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Rubber Female Threaded Insert Non Threaded

 (11 product groups)

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Centre Pull Plugs

The Centre Pull Plug easily plugs into a threaded or non-threaded hole. Due to the tapered design, is can be used to plug multiple inner diameters. These plug offers a snug and secure fit that prevents undesired substances from entering the open tube or hole, protecting internal components and ensuring optimal performance.

The integrated centre tab is designed for quick and easy remova, by pulling the tab upwards. The plug protects against damage, dirt, moisture, and corrosion during storage and shipping.

Used in various applications.

  • Tapered design means plug is suitable for multiple inner diameters.
  • The integrated centre tab is designed for quick and easy removal and installation by hand and with a tool.
  • Used in various applications, including electrical cables in machinery, equipment, and control panels.
Material: LDPE, TPR Colour: Yellow, Black, Orange, Red Series Code: SR1174, SR1067, SR1068

Covered Tapered Plugs

Covered Tapered Plugs are designed to ensure a secure fit due to their convex sides and protect from contaminants, debris and damage. It features a push fit style that makes it easy to use and remove.

Used in a variety of applications, including blind holes, pipes, furniture or electrical boxes. They are reusable due to the material from which they are constructed without affecting the effectiveness of the sealing.

  • Material: Silicone
  • Colour: Grey, Yellow, Green, White, Red, Black, Pink, Purple, Blue, Clear


Series Code :SR5751

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

Expandable Masking Covers

Expandable Masking Covers are an ideal alternative to a more conventional cap when the part to cover has an awkward shape. The Masking Covers are expandable by stretching with an elasticated end or by stretching through the elasticity of the material. The elasticated cap makes it a looser hold and therefore is best for a general protection during transport and storage or light masking requirement.

The stretched material cap has a stronger hold on the part by gripping and therefore is best for application putting pressure on the part. Their softening point is at 90 degrees Celsius and they can be used up to 100 degrees Celsius.

  • Material: LDPE, Silicone
  • Colour: Blue, Red, White, Clear


Series Code :SR1097, SRF0019

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

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 Cones

Masking Cone Plugs are a versatile masking solution that can be used as a plug or as a cap. The tapered design allows the part to plug a range of inside diameter sizes and to cap a range of outside diameter sizes. These plugs are ideal for a range of masking applications, including; powder coating, e-coating, plating and anodizing.

The range is available in a choice of materials that include premium Silicone and economical EPDM. Silicone benefits from a high temperature rating and can be used multiple times. EPDM is also reusable with a lower heat resistance, but superior chemical resistance.

  • Materials: Ethylene Propylene Diene Monomer (EPDM) and Silicone Rubber
  • Colours: Black, Blue, Brown, Green, Natural, Red, Rust, Purple and Yellow


Series Code :SR1075, SR1091

Masking Washer Caps

A range of Masking Washer Caps that can be applied as a protective cap for threaded and non-threaded end tip.

Although the product is primarily designed as a cap, the integrated washer masks of grounding and also provides edge protection to ensures that the application hole is safe from contaminants and damage. This highly versatile masking solution can also be inverted and used to plug holes.

  • Material: Silicone (55 Shore A)
  • Maximum Temperature: 316 degrees C (600 degrees F)
  • Colours: Black, Green, Grey, Natural, Pink, Purple, Red and Yellow


Series Code :SR5756

Parallel Protection Plugs

Parallel protection plugs are general-purpose plugs that are used to protect a variety of applications.

The thermoplastic elastomer range is recommended for applications where resistance to acid is required. The PVC range is highly resistant to shredding and therefore ideal for threaded applications. The green vinyl range works well with applications where oils and greases are present.

Features a parallel or straight wall design that ensures a secure and snug fit while preventing contaminants, damage, dirt, corrosion, moisture, and debris during storage and transportation.

  • Parallel design ensures a secure and snug fit that prevents contaminants, corrosion, and debris during storage and transportation.
  • Easy to install and remove, and provides a neat finish.
  • Suitable for various applications including automotive, manufacturing, and commercial.
Material: LDPE, TPR, TPE, PVC, Vinyl Colour: Natural, Black, Red, Green Series Code: SR1015, SR1067, SRSTG, SRSTLL, SR1014, SR1013, SRF0000

Side Pull Plugs

Side Pull Plugs are a type of plug that features an intergral side pull tab, and is designed for easy removal in awkward locations. Designed to protect threaded or non-threaded holes during production, storage, and transportation. Offers protection against dust, dirt, damage, moisture, acid, and corrosion.

The side pull tab is designed for quick and easy removal, and provides additional help when removing the part from a tightly fitted application. It can withstand temperatures from -40F to 275F (-40C to 135C).

Used in various applications, including machinery, electronics, automotive, and HVAC systems.

  • Protects against dust, dirt, damage, moisture, acid, and corrosion.
  • Withstands temperatures from -40F to 275F (-40C to 135C).
  • Tapered design allows the part to plug multiple inner diameters.
Material: LDPE, TPE Colour: Blue, Yellow, Natural Series Code: SR1110, SRSTCL2, SR1053

USB Dust Cover

USB and RJ Dust Covers are used to protect USB and RJ ports while they are not in use. It prevents dust, dirt, debris, and moisture from entering electrical components.

The covers are simple to attach through push fit, and no tension is applied to the adapter's internal components while entering. It is resistant to temperatures of up to 150C | 302F. Used for applications including the technology industry and cover connectors from printers, scanners and other electronic devices with USB ports.

  • Material: Silicone Rubber, Plastic, EPDM
  • Colour: Black


Series Code :SRF0058