Threaded Plugs
Threaded Plugs, also known as plastic threaded protection plugs, hydraulic plugs or threaded pipe plugs, are essential components used to seal and protect threaded holes across a wide range of industrial and commercial applications. Widely used throughout the manufacturing, automotive, hydraulics, pneumatics and engineering industries, these pipe plugs help prevent contamination, moisture ingress, corrosion and mechanical damage during storage, transportation, machining and assembly.
Our comprehensive Threaded Plug range includes both standard Threaded Plugs and Threaded Sealing Plugs, providing solutions for applications requiring either general thread protection or liquid-tight sealing. Compatible with BSP, UNF and Metric thread types, the range covers sizes from M8 to M42, 1/8" to 3" BSP and 5/16"-24 to 2 1/2"-12 UNF. Standard Threaded Plugs are manufactured from durable LDPE and are available in bright colours such as red and yellow for easy identification, whilst our Sealing Plugs are manufactured from robust HDPE and feature integrated nitrile O-rings to provide reliable liquid-tight and airtight sealing for hydraulic, pneumatic and fluid handling applications.
For non-threaded holes and panel openings, we also stock our range of Blanking Plugs, offering secure push-fit protection across a variety of panel and enclosure applications.
Key Features and Benefits:
- Comprehensive range including standard Threaded Plugs and Threaded Sealing Plugs
- Compatible with BSP, UNF and Metric thread standards
- Protects threaded holes from dirt, dust, moisture and corrosion
- Threaded Sealing Plugs feature integrated nitrile O-rings for liquid-tight sealing
- Manufactured from durable LDPE or HDPE depending on application requirements
- Simple installation and removal using ergonomic hand, screwdriver or socket drive designs
- Available in a wide variety of thread sizes and highly visible colours for easy identification
Common Use Cases:
- Protecting threaded holes during manufacturing, transport and storage
- Sealing hydraulic and pneumatic ports during servicing or shipping
- Preventing contamination inside pipework, valves and fluid systems
- Providing temporary liquid-tight seals during maintenance or pressure testing
- Safeguarding threaded components in automotive, engineering, oil & gas and industrial applications
Call Vital Parts:
For quick quotes, custom sizes or bulk discounts, call our sales line on 01233 713 581. Businesses can register for a Vital Parts Business Account to benefit from trade pricing, free product samples, credit accounts and a dedicated account manager.
Frequently Asked Questions
Threaded Plugs are typically manufactured from durable LDPE (Low-Density Polyethylene), providing excellent impact resistance, flexibility and protection against moisture and many industrial chemicals.
Yes. Threaded Plugs are commonly used as hydraulic plugs to seal hydraulic ports and fittings during manufacture, servicing, storage and transportation, preventing contamination from entering sensitive hydraulic systems.
Yes. Threaded Plugs feature ergonomic heads that allow quick installation and removal by hand, making them suitable for fast-paced manufacturing and maintenance environments.
Yes. By sealing threaded holes against moisture, dust and contaminants, Threaded Plugs help reduce the risk of corrosion and protect precision threads from damage.
Standard Threaded Plugs are primarily designed to protect threaded holes from contamination and damage, whilst Threaded Sealing Plugs are manufactured with additional sealing features to provide a tighter seal against liquids, gases or pressure.
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If you're new to our website you may want to check out our frequently asked questions section for answers to common customer queries.
While browsing the website you may come across abbreviations used for material names that you are unfamiliar with. You can find an explanation for these in our material abbreviations guide.