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Stainless Steel M4

 (50 product groups)


Machine Screws - Pan

Slotted, Torx and Crossed (Phillips) style Pan Head Machine Screws that come in standard metric and imperial sizes.

A Pan Head Screw is a great replacement to metal screws. They are lightweight, and offer resistance to vibration, chemical and electrical resistance, and corrosion.

A wide choice of materials are available in our Screw Pan Hd range, including Nylon 6/6, Polycarbonate (PC), Polyether Ether Ketone (PEEK), Polyphenylene Sulfide (PPS), plus metal options in Mild Steel and Stainless Steel.

  • DIN 85 and DIN 7985
  • Colours: Beige, Brown, Clear and Natural.

Mating Pieces for Clevis Joints

These Clevis Joint Mating Pieces are meant to work with the clevis joint, allowing for smooth and controlled movement. These are intended to fit between our clevis joints to provide a connection where an angular offset is required.

The excellent fit of the mating piece provides for a tight and solid connection with the clevis joint, assuring stability, reliability, and optimal load transmission. The smooth surface finish of the mating piece decreases friction and wear between the mating components, contributing to the overall longevity and efficiency of the joint.

It ensures they remain aligned and engaged under varying loads and conditions by providing a reliable and safe connection. The thread size is designed to match the clevis joint, making installation and removal simple. Used in various applications for steering linkages, suspension systems, and control mechanisms in the automotive industry, manufacturing, and construction.

  • Intended to fit between our clevis joints to provide a connection where an angular offset is required.
  • The thread size is designed to match the clevis joint, making installation and removal simple.
  • The smooth surface finish of the mating piece decreases friction and wear, contributing to the longevity and efficiency of the joint.
Material: Stainless Steel, Steel Series Code: SRR3427, SRR3426, SRR3421, SRR3420

Miniature Linear Rails

These Miniature Linear Rails are used to direct and support moving loads. It delivers smooth and accurate linear motion in small systems. They comprise a foundation rail, a sliding block, and a series of rolling parts. The base rail is attached to the machine frame, and the slide block slides along it. The rolling components, commonly ball bearings, sustain the weight and decrease friction between the sliding block and the base rail.

It can withstand dynamic loads while considering impact, vibration, and fatigue. As this is a precise system they must be mounted on accurately prepared surfaces.

The carriages come mounted on dummy blocks. Offer the carriage up to the rails and move it off the block and onto the rail to install it. They are often smaller and lighter than regular linear rails, making them excellent for applications requiring restricted space and weight, such as scientific applications, medical equipment, or semiconductor manufacturing.

  • It is smaller and lighter than regular linear rails, making them excellent for applications requiring restricted space and weight.
  • It must be mounted on accurately prepared surfaces.
  • It can withstand dynamic loads while considering impact, vibration, and fatigue.
Material: Stainless Steel Series Code: SRL1012, SRL1010

Miniature Rail Carriages

These miniature rail carriages are a compact and versatile solution for achieving precise linear motion in small-scale applications. They're perfect for applications that need accurate placement and fluid movement in constrained places due to their small size, or applications requiring corrosion resistance as they are made from stainless steel.

The rails' 45 contact gothic arch design guarantees similar load capabilities in all directions. These rails move smoothly and feature a low coefficient of friction and break-away forces. It can sustain large weights, is resistant to corrosion, and is resilient to wear and tear.

Carriages come with a plastic dummy rail. It should be mounted by putting the dummy rail up against the end of the real rail and sliding it from one to the other. It is capable of withstanding temperatures between -40C and +80C. Used in different applications, including medical devices, pharmaceuticals, small automation systems, and optical equipment.

  • It moves smoothly and feature a low coefficient of friction and break-away forces.
  • The rails' 45 contact gothic arch design guarantees similar load capabilities in all directions.
  • It is capable of withstanding temperatures between -40C and +80C.
Material: Stainless Steel Series Code: SRL1012C, SRL1010

Pan Head Seal Screws

This range of sealing screws has a pan head with three options: Torx drive, Philips drive and Slotted drive. Torx drive screws provide a positive, fast engagement that transmits torque with less downward pressure. Phillips drive screws can withstand high torque, making them a good choice for applications that require a tight fit and make it easy to remove the screw, even if it has been driven in tightly. Finally, slotted drive screws have a lower torque capacity than other drive types, such as Phillips or Torx.These screws incorporate an O-ring which is compressed and squeezed between the head and the mating component to complete a more secure seal. They are manufactured from stainless steel, which provides good corrosion resistance and is slightly magnetic.

