Products

The M4 Slotted Round Nut (DIN 546) is a precision-engineered nut designed for secure fastening in applications where space is limited and a clean, flush finish is required. Manufactured from high-quality zinc plated steel, it provides strength, reliability, and corrosion protection for general engineering and mechanical use. Specifications: Standard: DIN 546 Material: Zinc Plated Steel Thread Size: M4 Thread Pitch: 0.7 mm Outside Diameter (D): 8 mm Height (H): 3.5 mm Slot Width (A): 1.4 mm Drive Type: Slotted (for screwdriver or pin spanner) Features: Made to DIN 546 standard for consistent precision and compatibility Zinc plated coating offers excellent corrosion resistance Round low-profile design gives a smooth, snag-free finish Easy installation and removal using a screwdriver or pin spanner Typical Applications: Machinery and equipment assembly Bearing and shaft retention Electrical panels and control systems General mechanical and maintenance tasks

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Material Stainless Steel (A2) Finish Natural Manufacturing Standard ISO 7380 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Hexagon Width Across Flats / Allen Key Size (J) 2.5mm Maximum Head Diameter (D) 7.6mm Maximum Head Length (H) 2.2mm Minimum Hexagon Socket Depth (P) 1.03mm   See a problem with this specification? Let us know.

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Material High Tensile Steel (10.9) Finish Zinc Plated Manufacturing Standard ISO 7380 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Hexagon Width Across Flats / Allen Key Size (J) 2.5mm Maximum Head Diameter (D) 7.6mm Maximum Head Length (H) 2.2mm Minimum Hexagon Socket Depth (P) 1.03mm   See a problem with this specification? Let us know.

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Material Stainless Steel (A2) Finish CB10 Manufacturing Standard DIN 912 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Socket / Allen Key Size (J) 3mm Head Diameter [Max] (D) 7mm Head Diameter (D) Tolerance +0/-0.22mm Head Length [Max] (H) 4mm Head Length (H) Tolerance +0/-0.18mm Hexagon Depth (P) 2mm    See a problem with this specification? Let us know.

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Material High Tensile Steel (12.9) Finish Self Colour Manufacturing Standard DIN 912 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Socket / Allen Key Size (J) 3mm Head Diameter [Max] (D) 7mm Head Diameter (D) Tolerance +0/-0.22mm Head Length [Max] (H) 4mm Head Length (H) Tolerance +0/-0.18mm Hexagon Depth (P) 2mm    See a problem with this specification? Let us know.

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Material Stainless Steel (A2) Finish Natural Manufacturing Standard DIN 912 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Socket / Allen Key Size (J) 3mm Head Diameter [Max] (D) 7mm Head Diameter (D) Tolerance +0/-0.22mm Head Length [Max] (H) 4mm Head Length (H) Tolerance +0/-0.18mm Hexagon Depth (P) 2mm    See a problem with this specification? Let us know.

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Material High Tensile Steel (8.8) Finish Zinc Plated Manufacturing Standard DIN 912 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Socket / Allen Key Size (J) 3mm Head Diameter [Max] (D) 7mm Head Diameter (D) Tolerance +0/-0.22mm Head Length [Max] (H) 4mm Head Length (H) Tolerance +0/-0.18mm Hexagon Depth (P) 2mm    See a problem with this specification? Let us know.

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Material Stainless Steel (A2) Finish CB10 Manufacturing Standard DIN 7991 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Countersunk Angle (CA) 90 Degrees Head Length [Max] (H) 2.48mm Head Diameter [Max] (D) 8.96mm Head Diameter [Min] (D) 7.53mm Hexagon Across Flats / Allen Key Size (J) 2.5mm Hexagon Depth (P) 1.5mm   For larger quantities or sizes not listed, please email frank@franksfasteners.co.uk and we will be happy to provide you with a quotation.

