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Plastic Threaded Lock Washers

 (50 product groups)

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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

Slottex Plugs

Slotted Plugs are designed with a double sealing ring on the underside of the flange that provides a secure and reliable seal. The design includes five complete threads for a secure fit. Offers protection from dirt, dust, debris, liquid residue and corrision. Head designed not to trap liquid when the plug is secured in place.

These Sealing Plugs are easy to install and remove by hand. The hex head design allows the plug to be applied or removed with a screwdriver, 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.

  • Designed with a double sealing ring for a secure and reliable seal.Designed with a double sealing ring for a secure and reliable seal.
  • Protects from contaminants and ingress of moisture.
  • Easy to install and remove by hand.
  • SRF1007, SRF1005, SRF1117
Material: LDPE, PA, PEColour: Yellow, BlueMaterial Flammability Standard: Series Code: SR1005, SR1007, SR1117

Snap Fit Plugs

These Snap Fit Plugs are designed to facilitate the application and removal on a component. They protect the aperture from ingress of contaminants like dirt, dust, and debris.

Easy to install and remove; once pushed into position, a single twist provides a secure and snug fit. A central tab at the top provides a strong grip for tightening and removal. The range is suitable for hydraulic fittings with Metric, BSP, UNF, and JIC threads.

Each plug covers a range of different thread sizes and styles.

  • Easy to install and remove. Once pushed into position, a single twist provides a secure and snug fit.
  • Features a central tab at the top that provides a strong grip for tightening and removal.
  • Suitable for Metric, BSP, and UNF threads.
Material: LDPE Colour: Red, Yellow, Blue Series Code: SR1010, SRTFUP, SR1119, SR1008

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

Square Tube Inserts

Square Inserts and Glides provide a finished look and offer protection to the end of square tubing, poles and posts. Two designs available; ribbed for maximum grip that can be used on multiple tube guages or with a plain shank that fits one tube guage specifically, giving you a step lead for easy installation.

Designed to provide a tight fitting connection on a variety of tubular products. Some of the range help prevent against damage to floors or other surfaces, as well as tube protection from external elements.

They come in a variety of options and styles; standard square ribbed inserts, lightweight square inserts, and metallic square inserts. Typically used in furniture and industrial equipment applications. The versatility of materials, finishes and colours provides a choice to maximize the aesthetical appearance and premium fit for your application.

  • Finishing product used for square tubular products.
  • Ideal for use on furniture and industrial equipment.
  • Helps prevent damage to floors and protect the tube from external elements.
Material: ABS, LDPE, PE, TPR Colour: Silver, Black, White, Mid Grey, Blue, Red, Yellow, Brown, Green, Dark Grey, Grey Series Code: SR5722, SRANQ, SR1540, SR1542

T-Handle Knobs

T-Handle Knobs have metal inserts or studs that thread easily and create an easy to grip knob with an ergonomic design. The T-Handle design provides a strong hand hold for quickly adjusting controls or as a lever.

Series Code :SR6540

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

Tapered Caps & Plugs - Wide Flange

Wide Flange Tapered Caps and Plugs offers additional protection to the surrounding area on the bearing surface. The wider flange keeps the part from being accidently pushed down through the mating part. Designed to be used as a plug or a cap. The tapered profile allows the part to plug muliple inner diameters or cap multiple outside diameters.

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

Featureing a straight forward push-fit design, they are easy to insall and remove.

  • Prevents the plug from being accidentally pushed down through the contact piece.
  • 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, chemical or medical industries.
Material: LDPE Colour: Yellow, Red, Blue Series Code: SRF0030, SR1001, SR1115

Threaded O-ring Plugs - BSP/Gas Threads

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

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 O-ring Plugs - UNF Threads

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

Threaded Plugs with Gasket

Threaded Plugs with Gaskets are intended to establish a tight and secure seal that prevents dust, dirt, or other undesired components from entering. The inclusion of a gasket (washer) seal improves sealing capabilities, adding an extra layer of protection against leaks and impurities.

Threaded Plugs are easy to install and remove from the application using a straight screwdriver, hex key or wrench. They can withstand temperatures from -30C up to +90C.

Frequently used in hydraulic and pneumatic systems, automotive, and general engineering sectors.

  • Provides a tight seal, preventing contaminants from entering.
  • Easy to install and remove using a straight screwdriver, hex key or wrench.
  • Can withstand temperatures from -30C up to +90C.
Material: LDPE, PA6, PA;TPE Colour: Red, Yellow, White Series Code: SRTFUGP, SRTFTG, SRF0012

Threaded Protection Caps - BSP/Gas Threads

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


Series Code :SR1018, SRF0014, SRF0015

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 Caps - UNF/JIC Threads

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


Series Code :SR1018, SRF0015, SRF0014

Threaded Protection Plugs - BSP/Gas Threads

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


Series Code :SR1002, SR5757, SR1054

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 Protection Plugs - NPT Threads

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


Series Code :SRK0083, SR5759

Threaded Protection Plugs - Quick Fit

  • Its ergonomic pull tab makes it simple to install and remove.
  • 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.
  • Used in various applications, including hydraulic, pneumatic and general engineering industries.
Material: PE-LD
Colour: Red
Material Flammability Standard:


Series Code :SR1009

Threaded Protection Plugs - UNF Threads

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


Series Code :SR1002, SR5762, SR1077, SRF0029

Threaded Protection Plugs - Wide Flange

These Wide Flange Threaded Protection Plugs protect threads and fittings from damage during production, storage, and shipment, ensuring they remain in good condition and ready for use. Their nitrile gasket seals the plug to the mating surface for leak-tightness. The protection plug protects from contaminants like dirt, dust, debris, and moisture from the hole.

Its wide flange design keeps any paint flakes from the hole when removed. It is easy to install or remove by hand, screwdriver, or torque wrench. Due to its Nylon material, it is recommended for intermittent temperatures from -40C to +100C. Used in various applications, including hydraulic, pneumatic and general engineering industries.

  • Material: Nylon
  • Colour: Yellow


Series Code :SR5761

Threaded Sealing Caps - BSP/Gas Threads

These Threaded Sealing Caps 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 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. Used in various applications, including hydraulic, pneumatic and general engineering industries.

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

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

Threaded Sealing Caps - UNF Threads

These Threaded Sealing Caps 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 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. Used in various applications, including hydraulic, pneumatic and general engineering industries.

  • Material: HDPE
  • Colour: Yellow

Wing Knobs - Tapered/Threaded Insert

Female Tapered Wing Knobs are designed to give good leverage with each turn making them ideal for applications that require frequent tightening and loosening. These tapered plastic knobs with steel inserts are easily gripped and durable.

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