Brass Strain Relief Gland
Heavy-duty brass strain relief glands designed for secure cable entry, mechanical retention, and environmental sealing in industrial enclosures and machinery. Precision-machined from solid brass with nickel plating, these glands provide high mechanical strength, excellent EMC shielding capability (with EMC insert options), and reliable ingress protection against water, dust, and aggressive chemicals. Compatible with global industrial standards (Metric, PG, NPT, and G threads), they are engineered for seamless integration across European, North American, and global machinery markets.
Product Overview
Heavy-duty brass strain relief glands designed for secure cable entry, mechanical retention, and environmental sealing in industrial enclosures and machinery. Precision-machined from solid brass with nickel plating, these glands provide high mechanical strength, excellent EMC shielding capability (with EMC insert options), and reliable ingress protection against water, dust, and aggressive chemicals. Compatible with global industrial standards (Metric, PG, NPT, and G threads), they are engineered for seamless integration across European, North American, and global machinery markets.
Key Features
Body Material: Solid brass (H59 / CuZn39Pb3) with corrosion-resistant nickel plating.
Sealing Structure: NBR / EPDM multi-rib seal paired with a clamping claw mechanism to ensure simultaneous environmental sealing and high pull-out resistance.
Clamping Mechanism: Polyamide (PA6) clamping insert engineered to distribute uniform radial pressure, preventing cable sheath damage and twisting.
Core Functions: Secures incoming cables, relieves mechanical strain on internal terminal blocks, and maintains IP68/IP69K ratings.
Technical Specifications
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Thread Types & Global Standards |
Metric (ISO), PG (DIN 40430), NPT (ANSI/ASME), and G (PF) threads. |
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Thread Sizes |
Metric M12 to M63; PG7 to PG48; NPT 1/4" to 2". |
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Cable Clamping Range |
3 mm to 44 mm (dependent on thread size). |
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Ingress Protection |
IP68 (5 bar, 30 min) / IP69K. |
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Operating Temperature |
|
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Static |
-40°C to +100°C (short-term up to +120°C). |
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Dynamic |
-20°C to +80°C. |
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Material Compliance |
RoHS, REACH, CE compliant. |
Product Options
Plating Options: Standard nickel-plated brass, unplated natural brass, or chrome finish.
Sealing Insert Materials: EPDM (enhanced UV and ozone resistance) or Viton (high-temperature up to +200°C and chemical resistance).
Special Configurations: EMC grounding locknuts, multi-hole sealing inserts, and reduced-entry inserts for thin cables.
Thread Lengths: Standard thread or extended thread variants available for thick-walled enclosures.
Applications
Electrical control panels and automation switchboards.
Heavy industrial machinery and robotics.
Outdoor junction boxes and telecommunication cabinets.
Renewable energy installations (solar inverter housings, wind turbine controllers).
Marine and offshore equipment requiring high salt-spray resistance.
OEM & ODM Customization
Non-Standard Threads: Custom thread pitches, lengths, or special imperial/metric conversions machined per drawing.
Body Dimensions: Custom hex body sizes or extended barrel designs for specialized enclosure clearances.
Material Grades: Available in alternative copper alloys upon request.
Laser Marking: Custom part numbers, batch codes, or client logos laser-engraved on the hex flats.
Packaging: Bulk industrial packaging or kitted sets with locknuts and O-rings.
Quality Control
Manufacturing Process: High-precision CNC multi-axis turning centers ensure strict dimensional repeatability and thread concentricity.
Inspection Protocol:
100% thread GO/NOGO gauge testing to prevent installation assembly failures.
Optical comparator dimension checks on critical sealing diameters.
In-house torque and pull-out force testing verifying cable retention force limits.
Salt spray testing (ASTM B117) verifying minimum 96-hour corrosion resistance for nickel coatings.
Documentation: Material Test Reports (MTR / EN 10204 3.1), RoHS declarations, and dimensional inspection sheets provided upon request.
Frequently Asked Questions
Q: How do I select the correct gland size for my cable?
A: Match the outer diameter (OD) of your cable to the clamping range specified in the technical data table. The cable OD must fall within the min-max range of the gland's sealing insert.
Q: Can these brass glands withstand high vibration environments?
A: Yes. The internal Polyamide clamping claw mechanically locks the cable jacket, absorbing mechanical tension and vibration to protect internal terminations.
Q: Are locknuts and O-rings included with the gland?
A: Standard shipments include the brass gland body, clamping insert, and sealing claw. Locknuts and thread sealing O-rings can be supplied pre-assembled or packed separately per purchase order specifications.
Q: What is the difference between standard NBR seals and optional Viton seals?
A: Standard NBR seals suit temperatures from -40°C to +100°C with good oil resistance. Viton seals are recommended for extreme chemical exposure and operating temperatures up to +200°C.
Q: What is the minimum order quantity (MOQ) for custom thread sizes?
A: MOQ for non-standard threads or custom dimensions typically starts at 500 pcs per size, depending on raw material availability and re-tooling requirements.
Q: What is the standard lead time for production orders?
A: Standard catalog items in common sizes (M12–M32) ship within 7–10 days. Custom OEM orders typically require 3–4 weeks including sample sign-off.
Request a Quote
To receive a prompt technical review and commercial quotation, please provide the following details:
Part Number or Configuration: (e.g., Metric thread, PG thread, NPT thread, or custom drawing)
Thread Size & Pitch: (e.g., M20 x 1.5, PG13.5, 1/2" NPT)
Cable Outer Diameter (OD): (Min–Max mm)
Required Quantity: (Annual forecast or per-batch order quantity)
Special Requirements: (e.g., Viton seal, EMC requirement, specific packaging or test reports)
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