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Round Plastic Metric Threads

 (24 product groups)

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Allen Screw Caps

These Allen Screw Caps are used to conceal and protect Allen head screws from ingress of dust, dirt, corrosion and damage. It can also help enhance the aesthetic appearance of the assembly by covering their heads.

Quick and easy to install or remove. It can help reduce noise and vibration by providing a more secure fitting to the screws. They are used in industries such as electronics or furniture.

  • Material: LDPE
  • Colour: Black


Series Code :SR1805

Banjo Bolt Caps

A Protection Cap and Retaining Washer in a single unit. These Banjo Bolt Caps hold everything together during assembly, storage and shipping.

A highly versatile cap that will protect your application against damage and the ingress of dirt. The product is also supplied with bridged retaining loops. The caps are easy to grip, even when wearing gloves and are available in a choice of sizes to suit your project needs.

  • Material: Low-Density Polyethylene (LDPE)
  • Colour: Black


Series Code :SR1083

Bolt Protection Caps

Bolt Protection Caps conceal and protect bolt heads and nuts against weathering. Ideal for bolt heads, screw heads and nuts. They create an enhanced finished appearance and are a great choice for outdoor applications.

This range is supplied in a wide choice of sizes to suit multiple applications.These caps are available to fit over common Imperial UNF, Metric ISO 4017 or DIN 933 standard bolts.

Available in a variety of colours.

  • Protects joint fasteners against tampering and weathering.
  • Creates an enhanced finished appearance for your application.
  • Great choice for outdoor applications.
Material: LDPE Colour: Black, Green, Brown, Grey, White Series Code: SR1802, SRF0074

Collar Plugs

Collar plugs feature a self tapping design which makes them easy to install. Very durable due to their thick wall, they are difficult to dislodge and offer a secure connection.

Designed to protect your equipment from dust, debris and other external elements. Ideal for sandblasting and other applications in the construction and automotive industries.

  • Material: LDPE
  • Colour: Orange


Series Code :SR1160

Easy Pull Masking Caps

Easy Pull Masking Caps provide optimum protection for end tip profiles, such as rods, pipes and tubes during manufacturing processes. Typical applications include; anodizing, blasting, powder coating, e-coating, plating and general paint lines.

This range has several style options, include a range with a flanged design and an internal seal that provides a secure fit or options that feature an ergonomic finger pull-tab for easier removal.

These caps are easy to fit; to ensure the best possible fit, the inside diameter dimension should be approximately 10 percent smaller than the outside diameter of the part being masked.

Our range is available in different material options with various beneficial properties. Silicone is a premium masking material with high temperature and chemical resistance. EPDM is a more economical material option with lower heat resistance. Both Silicone and EPDM options can be used multiple times. Whereas, Soft PVC is a more economical solution also with chemical resistance, a reduced heat resistance and is for one-time uses.

  • Materials: Silicone Rubber 600F (316C) EPDM 425F (218C) and Soft Polyvinyle Chloride (PVC) 425F (218C)
  • Colours: Natural, Black and Yellow
  • Hardness: Durometer (Shore A) 55 + 5 and 85 +/–2


Series Code :SR1096, SR6119, SR5755, SR1066

Ezeplugs

Ezeplugs are used to seal and secure threaded holes. They include a central or lateral pull tab that allows them to be easily inserted and removed from threaded holes. Several sizes are available to protect over 25 different imperial and metric thread sizes. It protects against damage, dirt, moisture, and corrosion during storage and shipping.

It is simple to install with the patented quick-fit design and locks the plug in place with a simple push. It also has a sturdy and flexible pull tab that makes removing it easy. Used in various applications, including industrial machinery, control panels, electrical panels, and other equipment.

  • Material: LDPE
  • Colour: Red


Series Code :SR1055

Flanged Caps

Flanged Caps are designed for easy assembly and removal, either with automated equipment or by hand. Typically used to protect metric or imperial threads, with or without O-Rings. The larger flange allows for faster application and removal when using it by hand.

For the purpose of quality control; the natural coloured caps allow you to see through the cap and check whether the O-ring is installed, or not installed, on the protected fitting.

Provides a snug and secure fit.

  • Designed to cover and protect threads.
  • Protects from damage, dirt, and moisture.
  • Used in the automotive and engineering industries.
Material: Silicone, LDPE, TPE, TPR Colour: Grey, Natural, Yellow, Clear, Pink, Red, Black Series Code: SR5754, SR1024, SRCTLTPE, SR1116, SR1124, SR1025, SR1026

Flexible Vinyl Pull Tab Caps - High Temp

High Temperature Flexible Caps with an ergonomic-friendly pull-tab design for easy fitting and removal. Suitable for use on threaded or plain applications.

The unique design fits a range of applications and thread sizes including Metric, UNF and BSP. The range includes options with a six-sided design.

  • Pull-tab design.
  • Unique design allows each cap to fit a wide range of diameters.
  • Easy fitting and removal.
Material: Flexible PVC Colour: Yellow Series Code: SR1072

High Temperature Tapered Plugs

This range of high temperature masking plugs features Silicone Rubber Tapered Plugs, EPDM Tapered Plugs and other Tapered Rubber Plugs made from Thermoplastic Rubber (TPR).

