Description
HMI Brass Cable Gland 22mm (7/8″) – Single & Double Compression
The HMI Brass Cable Gland 22mm (7/8″) is an industrial cable-entry solution available in Single Compression and Double Compression configurations. HMI identifies the Single Compression version as SC022 – 22mm (7/8″) and the Double Compression version as DC022 – 22mm (7/8″). HMI’s published specifications identify nickel-plated brass construction and BSC entry thread for these ranges.
The correct variant should be selected according to the cable construction, cable outer diameter, enclosure entry, thread requirement and installation environment rather than choosing a gland only because the nominal size appears to match.
For engineers, contractors and purchase managers who need help selecting the correct gland, our Cable Gland Supplier India buying guide provides a broader selection framework covering cable construction, size, thread, sealing and application requirements.
What Does 22mm (7/8″) Mean on This Cable Gland?
The 22mm (7/8″) designation identifies the nominal gland size in HMI’s product range. It should not automatically be interpreted as the exact outside diameter of the cable that the gland accepts.
Cable-gland selection depends on the manufacturer’s specified cable acceptance or clamping range. The cable’s actual outside diameter should therefore be checked against the technical specification before ordering.
This distinction is important because two cables with the same conductor size can have different overall diameters because of differences in insulation, number of cores, armour, bedding and outer sheath construction.
Thunderbolt’s detailed Cable Gland Size Selection Guide recommends selecting a gland based primarily on the cable’s actual outside diameter rather than conductor sq.mm alone.
HMI 22mm Single Compression Cable Gland
The HMI Single Compression 22mm (7/8″) Cable Gland is identified by HMI as SC022. HMI describes its Single Compression Cable Gland range as suitable for armoured and unarmoured cables and states that the gland grips the outer sheath of the cable. The published construction is nickel-plated brass with a BSC entry thread.
A Single Compression gland can be appropriate when the cable construction and project specification call for this type of cable entry.
Before purchasing, confirm:
- Cable construction
- Complete cable outer diameter
- Enclosure entry
- Thread requirement
- Required environmental protection
- Project specification
- Quantity required
Do not select the gland solely from the cable conductor size.
HMI 22mm Double Compression Cable Gland
The HMI Double Compression 22mm (7/8″) Cable Gland is identified by HMI as DC022. HMI describes its Double Compression range as suitable for armoured cables. Its published function includes gripping/sealing the inner and outer sheath while the cone and ring clamp the armour. HMI specifies nickel-plated brass construction and BSC entry thread for this range.
This makes the Double Compression configuration particularly relevant when terminating suitable armoured cables where the gland must accommodate the armour termination as part of the installation.
For a more detailed explanation of the selection decision, internally link this section to Armoured vs Unarmoured Cable Glands. Thunderbolt’s guide explains why an armoured cable requires a gland capable of properly addressing the armour termination rather than simply gripping the outer sheath.
Single Compression vs Double Compression — 22mm Comparison
HMI 22mm Single Compression
| Specification | HMI Single Compression 22mm |
| Brand | HMI |
| Product Type | Single Compression Cable Gland |
| HMI Code | SC022 |
| Nominal Size | 22mm |
| Inch Size | 7/8″ |
| Material | Nickel-Plated Brass |
| Entry Thread | BSC |
| Cable Application | Armoured / Unarmoured, subject to specification |
| Primary Function | Grip the cable outer sheath |
| Typical Selection | Suitable applications specified for Single Compression |
| Important Check | Cable OD, thread and cable construction |
HMI’s published Single Compression page lists SC022 – 22mm (7/8″), nickel-plated brass construction, BSC thread and suitability for armoured/unarmoured cables.
HMI 22mm Double Compression
| Specification | HMI Double Compression 22mm |
| Brand | HMI |
| Product Type | Double Compression Cable Gland |
| HMI Code | DC022 |
| Nominal Size | 22mm |
| Inch Size | 7/8″ |
| Material | Nickel-Plated Brass |
| Entry Thread | BSC |
| Cable Application | Armoured cables |
| Primary Function | Inner/outer sheath sealing and armour clamping |
| Armour Mechanism | Cone and ring |
| Typical Selection | Suitable armoured cable installations |
| Important Check | Cable OD, armour dimensions, bedding and thread |
These construction/application details come directly from HMI’s published Double Compression range.
Important: The tables intentionally do not give a generic cable OD range for the 22mm products. The exact acceptance range should come from the applicable HMI catalogue/datasheet rather than from a generic cable-gland chart.
How to Select the Correct HMI 22mm Cable Gland
1. Check the Cable Construction
First determine whether your cable is:
- Armoured
- Unarmoured
- Multicore
- Power cable
- Control cable
- Instrumentation cable
- Industrial machinery cable
For an armoured cable, check whether the project specification requires the HMI Double Compression configuration.
2. Measure the Cable Outer Diameter
This is one of the most important checks.
Do not assume:
22mm gland = 22mm cable.
Instead, measure the complete cable OD or obtain it from the cable manufacturer’s datasheet.
Thunderbolt’s cable-gland sizing article specifically explains that conductor size in sq.mm does not by itself determine the gland size because cable construction can change the finished cable diameter.
3. Check the Thread
The gland must match the entry in the enclosure, panel or equipment.
