NBR Gland Sealing Washer
The NBR Gland Sealing Washer creates a reliable liquid- and dust-tight seal between cable glands and enclosure walls. Molded from high-grade Nitrile Butadiene Rubber (NBR), this flat gasket prevents moisture, dust, and oil ingress in industrial electrical installations, maintaining enclosure ratings up to IP68.
Product Overview
The NBR Gland Sealing Washer creates a reliable liquid- and dust-tight seal between cable glands and enclosure walls. Molded from high-grade Nitrile Butadiene Rubber (NBR), this flat gasket prevents moisture, dust, and oil ingress in industrial electrical installations, maintaining enclosure ratings up to IP68.
Key Features
Material: Commercial-grade NBR (Nitrile Rubber) with balanced hardness (Shore A 70±5) for optimal compression and recovery.
Sealing Structure: Flat profile design ensuring uniform surface contact across threaded entries and flange faces.
Clamping Compatibility: Designed to seat flush against standard metric (M-thread), PG, and NPT cable gland locknuts.
Primary Function: Forms a secondary environmental barrier against water, dust, coolants, and mild chemicals.
Technical Specifications & CAD Resources
|
Thread Standards |
Metric (M12 to M63), PG (PG7 to PG48), NPT (1/4" to 2"). |
|
Material Hardness |
70 Shore A. |
|
Operating Temperature |
-40°C to +100°C (short term up to +120°C). |
|
Ingress Protection |
Supports IP66, IP67, and IP68 (5 bar) assemblies when correctly torqued. |
|
Chemical Resistance |
Resistant to petroleum-based oils, hydraulic fluids, and industrial lubricants. |
|
Engineering Files |
2D and 3D CAD drawings (STEP / IGES formats) available for direct download to support enclosure design integration. |
Product Options & Standard Size Chart
Material Compounds: Standard NBR, Hydrogenated Nitrile (HNBR) for higher thermal resistance, or Silicone for extreme low temperatures.
Color: Standard black; custom colors available upon request for identification.
|
Thread Size |
Inner Diameter (ID) |
Outer Diameter (OD) |
Thickness |
|
M12 x 1.5 |
12.2 mm |
18.0 mm |
1.5 mm |
|
M16 x 1.5 |
16.2 mm |
22.0 mm |
1.5 mm |
|
M20 x 1.5 |
20.2 mm |
26.0 mm |
1.5 mm |
|
M25 x 1.5 |
25.2 mm |
32.0 mm |
2.0 mm |
|
M32 x 1.5 |
32.2 mm |
40.0 mm |
2.0 mm |
|
M40 x 1.5 |
40.2 mm |
50.0 mm |
2.0 mm |
|
PG9 |
15.2 mm |
19.0 mm |
1.5 mm |
|
PG13.5 |
20.4 mm |
24.0 mm |
1.5 mm |
Applications
Electrical Control Panels: Sealing entry points on metal and non-metallic industrial enclosures.
Junction Boxes: Outdoor and marine electrical distribution boxes.
Machinery & Automation: Protecting wiring entry points on CNC machines, conveyor systems, and robotic cells.
HVAC Equipment: Outdoor air handling units and compressor control cabinets.
OEM & ODM Customization
Non-Standard Dimensions: Custom ID, OD, and thickness cut to match proprietary gland designs.
Compound Formulation: Tailored NBR mixes for specific chemical exposure requirements (e.g., increased ozone or fuel resistance).
Bulk Packaging: Bagged in specific counts (e.g., 100 pcs/bag) with custom barcoded labeling for distributors and OEMs.
Quality Control & Manufacturing
In-House Compounding & Molding: Compression and injection molding utilizing automated presses to ensure consistent density and zero flash.
Dimensional Inspection: Optical sorting and profile projector checks verifying inner/outer diameters and thickness tolerances within ±0.1 mm.
Physical Testing: Lot testing for tensile strength, elongation at break, and compression set per ASTM standards.
Traceability: Material batch numbers recorded for every production run; RoHS, REACH, and Material Test Reports (MTR) provided on request.
Frequently Asked Questions
Q: How do I select the correct washer size for my cable gland?
A: Match the inner diameter of the washer to the nominal thread size of your cable gland using the dimension chart above (e.g., M20 gland requires an M20 washer).
Q: Are these washers resistant to cutting oils and coolants?
A: Yes. Standard NBR provides excellent resistance to mineral oils, cutting fluids, and general industrial greases.
Q: What is the recommended compression rate during installation?
A: Optimal sealing occurs at 25% to 30% compression under the gland locknut to prevent gasket extrusion.
Q: Can these washers be used in outdoor UV-exposed installations?
A: Standard NBR has moderate UV resistance. For prolonged direct sunlight exposure, EPDM or HNBR variants are recommended.
Q: What is the minimum order quantity (MOQ) for custom sizes?
A: MOQ for non-standard dimensions typically starts at 5,000 pieces, depending on tooling availability.
Q: What documentation accompanies bulk shipments?
A: Each shipment includes a Certificate of Compliance (CoC), packing list, and material data sheet.
Request a Quote
To receive a formal quotation, please provide the following details:
Thread Standard & Size (e.g., Metric M20, PG13.5)
Inner Diameter, Outer Diameter, and Thickness (if non-standard)
Quantity Required (per order / annual forecast)
Application Environment (temperature extremes, chemical exposure)
Special Requirements (custom packaging, specific material certifications, CAD requirement)
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