plated brass · CE & RoHS ✓
Lightweight nylon cord grip for plastic enclosures, consumer equipment, telecoms, and cost-sensitive OEM applications. Non-conductive, RoHS-compliant, and available in black — the go-to for light industrial and commercial installations.
Thread: PG7–PG21 · M12–M27 · IP65
Material: Nylon PA66 · Colour: Black · CE & RoHS ✓
Material: Nylon PA66 · Colour: Black · CE & RoHS ✓
Strain Relief Cable Gland — Wide Cable Range
Each size in our range comes in two cable entry ranges — for example, PG9 is available for cables 2–6mm and 4–8mm. This means you get a precise grip for thin cables without over-clamping, and the right fit for thicker cables in the same thread size. Reduces the number of SKUs you need to stock.
Two cable ranges per size — see size chart below
Available in brass and nylon
Available in brass and nylon
For OEM manufacturers who need non-standard cable ranges, specific thread types, custom colours, or private label packaging — we manufacture to your specification. Same spiral body design, same quality — made to your drawing or sample.
Thread: PG, Metric, NPT on request
MOQ confirmed at quotation · CE & RoHS ✓
MOQ confirmed at quotation · CE & RoHS ✓
Looking for a different type? → View our full Cable Gland range — brass, nylon, waterproof, explosion-proof, and more.
Specifications & Certifications
| Specification | Details |
|---|---|
| Body Materials | Nickel-plated brass and Nylon PA66 |
| IP Rating | IP65 — tested to IEC 60529 on every production batch |
| Thread Standards | PG thread (PG7–PG21) · Metric thread (M12–M27) |
| Cable Entry Ranges | Two ranges per size — narrow and wide — for precise cable grip |
| Certifications | CE marking · RoHS compliant · Certificates of conformity with every order |
| Manufacturing Standard | IEC 60670-22 · IEC 60529 |
| HS Code | 8536.90 — for import/export documentation |
Strain Relief Cable Gland Size Chart
Each size is available in two cable entry ranges — match your cable’s outer diameter to the range, and match the thread to your enclosure. All dimensions in millimetres.
| Size | Cable Range (mm) | AG / Thread OD (mm) | GL (mm) | Spanner (mm) |
|---|---|---|---|---|
| PG7 | 3–6.5 | 12.5 | 8 | 16 |
| 2–5 (narrow range) | 12.5 | 8 | 16 | |
| PG9 | 4–8 | 15.2 | 8 | 19 |
| 2–6 (narrow range) | 15.2 | 8 | 19 | |
| PG11 | 5–10 | 18.6 | 8 | 22 |
| 3–7 (narrow range) | 18.6 | 8 | 22 | |
| PG13.5 | 6–12 | 20.4 | 9 | 24 |
| 5–9 (narrow range) | 20.4 | 9 | 24 | |
| PG16 | 10–14 | 22.5 | 10 | 27 |
| 7–12 (narrow range) | 22.5 | 10 | 27 | |
| PG21 | 13–18 | 28.3 | 10 | 33 |
| 9–16 (narrow range) | 28.3 | 10 | 33 |
| Size | Cable Range (mm) | AG / Thread OD (mm) | GL (mm) | Spanner (mm) |
|---|---|---|---|---|
| M12×1.5 | 3–6.5 | 12 | 8 | 16 |
| 2–5 (narrow range) | 12 | 8 | 16 | |
| M16×1.5 | 4–8 | 16 | 8 | 19 |
| 2–6 (narrow range) | 16 | 8 | 19 | |
| M18×1.5 | 5–10 | 18 | 8 | 22 |
| 3–7 (narrow range) | 18 | 8 | 22 | |
| M20×1.5 | 6–12 | 20 | 9 | 24 |
| 5–9 (narrow range) | 20 | 9 | 24 | |
| M22×1.5 | 10–14 | 22 | 10 | 27 |
| 7–12 (narrow range) | 22 | 10 | 27 | |
| M25×1.5 | 13–18 | 25 | 10 | 33 |
| 9–16 (narrow range) | 25 | 10 | 33 | |
| M27×1.5 | 13–18 | 27 | 10 | 33 |
| 9–16 (narrow range) | 27 | 10 | 33 |
Need a size or cable range not listed? Send us your cable OD and thread spec — we’ll confirm availability within 24 hours.
How to Choose the Right Strain Relief Cable Gland
Five things to confirm before you order — getting these right means the right grip and seal first time.
01
Do you actually need strain relief?
If your cable is fixed — laid in a tray, clipped to structure, and never moved — a standard gland is fine. If your cable is flexible, gets pulled, moves with machinery, or is repeatedly plugged and unplugged — you need a strain relief cable gland. The spiral body is specifically designed for that mechanical stress.
02
Choose your material — brass or nylon
Brass for heavy-duty industrial use, outdoor installations, or anywhere mechanical strength matters. Nylon PA66 for plastic enclosures, light industrial, and cost-sensitive OEM applications where a non-conductive body is preferred.
03
Confirm your thread standard
PG for Europe and Asia, metric for global ISO installations. Match the thread to your enclosure knockout — not the cable. Always check the enclosure datasheet before ordering.
04
Choose the right cable range for your cable OD
Each size comes in two cable entry ranges — a narrow range and a wider range. Your cable’s outer diameter must fall within the stated range. If your cable is on the thin end of the size — go for the narrow range option for a tighter grip. If in doubt, measure your cable OD precisely — don’t estimate.
05
Check your IP requirement
Our strain relief cable glands are rated IP65 — fully dust-tight and protected against low-pressure water jets. If you need IP67 or IP68 for submersion or continuous wet exposure, our waterproof cable gland range is the better choice.