This seal screws with a pan head are a type of fastener designed with an o-ring to provide secure bi-directional protection against contaminates such as gases and fluids in various applications, minimising the risk of damage to sensitive equipment. They prevent the entry of water, dust, or other contaminants, ensuring a secure, reliable connection.

Seal screws are used in threaded and non-threaded holes in applications such as cabinets or used in the automotive and electric industries. Clearance holes are recommended for optimal sealing performance (see measurements below). Clearance hole depth is 2-3 times the thread pitch; threads are metric coarse pitch.

  • It provides a secure and watertight connection to various applications, minimising the risk of loosening due to vibration or movement.
  • Used in threaded and non-threaded holes in applications such as cabinets or used in the automotive and electric industries.
  • Incorporate an O-ring which is compressed and squeezed between the head and the the mating surface to complete a more secure seal.
Material: 303 Stainless Steel Series Code: SRP0172, SRP0171, SRP0170

Seal Washers

Seal washers are used to provide a reliable and effective sealing solution. It features a design that creates a tight seal between two surfaces, preventing the leakage of fluids, gases or contaminants.

This range of Seal washers incorporates a silicone O-ring that helps it fit the surface and fill gaps or imperfections. They are manufactured from stainless steel, which provides good corrosion resistance and is slightly magnetic.

Seal washers are commonly used in industrial equipment and automotive applications. They are reusable and resistant to a temperature of -75C to +205C.

  • It prevents the leakage of fluids, gases or contaminants.
  • Incorporates a silicone O-ring that helps it fit the surface and fill gaps or imperfections.
  • Reusable and resistant to a temperature of -75C to +205C.
Material: 316 Stainless Steel Series Code: SRP0180

Shoulder Screws - Cap Head

This range of Shoulder Screws feature a cap head with a choice of hexagonal , torx or slotted drive.

  • Hexagonal drives are ideal for precision assembly and are ideally used where less surface area is available.
  • Torx drives provide a positive-engaging, fast-locating technique for transmitting drive torque with less necessary downward pressure.
  • Slotted drives accept standard blade screwdrivers and require less downward pressure to drive parts, than those with recessed openings.

They are made from austenitic Stainless Steel or Titanium that provides good resistance to corrosion and machinability. The material is a popular choice for construction and automotive applications.
  • They are made from austenitic Stainless Steel or Titanium that provides good resistance to corrosion and machinability.
  • The material is a popular choice for construction and automotive applications.
Material: 303 Stainless Steel, 316 Stainless Steel, 416 Stainless Steel, Titanium G2, Titanium G5 Colour: , Black Series Code: SRP0145.A2, SRP0132.A2, SRP0145.A4, SRP0130.A4, SRP0131, SRP0145.B2, SRP0132.B2, SRP0130.B2, SRP0145.B4, SRP0130.B4, SRP0132, SRP0130.T2, SRP0130.T5, SRP0130.A2

Shoulder Screws - Headless

Headless Shoulder Screws are designed for applications that require a smooth bearing surface, without an exposed screw head. Unlike a standard shoulder screw, it features a cylindrical body with a shoulder and a threaded end, but lacks a head. This design allows for secure attachment, while maintaining a clean and compact appearance.

Their headless design makes them ideal for use in constrained spaces, where a standard screw head would interfere with surrounding components. The large unthreaded portion of the screw ensures tight tolerances, which is essential for applications that require precision.

Often used in conjunction with bearings and bushings, to provide reliable support and enable smooth motion.

  • Excellent shear resistance.
  • Widely used in electronic, machinery, automotive and construction applications.
Material: 303 Stainless Steel Series Code: SRP0126

Shoulder Screws - Hex Socket Head

These Shoulder Screws, also known as shoulder bolts, are a type of fastener with a cylindrical shoulder that separates the screw's head from its threaded part. The shoulder is machined to a precise tolerance and serves as a bearing surface for the screw head.

Shoulder Screws are useful in situations that call for a mounting pin, dowel, joint, shaft, or sliding action. It is somewhat magnetic, strong, and corrosion resistant, but not in very harsh conditions.

This range of Shoulder Screws features a hexagonal socket head, which allows them to be easily tightened or loosened with an Allen wrench or hex key. They also feature a non-smooth head, which aids in gripping. These screws are suitable for electronics, machinery and automotive applications.

  • Shoulder is machined to a precise tolerance and serves as a bearing surface for the screw head.
  • Easily tightened or loosened with an Allen wrench or hex key.
  • It is somewhat magnetic, strong, and corrosion resistant.
Material: 303 Stainless Steel, Black Steel Series Code: SRP0137, SRP0136

Shoulder Screws - Pan Head

These Pan Head Shoulder Screws, also known as pan head shoulder bolts, are a type of fastener that consists of a cylindrical shaft with a pan head at one end and a shoulder at the other. The shoulder is machined to a precise tolerance and serves as a bearing surface for the screw head.

