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Hydraulic Application Caps & Plugs

 (43 product groups)

What are hydraulic application caps and plugs used for?

Hydraulic application caps and plugs provide the critical role of protecting hydraulic systems from dirt, moisture, corrosion and damage during manufacturing, transit, shipping and storage. All of which can be harmful factors contributing to hydraulic system failure. Hydraulic caps and hydraulic hose plugs should be used through various processes such as manufacturing – particularly in powder coating and painting, during assembly and packaging and also used during machine shutdown when undertaking routine maintenance or repair. Their job is to prevent all types of contaminant from entering hydraulic systems through ports and fittings.

Thread types in our range include:

UNF
BSP
Metric
JIC threads

For more information about hydraulic line caps and plugs, hydraulic hose caps, fittings and other important products, visit our ‘How to choose caps and plugs guide.

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Anti-Vibration Plugs - LDPE

In stock In production

Anti-Vibration Plugs are designed to to be a reliable and efficient solution for reducing and dampening vibrations. It is used with BSP hydraulic fittings and has excellent resilience, shock absorption, and resistance to chemicals and solvents.

They have a serrated design that prevents loosening from vibration while retaining a firm grip on the pipe collar. They are easy to install and remove and, due to their transparency, can be inspected by the O-ring. Used in industries such as machinery, electronics, and automotive.

  • Material: LDPE
  • Colour: Clear

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Hose Washer Caps

In stock In production

Hose Washer Caps are applied on the hose and tube ends to prevent them from sliding over the fittings. It features a tight-fitting design that helps to prevent water, dust, dirt and other contaminants from getting into the hose.

They are simple to install and remove and provide an airtight seal to maintain the integrity of the hose connector. It is used in construction applications, gardening, and the automotive industry.

  • Material: TPE, LDPE
  • Colour: Black, Yellow

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Round Vinyl End Caps

In stock In production

"Push Fit Round Vinyl End Cap are a versatile and practical accessory that provides a clean and finished look to the ends of various cylindrical objects.

Designed to fit securely over ends of round or cylindrical tubes, rods, or pipes. It offers protection, durability and is resistant to impact, abrasion, and weathering.

The glossy and attractive finish makes this cap ideal for use as a decorative end cap. It also acts as protective barriers, shielding the ends of tubes or rods from moisture, dust, dirt, and other contaminants.

Material: Polyvinyl Chloride (PVC)Colour: Black, Red

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Tapered Caps & Plugs - Standard

In stock In production

Standard Tapered Caps & Plugs protect threaded and non-threaded pipes, ports, and access points during storage and transit against damage, dirt, moisture, debris, and corrosion. Designed to allow the part to plug multiple inside diameters or outside diameters.

Easy to install and remove due to their threaded and smooth connectors. They are an excellent solution for installation in hard to reach places; apply to threaded holes and have six ribs on the shank for a more secure fit. They are designed to provide high security and are suitable for use in hydraulic systems, automotive components or medical industries.

  • Material: LDPE
  • Colour: Blue, Red, Black, Yellow, Clear

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Gas Cylinder Valve Plugs

In stock In production

Gas Cylinder Valve Plugs have been developed in collaboration with major European gas companies to protect industrial gas valves from the ingress of dust, dirt and other contaminants. It provides a tight seal, while its unique vent cap allows for the safe release of gas after accidental opening of the valve.

It is easy to install and disassemble, making it a convenient solution for temporary applications and tamper-proof. It is used in gas storage, industrial and transportation applications.

  • Material: HDPE, LDPE
  • Colour: Yellow

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Tapered Caps & Plugs - Wide Flange

In stock In production

Wide Flange Tapered Caps & Plugs provides a greater protection to threaded and non-threaded pipes, ports, and access points during storage and transit against damage, dirt, moisture, debris, and corrosion. Designed to allow the part to plug multiple inside diameters or outside diameters.

Easy to install and remove due to their threaded and smooth connectors. Wider flange provides greater support for bearing surfaces and prevents the plug from being accidentally pushed down through the contact piece. Suitable for use in hydraulic systems, automotive components, chemical or medical industries.

  • Material: LDPE
  • Colour: Blue, Red

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Tube End Caps

In stock In production

Tube End Caps offer ideal protection for threaded or non-threaded tubing, pipes and rods. Standard, short and long caps are available. The short versions are for general purpose closure and the long versions have an extra depth and feathered edge that ensure a tight fit.

The design of these longer caps helps to prevent accidental displacement. Tube End Caps serve the same purpose as Heat Shrink End Caps, but do not shrink when heated during the application process. They are UV and weather resistant, making them ideal outdoor applications.

  • Material: Polyvinyl Chloride (PVC), Low density polyethylene (LDPE)
  • Colour: Red

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Tapered Caps & Plugs - Heavy Duty

In stock In production

Tapered Caps & Plugs protect threaded and non-threaded pipes, ports, and access points from damage, dust and debris during storage and shipping. They have a heavy duty wall and a tapered sealing ring for maximum protection.