Where Our Strain Relief Cable Glands Are Used
Here are the most common applications we supply into — and what we’d typically recommend for each.
Industrial Machinery
Brass strain relief IP65 in PG or metric — for CNC machines, conveyor systems, and production equipment where power cables and control cables are subject to continuous vibration and occasional pulling.
Consumer & Commercial Equipment
Nylon IP65 — OEM manufacturers of appliances, power tools, test equipment, and commercial electronics use our nylon cord grips as the standard cable entry fitting on their production line. Lightweight, inexpensive, and RoHS-compliant.
Telecoms & Data Equipment
Small-size strain relief glands (PG7–PG13.5) for data cables, patch cords, and fibre optic cables entering outdoor cabinets and street furniture. Non-conductive nylon body avoids interference with sensitive signal cables.
Automation & Robotics
Brass or nylon metric IP65 for servo cable and sensor wiring entries on robot arms and moving machine heads. The spiral cord grip handles the constant cable flexing that would eventually fatigue a standard compression entry.
Building & Infrastructure
IP65 nylon or brass for external lighting, security systems, and building automation wiring. Available in bulk with mixed sizes on a single order — useful for M&E contractors and electrical wholesalers.
Control Panels & Switchgear
Nylon or brass PG/metric IP65 — for flexible cable entries on control panels, motor starters, and power distribution boards where flexible conduit or trailing cable needs secure entry.
Strain Relief Cable Gland Manufacturer — Why Source from Difvan?
Two cable ranges per size — stocked
Every size we make comes in a narrow and wide cable range. For distributors and wholesalers, this means fewer returns and better fitment for your customers — without stocking twice the SKU count.
Factory-direct from Yueqing
As a cord grip cable gland manufacturer and direct exporter, there are no trading companies between you and our factory. Factory pricing, faster lead times, and direct communication with the people making your order.
Bulk, wholesale & OEM supply
We work with distributors, wholesalers, and OEM manufacturers across 50+ countries. Mixed sizes, custom specifications, and private label — all confirmed at the quotation stage.
Need Strain Relief Cable Glands from a Trusted Manufacturer?
Whether you’re a distributor building your product range, a wholesaler looking for a reliable bulk cord grip cable gland supplier, or an OEM manufacturer who needs custom specifications — tell us your thread standard, cable size, range, quantity, and material, and we’ll respond with factory pricing and lead time within 24 hours.
Questions We Get Asked About Strain Relief Cable Glands
Common questions from distributors, OEM buyers, and electrical engineers sourcing cable glands from Difvan.
What is the difference between a cord grip and a cable gland?
A cord grip and a strain relief cable gland do the same job — they’re just different names for the same type of fitting, used in different markets. In North America, cord grip is the common term. In Europe and Asia, strain relief cable gland or cable gland with strain relief is standard. Both use a spiral body to grip the cable and distribute mechanical load — the key difference from a standard cable gland, which only uses a compression seal.
What size strain relief cable gland do I need?
You need two measurements — your cable outer diameter (OD) and the thread size of your enclosure knockout. Your cable OD must fall within the gland’s stated cable entry range. Each of our sizes comes in two ranges — a narrow and a wider option — so if your cable is on the thin end, choose the narrow range for a tighter grip. Use the size chart above or send us your cable spec and we’ll confirm the right size and range.
Are strain relief cable glands waterproof?
Our strain relief cable glands are rated IP65 — which means they’re fully dust-tight and protected against low-pressure water jets. They’re suitable for outdoor use and light wet environments, but not for submersion or continuous water exposure. If you need IP67 or IP68 — for example, in solar combiner boxes, marine installations, or buried applications — our waterproof cable gland range is the better fit.
What cable types work with strain relief cable glands?
Strain relief cable glands are designed for unarmoured flexible cables — round flexible cords, rubber-sheathed cables, PVC-insulated cables, data cables, and sensor cables. They are not suitable for SWA armoured cable — for that, you need a double compression cable gland. If you’re unsure whether your cable type is compatible, send us the cable spec and we’ll advise.
Can we order strain relief cable glands in bulk with mixed sizes?
Yes — and it’s one of our most common order types. Distributors and wholesalers regularly order mixed PG and metric sizes across both brass and nylon variants in a single shipment. Just send us your bill of materials — sizes, cable ranges, materials, and quantities — and we’ll quote the full order and consolidate into one delivery within the agreed lead time.
Do you offer custom strain relief cable glands for OEM applications?
Yes. We manufacture custom cord grip cable glands for OEM manufacturers who need non-standard cable ranges, specific thread types (including NPT), custom colours, or private label packaging. Send us your technical requirements — or a sample — and our team will respond with a quote within 24 hours. Pre-production samples are available before bulk commitment.
What is the pull-out force rating for your strain relief cable glands?
Our strain relief cable glands are manufactured and tested to the cable retention (pull-out force) requirements defined in IEC 60670-22. The exact pull-out force varies by size and cable diameter. If you need confirmed pull-out force figures for a specific size and cable OD — for example, for an equipment safety specification or compliance document — contact us and we’ll provide the test data from our factory.
Get In Touch
Contact Difvan Directly
Response within 24 hours. Factory direct — no middlemen.
Factory Address DIFVAN Co., Ltd.
No.1 HongQi Road, Xinguang Industrial Zone,
Liushi, Yueqing, Wenzhou, Zhejiang, China 325603
No.1 HongQi Road, Xinguang Industrial Zone,
Liushi, Yueqing, Wenzhou, Zhejiang, China 325603
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