Blanking Plug | Waterproof Thread Sealing Stopper | Metric & PG

Brass Waterproof Blanking Plug, Metric and PG Thread Size Options, Thread Sealing Stopper for Blocking Unused Holes on Electrical Cabinets & Equipment Housings

    Buy   3      pieces get   2%  off
    Buy   6      pieces get   3%  off
    Buy  10     pieces get   4%  off
    Buy  20 +  pieces get   5%  off

Brass blanking plugs are also called thread sealing stoppers, specially designed to seal and block redundant threaded holes on electrical enclosures, control boxes, machine casings and junction boxes. Available with standard Metric and PG thread specifications to match the common opening sizes of cable glands, filling idle holes effectively to maintain the original IP waterproof and dustproof rating of equipment shells.
Our blanking plugs are constructed from solid brass with uniform nickel plating as standard surface treatment. The nickel-plated brass body delivers excellent oxidation and corrosion resistance, stable structural hardness and tight thread fit, not easy to rust under normal indoor and general industrial working conditions. Cooperated with built-in rubber sealing gasket, the plug forms a fully sealed structure after screwing tightly, stopping moisture, dust, oil mist and debris from penetrating into equipment interiors.
These thread stoppers feature standard precision threads for smooth installation and disassembly. They will not slip or loosen during long-term equipment operation, vibration or temperature changes. Widely used to seal unused cable gland openings in automation cabinets, power distribution boxes, mechanical equipment, lighting housings and marine electrical devices.

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Refund if items damaged
Refund if no delivery in 35 Business days
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Are you a factory or a trading company?

A: We are a professional manufacturer with our own factory.

A: Most standard products are in stock for fast shipping.

A: We do not provide free samples, but you can order directly online.

A: We accept customization, but a minimum order quantity is required. Please contact us for details.

A: Most of our products have CE and RoHS certifications. Some products also have UL certification.

Our Story: CYD – Connect Your Dreams

At CYD, we believe every connection has a purpose — a spark that brings ideas to life. Our journey began with one mission: to provide dependable, high-performance cable terminals that make building, repairing, and creating easier and safer for everyone.

 

Engineered for Excellence

From the beginning, we’ve committed ourselves to the highest international standards. Every product we create — whether for industrial machines, automotive systems, or home wiring — reflects our dedication to safety, efficiency, and stability. With certifications including CE, UL, ISO,and RoHS, our quality speaks for itself.

 

Built on Trust, Driven by Innovation

CYD’s experienced engineering team continuously develops new solutions to meet the evolving needs of customers across the globe. We’re not just manufacturers — we’re problem solvers. By combining smart design with practical functionality, we help our customers build stronger, more reliable electrical systems.

 

From Local Expertise to Global Reach

Today, CYD terminals and connectors are trusted by professionals and DIYers in the EU, United States, Russia, and beyond. Our products serve as the invisible link powering countless innovations — and we’re proud to be part of that process.

 

CYD – Connect your dreams

Whether it’s a workshop project or an industrial installation, we’re here to help you bring your ideas to life — one connection at a time.

 

Looking Forward, Together

We see every customer not just as a buyer, but as a partner. That’s why we provide not only reliable products, but also responsive service and fast global shipping. As we grow, our promise stays the same: to help you move forward with confidence, quality, and the right connection.

Section view drawing of threaded blank plug, marked D1 thread diameter, D2 cap diameter, H1 thread height, H2 overall height structural size definition
Brass sealing stopper parameter chart, complete M thread and PG thread model with precise D1 D2 H1 H2 millimeter dimension data for selection reference

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