Industrial Wire Harness Strain Relief Bushing

Product Specifications

Technical details and manufacturing context for Industrial Wire Harness Strain Relief Bushing

Definition

An industrial wire harness strain relief bushing is a mechanical component used to anchor and protect wire harnesses, cables, or conduits where they pass through panels, enclosures, or bulkheads. Its primary function is to absorb mechanical stress, vibration, and tension, preventing damage to the wires and ensuring a secure, sealed connection. This component is essential for maintaining electrical integrity, preventing wire pull-out, and protecting against environmental contaminants like dust and moisture. It is a standard part in the assembly of control panels, machinery, and electrical enclosures across various industries.

Typical materials include Nylon 6/6, neoprene rubber, and stainless steel, offering a balance of mechanical strength, flexibility, and corrosion resistance. The bushing accommodates wire gauges from 18 to 10 AWG and mounting hole diameters from 6.4 to 50.8 mm. It provides a pull-out force rating of 80 to 250 N, a minimum bending radius of 5 to 15 mm, and an operating temperature range of -40 to 105 °C. Ingress protection ratings range from IP54 to IP68 per IEC 60529, and flammability rating is UL 94 V-2. Thread sizes are available in PG7 to PG48 per DIN 40430, with metric or NPT options. Insulation resistance is at least 100 MΩ at 500 V DC per IEC 60670, and dielectric strength is at least 2.5 kV for 1 minute at 50 Hz per IEC 60243. Weight varies from 5 to 50 g depending on size and material.

Selection requires verifying the mounting hole diameter, wire gauge, environmental conditions, and required ingress protection. Installation involves feeding the harness through the central aperture and tightening the locking mechanism to compress the bushing, gripping the harness and sealing against the panel. Maintenance includes periodic inspection for cracks, wear, or loosening. Failure may occur if the bushing is overloaded beyond its pull-out rating or exposed to temperatures outside its range. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The bushing is installed in a pre-drilled hole. The wire harness is fed through its central aperture. When the locking mechanism (e.g., a nut or clamp) is tightened, it compresses the bushing's body, causing it to grip the harness firmly and form a seal against the panel surface, thereby immobilizing the harness and distributing any external forces.

Common Materials

Nylon 6/6, Neoprene Rubber, Stainless Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Mounting Hole DiameterRequired	6.4–50.8 mm	Diameter of the hole required in the panel for installation
Minimum Bending RadiusRequired	5–15 mm	The smallest radius the cable can be bent at the bushing without damage
Pull-Out Force RatingRequired	80–250 N	Maximum axial force the bushing can withstand before the cable is dislodged
Operating Temperature RangeRequired	-40–105 °C	Ambient temperature range for safe and reliable operation
Ingress Protection RatingRequired	IP54–IP68 IP Code	Level of protection against solid objects and liquids (e.g., IP67)IEC 60529
Material	PA66	Flame retardant, UV stabilizedUL 94 V-2
Flammability Rating	V-2	Self-extinguishing within 30 sUL 94
Wire Gauge Range	18–10 AWG	Accommodates common wire sizes
Thread Size	PG7–PG48	Metric or NPT options availableDIN 40430
Insulation Resistance	≥100 MΩ	At 500 V DCIEC 60670
Dielectric Strength	≥2.5 kV	For 1 minute at 50 HzIEC 60243
Weight	5–50 g	Depends on size and material

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Bushing Body Part
Main structural element that houses the cable and provides the sealing surface

Material: Nylon 6/6
Sealing Gland Part
Compressible ring that forms a seal around the cable and against the panel

Material: Neoprene Rubber
Locking Nut Part
Threaded component that tightens to compress the seal and secure the bushing in the panel

Material: Nylon 6/6 or Stainless Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Industrial Wire Harness Strain Relief Bushing.

Manufacturers of Industrial Wire Harness Strain Relief Bushing

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Nangong Letu Automotive Components Co., Ltd.

Nangong, Hebei, CN

IATF 16949:2016

Also makes: Molded Rubber Part, Extruded Rubber Profile, Automotive Weatherstrip and 7 more

Listed on the company's own website · profile compiled by CNFX from public sources

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Frequently Asked Questions

What is the primary function of a strain relief bushing?

It anchors and protects wire harnesses at entry/exit points, absorbing mechanical stress and preventing wire pull-out.

What materials are commonly used?

Nylon 6/6, neoprene rubber, and stainless steel are typical materials, offering strength, flexibility, and corrosion resistance.

How do I select the right bushing size?

Consider the mounting hole diameter, wire gauge range, and required ingress protection. Verify with the manufacturer for your specific application.

What maintenance is required?

Periodically inspect for cracks, wear, or loosening. Replace if damaged to maintain sealing and strain relief.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 50 psi (sealing pressure)
other spec:	Cable diameter range: 3mm to 25mm, IP68/IP69K rating when properly installed
temperature:	-40°C to +125°C