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M4 Socket Countersunk Screws (DIN 7991) in self-colour high tensile steel (10.9) are specific types of screws with particular characteristics: M4: This refers to the metric thread size of the screw. M4 indicates that the diameter of the screw is 4 millimetres. Socket: These screws have a socket (hexagonal) drive, which means you'll need a hex key or Allen wrench to install or remove them. The socket drive design provides a more secure and efficient way to apply torque compared to other drive types like slotted or Phillips. Countersunk: Countersunk screws have a conical head with a flat top. They are designed to sit flush with the surface when installed, giving a neat and smooth finish. DIN 7991: This refers to the standard or specification that the screw follows. DIN 7991 is a standard that specifies the dimensions, tolerances, and other requirements for socket countersunk screws. Self Colour: "Self-colour" means that the screws have not undergone any surface finishing treatment like plating or coating. They are made of plain steel and may be susceptible to corrosion, so they are often used in applications where appearance is not a concern, and other corrosion protection methods are employed. High Tensile Steel (10.9): This indicates the strength and material grade of the screws. "High tensile" means that the steel used is strong and can withstand a significant amount of tensile (pulling) force. The "10.9" is a classification that specifies the hardness and strength of the steel. In this case, 10.9 indicates a tensile strength of 1000 N/mm² and a minimum yield strength of 900 N/mm². Material High Tensile Steel (10.9) Finish Self Colour Manufacturing Standard DIN 7991 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Countersunk Angle (CA) 90 Degrees Head Length [Max] (H) 2.48mm Head Diameter [Max] (D) 8.96mm Head Diameter [Min] (D) 7.53mm Hexagon Across Flats / Allen Key Size (J) 2.5mm Hexagon Depth (P) 1.5mm   For larger quantities or sizes not listed, please email frank@franksfasteners.co.uk and we will be happy to provide you with a quotation.

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Material Stainless Steel (A2) Finish Natural Manufacturing Standard DIN 7991 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Countersunk Angle (CA) 90 Degrees Head Length [Max] (H) 2.48mm Head Diameter [Max] (D) 8.96mm Head Diameter [Min] (D) 7.53mm Hexagon Across Flats / Allen Key Size (J) 2.5mm Hexagon Depth (P) 1.5mm   See a problem with this specification? Let us know.

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Material Steel (10.9) Finish Zinc Plated Manufacturing Standard DIN 7991 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Countersunk Angle (CA) 90 Degrees Head Length [Max] (H) 2.48mm Head Diameter [Max] (D) 8.96mm Head Diameter [Min] (D) 7.53mm Hexagon Across Flats / Allen Key Size (J) 2.5mm Hexagon Depth (P) 1.5mm   See a problem with this specification? Let us know.

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Material Stainless Steel (A2) Finish Natural Manufacturing Standard DIN 127B For Use With Thread Size M4 (4mm) Internal Diameter (ID) 4.1mm External Diameter (OD) 7.6mm Height (S) 0.9mm Uncompressed Height (L) 1.8mm   See a problem with this specification? Let us know.

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Material High Tensile Steel (8.8) Finish Zinc Plated Manufacturing Standard DIN 127B For Use With Thread Size M4 (4mm) Internal Diameter (ID) 4.1mm External Diameter (OD) 7.6mm Height (S) 2.1mm   See a problem with this specification? Let us know.

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Material Spring Steel Finish Zinc Plated Yellow Passivated Manufacturing Standard DIN 127B For Use With Thread Size M4 (4mm) Internal Diameter (ID) 4.1mm External Diameter (OD) 7.6mm Height (S) 2.1mm   See a problem with this specification? Let us know.

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Material Stainless Steel (A2) Manufacturing Standard DIN 127B For Use With Thread Size M4 (4mm) Internal Diameter (ID) 4.1mm External Diameter (OD) 7.6mm Height (S) 0.9mm Uncompressed Height (L) 1.8mm  

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Material Stainless Steel (A2) Finish Natural For Use With Thread Size M4 (4mm) Internal Diameter (ID) 4.5mm External Diameter (OD) 11mm Thickness (T) 2.5mm   The countersunk washer is a versatile and durable fastener suitable for a wide range of applications, including automotive, construction, plumbing, electrical, and industrial settings. These finishing washers are precision-machined from solid stainless steel, offering a far superior finish compared to standard pressed cup washers. They will provide a top-class finish to any project. It can be used to fasten metal, wood, plastic, and other materials, making it ideal for projects where a flush finish is desired.  