Shoulder Screws are useful when a mounting pin, dowel, joint, shaft, or sliding motion is required. It is sturdy and corrosion-resistant, but not in really hard conditions.

This range of Shoulder Screws features a pan head that is slightly domed and a flat bearing. It is suited for low-profile applications and has an aesthetically attractive appearance. Easy to install or remove using slotted screwdrivers. These screws suit electronics, medical devices, machinery and automotive applications.

  • It is sturdy and corrosion-resistant, but not in really hard conditions.
  • It has a pan head that is slightly domed and a flat bearing.
  • It is suited for low-profile applications and has an aesthetically attractive appearance.
Material: 303 Stainless Steel Series Code: SRP0144.A2

Shoulder Screws - Slot Head

These Shoulder Screws, often known as shoulder bolts, are a kind of fastener having a cylindrical head and a threaded shank. They feature a shoulder that runs from the head to the shank which is machined to a precise tolerance. Shoulder screws are commonly used to connect two components, with the shoulder acting as a bearing surface.

Shoulder Screws are appropriate for applications requiring a mounting pin, dowel, joint, shaft, or sliding motion.

This range of Shoulder Screws features a slotted head, which allows them to be driven with a slotted screwdriver. They are magnetic and have excellent shear resistance, although they corrode somewhat more easily than conventional shoulder screws. These screws are suitable for electronics, machinery, automotive and construction applications.

  • Shoulder that runs from the head to the shank which is machined to a precise tolerance.
  • It features a slotted head, which allows them to be driven with a slotted screwdriver.
  • Magnetic and excellent shear resistance, although they corrode somewhat more easily than conventional shoulder screws.
Material: Stainless Steel Series Code: SRP0133

Shoulder Screws - Ultra Low Head

This range of Shoulder Screws feature an ultra low head with a hexagonal socket drive. The head height dimensions of these very low profile screws is approximately 1/3 that of normal shoulder screws. Hexagonal drives are ideal for precision assembly and are ideally used where less surface area is available.

They are made from austenitic Stainless Steel that provides good resistance to corrosion and machinability. The material is a popular choice for construction and automotive applications. These screws are suitable for pharmaceutical and other applications.

  • The head height dimensions of these very low profile screws is approximately 1/3 that of normal shoulder screws.
  • Features a hexagonal drives that is ideal for precision assembly and where less surface area is available.
  • Suitable for pharmaceutical and other applications.
Material: Blackened Stainless 316, 316 Stainless Steel, 303 Stainless Steel Series Code: SRP0134.B4, SRP0134.A4, SR36650

Socket Head Cap Screws - Metal Standard Head

Socket Head Cap Screws with Metal Standard Heads are used to secure and tighten a connection between two or more pieces of material. The cylindrical metal standard head design has a flat top and a recessed hex socket.

It has high strength, durability, and corrosion resistance. The recessed hex socket ensures a secure grip and high torque transfer during installation.

Installation and removal are easy using a hex key or Allen wrench. Used in industries such as automotive, electronics, manufacturing, and construction.

Spring Plungers - Assembly Tools

These assembly tools for spring plungers are designed to facilitate the efficient and precise installation or removal of plungers, in various mechanical and industrial applications.

Due to their small size and spring-loaded nature, manually installing or adjusting spring plungers can be challenging. Therefore, using a dedicated assembly tool is essential for ensuring proper alignment, torque control and a secure fit.

Using these tools significantly reduces the risk of over-tightening, misalignment and deformation of the plungers spring mechanism. This helps maintain optimal performance and longevity.

  • These tools are designed to accommodate different sizes with varying thread dimensions.
Material: Stainless Steel Series Code: SR32200

Spring Plungers - Ball - Slotted

These Spring Plunger with a ball and slotted are used for locating, applying pressure, and lifting off. They have three components: a threaded body, a stainless ball, and a spring mechanism. The spring on the plunger provides the necessary force to keep the plunger in either the extended or retracted position.

The slotted design allows for simple adjustment and exact positioning, allowing one to fine-tune the plunger's extension or retraction to fit individual needs. While the stainless ball is selected for its outstanding corrosion resistance, it ensures the plunger's longevity and reliability even in tough settings. Additionally, the stainless steel ball enables smooth functioning, eliminating friction and wear.