This extensive range of Tapered Plugs is available as a solid plug or with a hollow core, to aid in compression. Solid and hollow core options are available in our EPDM and High Temperature Silicone Plugs ranges. The hollow centre provides a cost-effective solution for larger sizes. The hollow design is more flexible than solid plugs, and allows for easier application.

Our Tapered Rubber Plug range features Univesal Plugs made from TPR. The tapered plug is designed to mask holes without masking the surrounding areas, and a pull tab allows for easy installation and removal. Suitable for temperatures up to 125C.

  • Colours: Black, Blue, Green, Natural, Pink, Red and Yellow
  • Simple push-fit design

Masking Pull Plugs

Masking Pull Plugs, also known as silicone masking plugs, are plugs used to mask threaded and non-threaded holes. They resist chemicals, dust, dirt, temperature changes, and abrasion. Furthermore, the pull tab simplifies installation and removal, allowing for smooth insertion and a secure fit that avoids undesired leaks or seepage.

The reusable material used in these plugs allows for various uses, reducing the need for frequent replacements and contributing to waste reduction. They can resist temperatures of up to 250 degrees Celsius and are used in various applications, including powder coating, sealing, automotive assembly, and electronics production.

  • Material: Silicone, EPDM, Silicone Rubber, TPR
  • Colour: Natural, Black, Clear, Red, Grey, White, Purple, Green, Pink, Orange, Yellow, Blue


Series Code :SR1057, SR1094, SR6118, SR6117, SRF0060, SR5750, SR5749, SR5752, SR1028

Masking Washer Plugs

These High Temperature Washer Plugs are used to mask the surface around a threaded or plain hole, with an integrated washer and plug that allows them to function as a single item. They are long-lasting and resistant to chemicals, temperature changes, and abrasion.

These plugs are simple to install and remove, and their design assures a snug fit, a secure seal, and the prevention of leakage or contamination. They can withstand high temperatures of up to 250 degrees Celsius and are used in various applications such as powder coating, painting, plating, sealing, automotive assembly, and electronics manufacturing.

  • Material: Silicone, EPDM
  • Colour: Grey, Natural, Black, Clear, White, Dark Green, Yellow, Pink, Purple, Red


Series Code :SR1065, SR1092, SR5753

Pull Tab Caps

Pull Tab Caps are designed to protect applications from contamination and spillages. The pull tab design provides more surface contact area, requiring less gripping force during installation and removal.

The tabs are particularly usefull in applications requiring fast removal during mechanical process and for this reason are a popular choice across various industries.

The flexibility of the materials used allows for a tight fit on to applications. The addition of the tab makes them an essential selection.

  • Designed to protect from contamination and spillages.
  • Flexible design means it can strech on to slightly larger dimensions for a snug fit.
  • Used in the food industry, industrial applications, or storage applications.
Material: LDPE, EVA, PVC Colour: Yellow, Black, Red Series Code: SRQCF, SR6110, SR1066

Push-In Plugs

Push-in Plugs are a practical choice for blanking a wide range of holes or bores during manufacturing processes or transportation, and can be applied to finished products. Designed to shield the handler from rough surfaces caused by sharply cut hole edges. The varied styles available in our range can also be used to protect against ingress of contaminants.

They are simple to install and uninstall with a single push. Used in various applications, including medical, automotive, food and beverage, and industrial machinery.

Protects against damage, dirt, moisture, and corrosion.

  • Shields the handler from rough surfaces caused by sharply cut hole edges.
  • Used in various applications, including medical, automotive, food and beverage, and industrial machinery.
  • Protects against damage, dirt, moisture, and corrosion.
Material: LDPE Colour: Natural, White, Black Series Code: SR1011

Snap-on Bolt Caps

Bolt Caps with a simple and convenient snap-on design are a cost effective options that can be used to cover exposed screw, nuts, washers and bolts.

They improve the finished appearance, while providing protection against dirt, damage and long-term exposure to the surrounding environment.

Our range features two type options; Type 1 can be used to protect bolts, screws and nuts and Type 2 protects a washer in addition to the bolts, screws and nuts. Available to fit various bolt thread sizes - you are sure to find an option for your application.

  • Material: Low-Density Polyethylene (LDPE)
  • Colour: Black

Socket Screw Cover Caps

These Socket Screw Cover Caps cover and protect socket head screws from dust and dirt, while providing a quick and clean finish to internal hex screws.

Commonly used for the inside of UPS boxes when high voltage cables pass close to metal screw heads, which occurs when space is limited. The cap can be applied in order to prevent interference between the two, as the screw head needs to be isolated. They are also used in appliances, electrical applications and automotive.

  • Material: Silicone, LDPE
  • Colour: Black, White, Grey


Series Code :SR1628, SR1813

Soft Knurled Caps

Soft Knurled Caps are a simple and economical way of protecting metric and UNF threads during painting, assembly or transportation. They have a knurled exterior and are manufacured from a soft, durable TPE that provides a better grip and a tight fit. Protects pipe ends from damage, and keeps dirt and debris out.