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A wing nut is a type of nut with two large wings or projections on the opposite sides, making it easy to tighten or loosen the nut by hand without the need for tools. The wings provide a convenient grip for manual turning. For larger quantities or sizes not listed, please email frank@franksfasteners.co.uk and we will be happy to provide you with a quotation.

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A M4 Threaded Bar in 1000mm threaded bar stud that is A2 Stainless Steel is a type of fastener used in construction and various other applications.  Stainless steel is a corrosion-resistant steel alloy, and A2 is a specific grade within the stainless steel classification. In the A2 grade, the steel is often referred to as 304 stainless steel, which contains a chromium-nickel mixture and is known for its corrosion resistance.

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A M4 Threaded Bar in 1000mm threaded bar stud that is zinc plated steel 8.8 is a type of fastener used in construction and various other applications.  Zinc Plated Steel refers to a protective coating applied to the steel surface. Zinc plating helps prevent corrosion and rust, extending the lifespan of the stud and making it suitable for use in various environments, including those with exposure to moisture or the elements.

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Button A2 Stainless Steel 6-Lobe Pin Machine Screw 6-Lobe recess manufactured with internal pin. Popular security drive for high torque applications. Quickly and easily installed and removed using matching tooling. Driver Size: T20

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Popular aesthetically pleasing drive for any two-way application. This drive system, sometimes known as Snake Eye® or Pig Nose is designed for low to medium torque applications. It has 2 holes drilled into the head which requires a unique 2-pin matching driver to install and remove it.  Driver Size: TH5

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Countersunk A2 Stainless Steel 6-Lobe Pin Machine Screw 6-Lobe recess manufactured with internal pin. Popular security drive for high torque applications. Quickly and easily installed and removed using matching tooling. Driver Size: T20

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Material A2 Stainless Steel Finish CB10 Manufacturing Standard ISO 7380-2 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread  

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Ensure strength, precision, and corrosion resistance with our M4 x 10mm Flanged Socket Button Head Screws, manufactured to the ISO 7380-2 standard. Crafted from A2 (304) stainless steel, these screws are ideal for demanding environments where appearance and durability matter. The ISO 7380-2 standard defines button head screws with an integrated flange and hexagon socket drive, providing greater load-bearing surface, improved clamping force, and vibration resistance—making them a preferred choice for automotive, machinery, and structural applications. M4 Flanged Socket Button Head Screw Specification: Diameter: 4mmLength: 10mmHead Diameter: 9.4mmHead Height: 2.2mmSocket Size: 2.5mmMaterial: Corrosion Resistant A2 Stainless Steel

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Our M4 x 10mm Fully Threaded Metric Hexagon Head Bolt, crafted from high-quality A2 Stainless Steel, is designed to provide exceptional strength and corrosion resistance for a wide range of applications. Key Features: Dimensions: M4 thread diameter with a 10mm length, fully threaded for versatile use. Material: Manufactured from A2 Stainless Steel, offering excellent resistance to corrosion and oxidation. Standard Compliance: Meets DIN 933 specifications, ensuring reliable performance and compatibility. Head Specifications: Features a hexagon head with a 7mm spanner size and a head length of 3mm, allowing for efficient tightening and high torque application. Thread Pitch: Standard 0.7mm pitch, suitable for various fastening needs. Applications: Ideal for use in environments where resistance to corrosion is essential, such as marine, chemical, and outdoor settings. Perfect for fastening components in machinery, automotive assemblies, and structural applications.