Heavy duty tapered caps and plugs are designed to provide extra protection and durability where standard caps and plugs would not suffice. It provides a secure seal by push fit, excellent durability, and resistance to impact and abrasion. Used for applications in machinery, automotive, and industrial.

  • Material: LDPE
  • Colour: White, Red

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Slottex Plugs

In stock In production

Slotted Plugs are designed with a double sealing ring on the underside of the flange to provide a secure and reliable seal. They protect from contaminants like dirt, dust, and debris, not trapping liquid and moisture from the hole.

It is easy to install and remove by hand, but its hex head allows the plug to be applied or removed with a spanner, Allen key or socket. The range covers an extensive offering of dimensions suitable for Metric, BSP, and UNF threads. Used in various applications, including hydraulic, pneumatic and general engineering industries.

  • Material: PA, PE
  • Colour: Yellow, Blue

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Standard Round End Caps

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Standard Round End Caps are used to securely protect threaded or non-threaded tubing, pipes, and rods during transportation, a paint process or on a finished product. It prevents dirt, debris, dust and other contaminants from damaging the tubes.

These caps are easily applied by pushing onto the application and can be re-used upon removal. They are used for industrial, HVAC, and plumbing applications and can withstand temperatures up to 70C.

  • Material: LDPE
  • Colour: Natural, Red

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Snap Fit Plugs

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These Snap Fit Plugs are designed to provide a finished and professional appearance to the surface while protecting the hole or opening from damage and debris.

Easy to install and remove, once pushed into position, a single twist provides a tight, snug fit, and a central tab at the top provides a strong grip for tightening and removal. The range is suitable for Metric, BSP and UNF threads. Used in electrical and automotive applications.

  • Material: LDPE
  • Colour: Red, Black

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Ribbed Pipe End Caps

In stock In production

Ribbed Pipe End Caps are ideal for protecting threaded or non-threaded pipes, tubes or rods. In addition it is used to shield or mask areas during the painting process, as well as preventing dirt, dust, or debris from entering.

It is easy to install and remove, and it can withstand a maximum temperature of 79.4C. Designed for plumbing, HVAC, and industrial applications.

  • Material: LDPE
  • Colour: Red, Yellow

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Threaded O-ring Plugs - BSP/Gas Threads

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Threaded O-ring Plugs for BSP/Gas Threads include a compressed flange lip and an O-ring to provide a watertight seal and superior leakage prevention for hydraulic threads. The threaded O-ring keeps contaminants like dirt, dust, debris, and moisture out of the hole.

It may be installed using a spanner, screwdriver, or by hand. BSP Gas threads are available. Used in oil and gas, plumbing, and automotive sectors where leak-proof seals are crucial to system integrity.

  • Material: HDPE
  • Colour: Yellow
  • Material Flammability Standard: UL94 V-2

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Threaded O-ring Plugs - Metric Threads

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Threaded O-ring Plugs for Metric Threads include a compressed flange lip and an O-ring to provide a watertight seal and superior leakage prevention for hydraulic threads. The threaded O-ring keeps contaminants like dirt, dust, debris, and moisture out of the hole.

It may be installed using a spanner, screwdriver, or by hand. Metric threads are available, with a cylindrical inner and outer diameter precise in millimetres. The fine taper of metric tapered thread allows for the best possible force transmission. Used in oil and gas, plumbing, and automotive sectors where leak-proof seals are crucial to system integrity.

  • Material: HDPE
  • Colour: Yellow
  • Material Flammability Standard: UL94 V-2

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Round End Caps - Standard

In stock In production

Standard Round End Caps are non-threaded and available in a wide range of sizes. They are ideal for protecting threaded or non-threaded tubing, pipes and rods. Standard, short and long caps are available. The short versions are for general purpose closure and the long versions have an extra depth and feathered edge which ensure a tight fit. The design of these longer caps helps to prevent accidental displacement.

  • Material: PE, PP
  • Colour: Yellow, Black, Grey, Natural

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Threaded O-ring Plugs - UNF Threads

In stock In production

Threaded O-ring Plugs for UNF Threads include a compressed flange lip and an O-ring (optional) to provide a watertight seal and superior leakage prevention for hydraulic threads. The threaded O-ring keeps contaminants like dirt, dust, debris, and moisture out of the hole.

It may be installed using a hex wrench, screwdriver, or hand. Often used on flat-faced hydraulic fittings, it is recommended when strength and resistance are desired as it can withstand temperatures that range from -40F to 230F | -40C to 110C. Used in oil and gas, plumbing, and automotive sectors where leak-proof seals are crucial to system integrity.

  • Material: PP, HDPE
  • Colour: Yellow, Black, Red
  • Material Flammability Standard: UL94 V-0

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Threaded Protection Caps - BSP/Gas Threads

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Threaded Protection Caps for BSP/Gas Threads protect threads and fittings from damage during production, storage, and shipment, ensuring they remain in good condition and ready for use when needed. The protection cap keeps contaminants like dirt, dust, debris, and moisture out of the hole.