Easy to install and remove. They can operate in a temperature from -60 C up to 135 C.

Commonly used in plumbing, HVAC, and industrial applications.

  • Simple and economical way of protecting metric and UNF threads.
  • Easy to install and remove.
  • Operatures in temperatures from mimimum -60 C up to maximum 135 C.
Material: TPEColour: BlueMaterial Flammability Standard: Series Code: SRF0010

Tapered Caps & Plugs - Standard

Standard Tapered Caps and Plugs are versatile components designed for use as a plug or a cap. The tapered profile allows the part to plug multiple inner diameters or to cap multiple outer diameters.

These dual function plugs or caps are typically used to protect against damage, dirt, moisture, and other corrision during storage and shipping.

With a straight forward push fit design, these dual function components are easy to insall and remove. The extensive range offers a varied selection of sizes that range from 2.9 mm up to 345.0 mm.

  • Plug design suitable for multiple inside and outside diameters.
  • Protects threaded and non-threaded pipes, ports, and access points against damage, dirt, moisture, debris, and corrosion.
  • Suitable for use in hydraulic systems, automotive components or medical industries.
Material: LDPE Colour: Red, Blue, Black, Clear, Yellow Series Code: SR1000, SR1111, SRF0020

Tear Tab Caps

Tear Tab Caps are a standard, off-the-shelf solution that will allow you to meet your customers demands without those all too common time delays.

Tear Tab Caps are quick-fit and quick-release caps. As a rapid solution, they can be easily fitted and removed across an array of applications, including; critical hydraulic tubes and pipes, such as those that carry oils and other fluids around vehicles and machineries. This makes them an ideal choice for the specialist vehicle manufacturing industry, and other automotive and manufacturing sectors.

Tear Tab Caps also assist in the protection of tube and pipe ends during transportation and storage. They protect parts from damage, dirt, moisture and other forms of ingress. These caps are highly versatile, and ideal for a range of applications and different threads, including; BSP, GAS, UNF, JIC and NPT.

Made from Low Density Polyethylene (LDPE), the caps feature a simple tear-away tab for quick release, and fast removal. The ease of extracting the Tear Tab Cap from the hydraulic pipework makes the removal process faster. By simply pulling the tab, the cap splits open, tearing away.

The LDPE material is tough and flexible. They provide many of the advantages of PVC caps, such as integrity and cleanliness.

  • Colours: Blue, Natural and Yellow
  • RoHS Compliant


Series Code :SR1022, SR1033

Threaded O-ring Plugs - Metric Threads

Threaded O-ring Plugs for metric threads include a compressed flange lip and an O-ring to provide a watertight seal, for a superior leakage prevention, for hydraulic threaded fittings. Provides a tight seal and therfore prevents contaminant ingress from dirt, dust, debris, and moisture out of the aperture.

Can 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.Commonly used on hydraulic fittings, oil and gas, plumbing, and automotive sectors where leak-proof seals are crucial to system integrity.

  • Keeps contaminants like dirt, dust, debris, and moisture out of the hole.
  • Metric threads are available with a cylindrical inner and outer diameter precise in millimetres.
  • Used in oil and gas, plumbing, and automotive sectors.
Material: HDPE Colour: Yellow Material Flammability Standard: UL94 V-2, Series Code: SR1125

Threaded Protection Caps - Metric Threads

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


Series Code :SR1161, SR1018, SRF0015

Threaded Protection Plugs - Metric Threads

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


Series Code :SR1002

Threaded Sealing Caps - Metric Threads

These Threaded Sealing Caps for Metric 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 cap is fitted with an internal neoprene rubber sealing disk to limit fluid leakage, plus it reduces potential shearing. The protection plug protects from contaminants like dirt, dust, debris, 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 or socket at low torque. They are suitable to protect metric threads and are used in various applications, including hydraulic, pneumatic and general engineering industries.

  • Material: HDPE
  • Colour: Yellow
  • Series Code: SR1126

Unicap Cover Caps

Unicap Cover Caps and washers are designed to conceal and protect exposed screws or bolt heads for aesthetic or safety reasons. These caps and washers are resistant to corrosion, abrasion, and impact due to their material, offering long-lasting protection and durability.

In addition, they protect against dirt and are easy to install and remove by push fit. Available in both low profile and high profile. Used in construction, furniture and appliances.

Please note that in this product range you will find caps and washers which are sold separately and you will need to order both items.

  • Material: PP, HDPE, LDPE
  • Colour: Grey, Silver, Black, White, Natural, Flint, Brown, Stone, Beige, Gold, Orange


Series Code :SR1801

Uniscrew Caps

Uniscrew Caps are intended to fit into the screw hole for a seamless, flush look. Their function is to conceal the screw heads, which can accommodate most sizes. These caps are connected to a washer by a hinge that folds neatly when inserted into the cap.

The durable material protects against damage, dirt, moisture and corrosion during storage and shipping. They are easy to install simply by push fit and are often used in furniture assembly, automotive interiors, and electrical equipment.

  • Material: PP
  • Colour: Black, White


Series Code :SR1807