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Popular aesthetically pleasing drive for any two-way application. This drive system, sometimes known as Snake Eye® or Pig Nose is designed for low to medium torque applications. It has 2 holes drilled into the head which requires a unique 2-pin matching driver to install and remove it.  Driver Size: TH5

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Slotted countersunk screws are a type of fastener with a slotted drive and a countersunk (also known as a flat or flush) head. The slotted drive has a single straight slot across the head of the screw, which is designed to be turned using a flathead screwdriver. The countersunk head has an angled shape that allows the screw to sit flush with the surface it is fastened to, making it ideal for applications where a smooth, flush finish is desired.   Material Stainless Steel (A2) Finish Natural Manufacturing Standard DIN 963 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Countersunk Angle (CA) 90 Degrees (+2/-0) Head Length (H) 2.2mm Maximum Head Diameter (D) 7.5mm Slot Depth (F) 1.1mm Slot Width (A) 1mm   For larger quantities or sizes not listed, please email frank@franksfasteners.co.uk and we will be happy to provide you with a quotation.

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Material High Tensile Steel (10.9) Finish Self Colour Manufacturing Standard ISO 7380 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Length (L) 10mm Allen Key Size (S) 2.5mm Maximum Head Diameter (DK) 7.6mm Maximum Head Depth (K) 2.2mm   High-strength fasteners are designed for use in applications requiring reliable performance under heavy loads. These screws feature a rounded button head with a hexagonal socket drive, allowing for easy installation and removal with an Allen key.  Made from self-colour high tensile steel with a 10.9 grade, they offer superior strength and durability. Ideal for engineering, machinery, and automotive applications where strong and secure fastening is required. The self-colour finish provides a raw steel look, without additional coatings.

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Material Stainless Steel (A2) Finish CB10 Manufacturing Standard ISO 7380 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread Hexagon Width Across Flats / Allen Key Size (J) 2.5mm Maximum Head Diameter (D) 7.6mm Maximum Head Length (H) 2.2mm Minimum Hexagon Socket Depth (P) 1.03mm  

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Button A2 Stainless Steel 6-Lobe Pin Machine Screw 6-Lobe recess manufactured with internal pin. Popular security drive for high torque applications. Quickly and easily installed and removed using matching tooling. Driver Size: T20

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Popular aesthetically pleasing drive for any two-way application. This drive system, sometimes known as Snake Eye® or Pig Nose is designed for low to medium torque applications. It has 2 holes drilled into the head which requires a unique 2-pin matching driver to install and remove it.  Driver Size: TH5

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Countersunk A2 Stainless Steel 6-Lobe Pin Machine Screw 6-Lobe recess manufactured with internal pin. Popular security drive for high torque applications. Quickly and easily installed and removed using matching tooling. Driver Size: T20

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High torque security screws with incorporated flange head design for enhanced load distribution System Zero® is a Level 3 'Medium Security' fastener, with the ability to be installed and removed using the matching driver tool. The unique head design, in combination with the driver, gives a high torque transmission which in turn generates high clamp loads. The innovative external non-slip drive head features indentations that have been crafted to ensure optimal grip when used with the matching security tooling, facilitating seamless high torque fastening and removal. The incorporated flange design efficiently spreads the load when attaching plastic components, enhancing stability and durability. Driver Size: SZ4

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High torque security screws with incorporated flange head design for enhanced load distribution System Zero® is a Level 3 'Medium Security' fastener, with the ability to be installed and removed using the matching driver tool. The unique head design, in combination with the driver, gives a high torque transmission which in turn generates high clamp loads. The innovative external non-slip drive head features indentations that have been crafted to ensure optimal grip when used with the matching security tooling, facilitating seamless high torque fastening and removal. The incorporated flange design efficiently spreads the load when attaching plastic components, enhancing stability and durability. Driver Size: SZ4

