Hex Head Blanking Plug
The Hex Head Blanking Plug seals unused threaded entries in electrical enclosures, junction boxes, and industrial machinery housings. It preserves the enclosure's environmental integrity against dust, moisture, and corrosive agents. Featuring a low-profile hexagonal head, it enables secure tightening with standard tools while providing a flush, professional finish for harsh industrial settings.
Hex Head Blanking Plug | Technical Product Page
The Hex Head Blanking Plug seals unused threaded entries in electrical enclosures, junction boxes, and industrial machinery housings. It preserves the enclosure's environmental integrity against dust, moisture, and corrosive agents.
Featuring a low-profile hexagonal head, it enables secure tightening with standard tools while providing a flush, professional finish for harsh industrial settings.
Engineering Asset: 2D/3D CAD drawings (STEP/IGES formats) are available for immediate download to support design-in phase integration.
Key Features
Positive Sealing: An integrated O-ring (NBR or Silicone) beneath the collar ensures a tight seal against panel surfaces, maintaining up to IP68 protection.
Secure Tool Engagement: Precision-machined hexagonal head allows high-torque application using standard open-end or socket wrenches without slippage.
Corrosion Resistance: Available in nickel-plated brass, stainless steel (AISI 304/316), and engineering plastics to match specific corrosive and chemical environments.
Thread Integrity: Cleanly cut, burr-free threads (Metric, PG, NPT, G) ensure smooth engagement and prevent cross-threading during assembly.
Technical Specifications
|
Specification |
Details |
|
Thread Types |
Metric (ISO), PG (DIN 40430), NPT (ANSI B1.20.1), G / BSPP (ISO 228) |
|
Thread Sizes |
Metric: M12 to M63; PG: PG7 to PG48; NPT: 1/4" to 2" |
|
Body Materials |
Brass with Nickel Plating; Stainless Steel (AISI 304 / 316); Aluminum |
|
Sealing Ring |
NBR (Standard: -40°C to +100°C) / Silicone (High-Temp: -60°C to +200°C) |
|
Ingress Protection |
IP66 / IP68 (5 bar, 30 min) when installed with proper gasket compression |
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Compliance |
RoHS, REACH, CE |
Product Options
Material Variants: Nickel-plated brass for general industrial use; Stainless Steel 316 for marine, chemical, and food processing; PA66 nylon for lightweight electrical cabinets.
Thread Configurations: Full range of standard pitch Metric, PG, NPT, and BSPP threads available directly from stock.
Gasket Options: Standard NBR for general applications; Fluorosilicone or EPDM for extreme chemical exposure or outdoor UV resistance.
Applications
Electrical control panels and switchgear enclosures
Industrial automation machinery and drive housings
Junction boxes in washdown or corrosive environments
Outdoor telecom cabinets and renewable energy inverter housings
Hydraulic and pneumatic distribution manifolds
OEM & ODM Customization
Non-Standard Threads: Custom thread pitches, extra-long thread shanks, or special imperial/unified thread forms machined strictly to customer drawings.
Material Grades: Production runs in specific alloys including Titanium, Monel, or specialized engineering plastics.
Laser Marking: Custom part numbers, company logos, or traceability codes laser-etched directly onto the plug head.
Packaging: Bulk industrial packaging or kitted sets including locknuts and washers tailored for automated assembly lines.
Quality Control & Manufacturing Capabilities
In-House CNC Machining: Advanced multi-axis CNC turning centers maintain thread pitch diameter tolerances within +/-0.02 mm.
Dimensional Verification: Optical comparators and go/no-go thread plug gauges are utilized per production lot to verify thread accuracy and profile.
Leak & Pressure Testing: 100% pneumatic bubble testing or hydrostatic pressure testing conducted on critical batches to verify O-ring seal integrity under load.
Material Traceability: Mill Test Certificates (MTC) and raw material chemical composition reports available upon request.
Frequently Asked Questions
Q: How do I select the correct thread type for my enclosure?
A: Match the plug thread standard to the existing tapped hole or cable gland cutout. Use Metric for IEC standards, NPT for North American equipment, and PG for older European electrical designs.
Q: Are O-rings included with the blanking plugs?
A: Yes, every plug ships with a pre-assembled O-ring sized specifically for the thread diameter to guarantee the rated IP protection.
Q: What is the difference between NBR and Silicone O-rings?
A: NBR is standard for general industrial temperatures (-40°C to +100°C) and oil resistance. Silicone is utilized for wider thermal ranges (-60°C to +200°C) and superior outdoor UV resistance.
Q: Can these plugs withstand high vibration environments?
A: Yes. When tightened to the recommended torque specification and paired with a thread sealant or locknut where required, they resist loosening under continuous mechanical vibration.
Q: What is the standard Minimum Order Quantity (MOQ)?
A: Standard catalog items have an MOQ of 100 pieces per size. Custom machined parts require an MOQ starting at 500 pieces depending on raw material availability.
Q: What is the typical production lead time?
A: Standard catalog items ship within 3 to 5 business days. Custom OEM orders require 15 to 25 business days depending on tooling and plating requirements.
Request a Quote
To receive a formal quotation or request 2D/3D CAD files for Hex Head Blanking Plugs, please provide the following details:
Thread Specification & Size: (e.g., Metric M20x1.5, NPT 1/2")
Material Requirement: (e.g., Nickel-plated brass, Stainless Steel 316)
Quantity Required: (Annual volume or per-order batch size)
Sealing Ring Preference: (NBR or Silicone)
Special Requirements: (Laser marking, custom packaging, or specific test certificates)
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