Features a knurled head design that makes them easy to install and remove by hand by twisting them onto the pipe or tube. Used in various applications, including hydraulic and pneumatic systems, automotive, and industrial applications.

  • Material: LDPE, HDPE
  • Colour: Red, Yellow

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Threaded Protection Caps - Metric Threads

In stock In production

Threaded Protection Caps for Metric Threads threads and fittings protect threads and fittings from damage during production, storage, and shipment, ensuring that they remain in good condition and are ready for use when needed. The protection cap keeps contaminants like dirt, dust, debris, and moisture out of the hole.

Features a knurled head design that makes them easy to install and remove by hand by twisting them onto the pipe or tube. Suitable for Metric threads. Used in various applications, including hydraulic and pneumatic systems, automotive, and industrial applications.

  • Material: HDPE, LDPE
  • Colour: Yellow, Red, Natural

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Threaded Protection Caps - UNF/JIC Threads

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Threaded Protection Caps for UNF /JIC Threads protect threads and fittings from damage during production, storage, and shipment, ensuring that they remain in good condition and ready for use when needed. The protection cap protects flared and flare less from contaminants like dirt, dust, debris, and moisture out of the hole.

Features a knurled head design that makes them easy to install and remove by hand by twisting them or pushing them in on the pipe or tube. They are ideal for UNF/JIC threads, and if you pick the yellow option, they are made of HDPE and have a long profile, which allows for more threading turns. It can withstand temperatures between Min. -30C, Max. +80C. The range of Protection caps can be used in various applications, including hydraulic and pneumatic systems, automotive, and industrial applications.

  • Material: Nylon, HDPE, LDPE
  • Colour: Red, Yellow

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Non-Threaded End Caps

In stock In production

Non-threaded End Caps are ideal to securely protect threaded or non-threaded tubing, pipes and rods. It prevents leaks and keeps out dirt, debris and other contaminants.

They are quick and easy to install and remove. It can be used for plumbing, HVAC, and industrial applications. Temperature resistant to 95C maximum.

  • Material: LDPE
  • Colour: Blue

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Threaded Protection Plugs - BSP/Gas Threads

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Threaded Protection Plugs for BSP/GAS Threads protect threads and fittings from damage during production, storage, and shipment, ensuring that they remain in good condition and ready for use when needed. The protection plug protects from contaminants like dirt, dust, debris, and moisture out of the hole.

Features a knurled head design that makes them easy to install and remove by hand by twisting them onto the pipe or tube. Used in various applications, including hydraulic, pneumatic and general engineering industries.

  • Material: LDPE
  • Colour: Red

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Threaded Protection Plugs - Metric Threads

In stock In production

Threaded Protection Plugs for Metric Threads protect threads and fittings from damage during production, storage, and shipment, ensuring they remain in good condition and ready for use when needed. The protection plug protects from contaminants like dirt, dust, debris, and moisture out of the hole.

Features a knurled head design that makes them easy to install and remove by hand by twisting them or onto the pipe or tube. Ideal for Metric thread applications exposed to high fluid flow residue and vibration. Used in various applications, including hydraulic, pneumatic and general engineering industries.

  • Material: LDPE
  • Colour: Red

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Threaded Protection Plugs - NPT Threads

In stock In production

Threaded Protection Plugs for NPT Threads protect threads and fittings from damage during production, storage, and shipment, ensuring that they remain in good condition and ready for use when needed. The protection plug protects from contaminants like dirt, dust, debris, and moisture from the hole.

It may be installed by hand or with a 12-point socket head, screwdriver or wrench. This threaded plug is suggested for usage where strength and abrasion resistance are required since it can tolerate temperatures ranging from -40F to 230F | -40C to 110C. Suitable for Metric threads. Used in various applications, including hydraulic, pneumatic and general engineering industries.

  • Material: HDPE, PA
  • Colour: Red, Natural

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Threaded Protection Plugs - Quick Fit

In stock In production

These Quick Fit Threaded Protection Plugs protect threads and fittings from damage during production, storage, and shipment, ensuring that they remain in good condition and ready for use when needed. The protection plug protects from contaminants like dirt, dust, debris, and moisture from the hole.

It conceals the initial thread of ordinary female threads. It is offered in either Silicone, a reusable high temperature resistant material, or EPDM, a reusable and cost-effective material with less heat but excellent chemical resistance. Its ergonomic pull tab makes it simple to install and remove. Used in various applications, including hydraulic, pneumatic and general engineering industries.

  • Material: LDPE
  • Colour: Red

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Threaded Protection Plugs - UNF Threads

In stock In production

These Threaded Protection Plugs for UNF Threads protect threads and fittings from damage during production, storage, and shipment, ensuring that they remain in good condition and ready for use when needed. The protection plug protects from contaminants like dirt, dust, debris, and moisture from the hole.

It features fewer thread forms for faster application and may be applied or removed with a hand, hex spanner, or screwdriver. Used in various applications, including hydraulic, pneumatic, and general engineering.

  • Material: PP, LDPE, HDPE
  • Colour: Yellow, Black, Red

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