It is simple to install and use and is designed to handle high stress and pressure. The threaded body makes it easy to integrate into existing systems or buildings. It can withstand temperatures up to 250C. These spring plungers are widely utilised in various industries, including medical, optics, orthopaedics, machine and fixture design, lighting equipment, and electronic components, due to their endurance and versatility.

  • Slotted design allows for simple adjustment and exact positioning, allowing one to fine-tune the plunger's extension or retraction to fit individual needs.
  • The stainless steel ball enables smooth functioning, eliminating friction and wear.
  • It can withstand temperatures up to 250C.
Material: 303 Stainless Steel, Blackened steel Series Code: SR32100

Spring Plungers - Ball End - Hex

Spring plungers, with a ball and hexagonal socket, are used to locate, apply pressure and lift off. They consist of three components: threaded body, stainless steel ball and spring mechanism. The spring provides quick locating and indexing.

The hexagonal socket design allows for easy installation and adjustment, using standard hexagonal wrenches, ensuring a secure fit and efficient handling tailored to individual needs. The stainless ball is selected for its outstanding corrosion resistance, ensuring the plungers longevity and reliability, even in tough settings. The smooth surface of the stainless steel ball allows for low-friction contact that reduces wear and enhances the lifespan of both the plunger and its mating components.

The threaded body simplifies integration into existing systems or structures. Options for 'normal' spring force and 'increased' can be tailored to the application.

  • Can withstand temperatures of up to 250C.
  • Due to their durability and versatility these spring plungers are widely used in applications that require frequent engagement and disengagement .
  • Common applications include quick-release mechanisms, assembly fixtures, machine and fixture design, electronics, and locking systems.
Material: Blackened steel, 303 Stainless Steel Series Code: SR31500

Spring Plungers - Ceramic Ball - Slotted

These Spring Plunger with Ceramic Ball and slotted are used for locating, applying pressure, and lifting off. They have three components: a threaded body, a ceramic ball, and a spring mechanism. The spring on the plunger provides the necessary force to keep the plunger in either the extended or retracted position.

The slotted design allows for simple adjustment and exact positioning, allowing one to fine-tune the plunger's extension or retraction to fit individual needs. While the ceramic ball has high hardness, wear, and corrosion resistance, it reduces the possibility of galling or damage to the mating surfaces.

It is simple to install and use and is designed to handle high stress and pressure. The threaded body makes it easy to integrate into existing systems or buildings. It can withstand temperatures up to 250C. These spring plungers are widely utilised in various industries, including medical, optics, orthopaedics, machine and fixture design, lighting equipment, and electronic components, due to their endurance and versatility.

  • The slotted design allows for simple adjustment and exact positioning, allowing one to fine-tune the plunger's extension or retraction.
  • The ceramic ball has high hardness, wear, and corrosion resistance, reducing the possibility of galling or damage to mating surfaces.
  • It can withstand temperatures up to 250C.
Material: Stainless Steel Series Code: SR32102

Spring Plungers - Pin - Slotted

These Spring Plungers - Pin - Slotted are used for positioning, indexing, applying pressure, lifting off, and locking. They are made of three parts: a threaded body, a plunger pin, and a spring mechanism. The plunger's spring provides force to hold the plunger in either the extended or retracted position.
Commonly used for precise alignment and secure positioning of components. Extending or retracting the plunger pin can lock or release a component, ensuring accurate alignment and preventing unintended movement. When the plunger pin is extended, it locks into place, preventing the component from being accidentally moved or dislodged.
It is simple to install and use and is designed to handle high stress and pressure. The threaded body makes it easy to integrate into existing systems or buildings. The plunger pin can be easily extended or retracted using manual force by push fitting, allowing for quick adjustments or changes in position. It can withstand temperatures up to 250ºC and is commonly used in industry sectors such as machine and fixture design, electronics, medical and lighting equipment.

  • Extending or retracting the plunger pin can lock or release a component, ensuring accurate alignment and preventing unintended movement.
  • It is simple to install and use and is designed to handle high stress and pressure.
  • It can withstand temperatures up to 250ºC.
Material: Stainless Steel, Black Steel Series Code: SR32150

Stainless Vented Washers

Vented Washers are used with vented screws to aid the quick release of gases from blind tapped holes. The washers are common for HV and UHV systems because their slot vent feature reduces virtual leakage from high vacuum systems.

This range of Stainless Steel vented washers are used with vented screws to improve speed and performance when creating vacuums in vacuum chambers.

These vented washers are commonly used for industrial machinery or automotive components.