HMI’s published 22mm Single and Double Compression ranges specify BSC entry thread.
Never assume that different thread standards are interchangeable.
4. Check the Installation Environment
Consider whether the gland will be installed:
- Indoors
- Outdoors
- In a dusty environment
- In a wet environment
- In a high-vibration area
- In a chemical/process environment
- In a hazardous area
The required sealing and certification should be verified against the exact product and project specification.
For additional guidance, see Thunderbolt’s IP Rating on Cable Glands guide. It explains why cable size, gland type, thread and required IP protection need to be considered together.
Applications
The HMI 22mm Cable Gland can be considered for suitable industrial cable-entry applications such as:
- Electrical panels
- Control panels
- Distribution boards
- Junction boxes
- Industrial enclosures
- Switchgear
- Control equipment
- Automation systems
- Machinery
- Manufacturing facilities
- Electrical maintenance
- Industrial cable-entry installations
The exact application depends on the cable type, gland configuration, enclosure and applicable project specification.
Why Choose Thunderbolt Electromech India Pvt. Ltd. for Cable Glands?
Selecting a cable gland is not simply about finding a gland with the correct-looking nominal size.
The gland must match the cable construction, cable OD, thread, compression type and installation conditions.
Thunderbolt Electromech India Pvt. Ltd. supplies industrial cable glands for electrical contractors, panel builders, EPC companies, OEMs, maintenance teams, industries and procurement departments.
Thunderbolt’s Cable Gland range includes brands such as HMI, Comet, Dowells, Diamond and MIC, giving customers options across different industrial applications and project requirements. Thunderbolt’s own Cable Gland selection content also focuses on matching the gland to the actual cable OD and installation requirement.
Key reasons to source from Thunderbolt:
- HMI Cable Gland availability
- Single and Double Compression options
- Multiple cable-gland sizes
- Industrial brass cable-gland range
- Technical selection support
- Bulk order assistance
- Support for contractors and EPC procurement
- Pan-India supply
- Multiple industrial electrical products from one supplier
If you are unsure whether you need Single Compression or Double Compression, send the cable type, cable OD, armour details, required thread and quantity when making your enquiry.
FAQ — HMI Brass Cable Gland 22mm (7/8″)
I searched specifically around cable-gland sizing, Single vs Double Compression, cable OD, threads and installation questions. The strongest recurring customer intent is “what size gland do I need?”, “does gland size equal cable diameter?”, “single vs double compression?”, “which thread?”, and “how do I select the gland from cable OD?”. Manufacturer documentation also reinforces that cable-gland selection depends on the gland design and cable dimensions rather than nominal size alone.
I did not find useful, directly relevant cable-gland discussions on Tumblr or Medium for this specific 22mm HMI product, so I would not manufacture supposed Tumblr/Medium “customer questions.” The available evidence is much stronger from manufacturer documentation, search results and technical/community discussions.
1. What does 22mm (7/8″) mean on an HMI Cable Gland?
22mm (7/8″) is the nominal size used by HMI for this cable-gland range. It should not automatically be interpreted as the cable’s exact outside diameter. The actual cable must fall within the applicable manufacturer’s acceptance range.
2. What is the difference between HMI 22mm Single and Double Compression Cable Glands?
The Single Compression HMI range is designed to grip the cable’s outer sheath and is listed for suitable armoured and unarmoured cable applications. The Double Compression range is designed for armoured cables and uses the gland’s cone and ring to clamp the armour while sealing the cable’s inner and outer sheath.
3. Is HMI 22mm Double Compression suitable for armoured cable?
Yes. HMI specifically describes its Double Compression Cable Gland range as suitable for armoured cables and lists DC022 – 22mm (7/8″) in that range.
4. Can I use the HMI 22mm Single Compression gland for an unarmoured cable?
HMI describes its Single Compression range as suitable for armoured and unarmoured cables. However, the actual cable dimensions and installation requirements must still match the particular gland specification.
5. Does a 22mm cable gland fit a 22mm diameter cable?
Not necessarily. The nominal gland size and cable acceptance diameter are not automatically the same. Always check the manufacturer’s specified clamping/acceptance range against the complete cable OD.
6. Can I choose an HMI 22mm cable gland based only on cable sq.mm?
No. Cable conductor cross-section alone is not sufficient. The cable’s overall diameter, construction, armour and sheath dimensions also matter. Thunderbolt’s sizing guide specifically recommends checking actual cable OD.
7. What thread does the HMI 22mm Cable Gland use?
HMI’s published Single Compression and Double Compression pages specify BSC (British Standard Conduit) thread for these ranges. Confirm the exact variant and project requirement before ordering.
8. What material is the HMI 22mm Cable Gland made from?
HMI’s published specifications identify nickel-plated brass for its Single Compression and Double Compression ranges.
9. How do I order the correct HMI 22mm Cable Gland?
Provide the supplier with the HMI brand, 22mm (7/8″) size, Single or Double Compression requirement, cable construction, cable OD, thread requirement and quantity. This gives the supplier the information needed to identify the appropriate variant.
10. Can Thunderbolt help me select the correct HMI Cable Gland?
Yes. For a technical enquiry, provide the cable OD, cable type, armour information if applicable, enclosure/thread requirement and quantity. This is more reliable than ordering solely from the cable conductor size.
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