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Our M4 x 12mm Fully Threaded Metric Hexagon Head Bolt, crafted from high-quality A2 Stainless Steel, is designed to provide exceptional strength and corrosion resistance for a wide range of applications. Key Features: Dimensions: M4 thread diameter with a 12mm length, fully threaded for versatile use. Material: Manufactured from A2 Stainless Steel, offering excellent resistance to corrosion and oxidation. Standard Compliance: Meets DIN 933 specifications, ensuring reliable performance and compatibility. Head Specifications: Features a hexagon head with a 7mm spanner size and a head length of 3mm, allowing for efficient tightening and high torque application. Thread Pitch: Standard 0.7mm pitch, suitable for various fastening needs. Applications: Ideal for use in environments where resistance to corrosion is essential, such as marine, chemical, and outdoor settings. Perfect for fastening components in machinery, automotive assemblies, and structural applications.

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Popular aesthetically pleasing drive for any two-way application. This drive system, sometimes known as Snake Eye® or Pig Nose is designed for low to medium torque applications. It has 2 holes drilled into the head which requires a unique 2-pin matching driver to install and remove it.  Driver Size: TH5

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Ensure strength, precision, and corrosion resistance with our M4 x 14mm Flanged Socket Button Head Screws, manufactured to the ISO 7380-2 standard. Crafted from A2 (304) stainless steel, these screws are ideal for demanding environments where appearance and durability matter. The ISO 7380-2 standard defines button head screws with an integrated flange and hexagon socket drive, providing greater load-bearing surface, improved clamping force, and vibration resistance—making them a preferred choice for automotive, machinery, and structural applications. M4 Flanged Socket Button Head Screw Specification: Diameter: 4mmLength: 14mmHead Diameter: 9.4mmHead Height: 2.2mmSocket Size: 2.5mmMaterial: Corrosion Resistant A2 Stainless Steel

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Material High Tensile Steel (10.9) Finish Self Colour Manufacturing Standard ISO 7380 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Length (L) 14mm Allen Key Size (S) 2.5mm Maximum Head Diameter (DK) 7.6mm Maximum Head Depth (K) 2.2mm   High-strength fasteners are designed for use in applications requiring reliable performance under heavy loads. These screws feature a rounded button head with a hexagonal socket drive, allowing for easy installation and removal with an Allen key.  Made from self-colour high tensile steel with a 10.9 grade, they offer superior strength and durability. Ideal for engineering, machinery, and automotive applications where strong and secure fastening is required. The self-colour finish provides a raw steel look, without additional coatings.

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M4 x 15mm x 1mm Penny Washers, also known as Repair Washers, feature a large outside diameter that helps protect the fastened surface by distributing the load over a broader area, reducing the risk of damage. Crafted from A2 Stainless Steel, these washers offer excellent corrosion and oxidation resistance, making them highly durable in harsh chemical and outdoor environments.

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M4 x 15mm Penny Washers, also known as Repair Washers, feature a large outside diameter that helps protect the fastened surface by distributing the load over a broader area, reducing the risk of damage. Crafted from A4 Marine Grade Stainless Steel, these washers offer excellent corrosion and oxidation resistance, making them highly durable in harsh chemical and outdoor environments.

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Button A2 Stainless Steel 6-Lobe Pin Machine Screw 6-Lobe recess manufactured with internal pin. Popular security drive for high torque applications. Quickly and easily installed and removed using matching tooling. Driver Size: T20

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Popular aesthetically pleasing drive for any two-way application. This drive system, sometimes known as Snake Eye® or Pig Nose is designed for low to medium torque applications. It has 2 holes drilled into the head which requires a unique 2-pin matching driver to install and remove it.  Driver Size: TH5

Read more less

Countersunk A2 Stainless Steel 6-Lobe Pin Machine Screw 6-Lobe recess manufactured with internal pin. Popular security drive for high torque applications. Quickly and easily installed and removed using matching tooling. Driver Size: T20

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Material A2 Stainless Steel Finish CB10 Manufacturing Standard ISO 7380-2 Screw Thread Pitch 0.7mm Thread M4 (4mm), Right Hand Thread  

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