  • Commonly used for HV and UHV systems because of the centre vent feature that reduces virtual leakage from high vacuum systems.
  • Used with bolts, screws or other fasteners to improve the performance and durability of the assembly.
  • Used for industrial machinery or automotive components.
Material: 303 Stainless Steel Series Code: SRP0097.A2

Threaded Captive Washers

This range of Captive Washers has a very shallow thread on the inside diameter. This means they can be screwed on, and once past the threads they will not separate from the captive screw or bolt.

How to install a captive screw and washer assembly;
1) Place the captive screw into the panel hole.
2) Thread the washer on to the screw, beyond the threaded part of the screw, which retains the screw in the panel.

The washers are made from Stainless Steel that provides good resistance to corrosion and machinability. The material is a popular choice for construction and automotive applications.

  • Captive Washers has a very shallow thread on the inside diameter.
  • Once past the threads they will not separate from the captive screw or bolt.
  • Screw mounted.
Material: 303 Stainless Steel, 316 Stainless Steel Series Code: SRP0168

Unflanged Aluminium Carriages

These Unflanged Aluminium Carriages are a type of linear bearing that is very effective for heavy loads in various applications where they guide and support linear motion. Their rails are composed of contoured aluminium, with two hardened stainless steel shafts pressed to function as the raceways for the runner block balls.

The unflanged design provides a more compact solution when compared against the flanged carriages but the moving component in the application can only be mounted to the top of the carriage.

Because it is lighter and more corrosion-resistant than steel, it can be used in various applications, including aerospace, machinery, handling technology, machine enclosures, medical, food, etc.

  • Unflanged design provides a more compact solution when compared against the flanged carriages.
  • It is lighter and more corrosion-resistant than steel.
  • It is effective for heavy loads in various applications where they guide and support linear motion.
Material: Aluminium Series Code: SRL1018U

Vented Countersunk Machine Screws

Vented screws are fasteners with a hole drilled through the middle that allow gases trapped at the bottom of a blind threaded hole to escape through the core and provide airflow within an application. The screws are a common option for HV and UHV systems because their centre vent feature reduces virtual leakage from high vacuum systems.

This range of Vented Screws features a countersunk machine head with a hexagonal drive. Hexagonal drives are suitable for precision assembling and when there is limited surface area. They are made from Stainless Steel.

  • Their centre vent feature reduces virtual leakage from high vacuum systems.
  • Ideally suited for usage in sealed enclosures, housings, and machinery.
  • Hexagonal drives are suitable for precision assembling.
Material: 316 Stainless Steel, 304 Stainless Steel Series Code: SRP0093.A4

Vented Screws - Cap Head

This range of Vented Screws features a cap head with a hexagonal drive. Hexagonal drives are ideal for precision assembly and are ideally used where less surface area is available.

The screws hollow core acts like a venting system. The range complies to DIN 912 (with central vent). They are made from ultrasonically cleaned austenitic Stainless Steel that provides very good resistance to corrosion, good strength and machinability.

The material is a popular choice for construction and automotive applications.

  • Hollow core provides an integrated vent system.
  • Made from ultrasonically cleaned austenitic Stainless Steel that provides good resistance to corrosion.
  • Complies to DIN 912.
Material: 316 Stainless Steel, 304 Stainless Steel Series Code: SRP0090.A2

Vented Screws - Hex Head

Vented screws are fasteners with a hole drilled through the middle that allow gases trapped at the bottom of a blind threaded hole to escape through the core and provide airflow within an application. The screws are a common option for HV and UHV systems because their centre vent feature reduces virtual leakage from high vacuum systems.

This range of Vented Screws features a hexagonal head. They are made from Stainless Steel.

  • Allows gases trapped at the bottom of the threaded hole to escape through the core and provide airflow.
  • Their centre vent feature reduces virtual leakage from high vacuum systems.
  • It is suited for sealed enclosures, housings, and machinery.
Material: 316 Stainless Steel, 304 Stainless Steel Series Code: SRP0091.A4

Vented Screws - Socket Button Head

Vented screws are fasteners with a hole drilled through the middle that allow gases trapped at the bottom of a blind threaded hole to escape through the core and provide airflow within an application. The screws are a common option for HV and UHV systems because their centre vent feature reduces virtual leakage from high vacuum systems.

This range of Vented Screws features a socket button head with a hexagonal drive. Hexagonal drives are suitable for precision assembling and when there is limited surface area. They are made from Stainless Steel.

  • Their centre vent feature reduces virtual leakage from high vacuum systems.
  • Hexagonal drives are suitable for precision assembling and when there is limited surface area.
  • Suited for sealed enclosures, housings, and machinery.
Material: 316 Stainless Steel, 304 Stainless Steel Series Code: SRP0094.A2

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