M2.5 12.9 Self Colour Socket Cap Screws DIN 912

Product Description

M2.5 × 0.45mm property class 12.9 self-colour steel socket cap set screws, fully threaded and manufactured to the DIN 912 / ISO 4762 cylindrical socket-head pattern.

These compact high-tensile metric screws feature a cylindrical socket cap head and an internal 2mm hexagon drive. The fully threaded design makes them suitable for precision machinery, instrumentation, electronics, model engineering, tooling and other assemblies requiring a strong small-diameter fastener.

• Thread size: M2.5
• Thread pitch: 0.45mm metric coarse
• Threading: Fully threaded
• Available lengths: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm and 20mm
• Head style: Cylindrical socket cap head
• Head diameter: Approximately 4.5mm
• Head height: Approximately 2.5mm
• Drive type: Internal hexagon / Allen key
• Allen key size: 2mm
• Material: High-tensile alloy steel
• Property class: 12.9
• Finish: Self colour / unplated black steel
• DIN standard: DIN 912
• Current international standard: ISO 4762
• British adoption: BS EN ISO 4762
• Legacy British reference: BS 4168-1
• Pack sizes available: 1, 5, 10, 20, 50, 100, 250, 500 and 1000

These M2.5 socket cap screws are suitable for precision machinery, robotics, electronics, instrumentation, model engineering, tooling, small brackets, mechanical assemblies and equipment repairs.

The standard M2.5 × 0.45mm metric coarse thread must be used with a corresponding M2.5 nut, threaded insert or tapped hole. It is not interchangeable with M2, M3 or non-metric thread forms.

The fully threaded construction provides thread engagement along the usable length beneath the head. This is useful in assemblies with thin components or where the screw must engage deeply into a threaded hole without requiring a plain shank.

Property class 12.9 is a high-strength alloy-steel grade intended for demanding mechanical applications. Correct tightening torque depends on the joint design, thread condition, lubrication, mating material and required clamp load. Published torque figures should not be applied without checking the specific assembly requirements.

The cylindrical socket cap head allows higher tool engagement than many low-profile screw-head designs. Installation requires a correctly sized 2mm Allen key or hex socket bit, fully inserted into the recess to reduce the risk of rounding the drive.

The self-colour finish means the screws are supplied without a protective zinc coating. A dark or blackened surface appearance may be present, but this should not be treated as substantial corrosion protection.

These screws should be kept dry and may require oil, grease, paint or another suitable protective treatment when used in damp, exterior or corrosive conditions. Zinc-plated or stainless steel fasteners may be more suitable where corrosion resistance is a primary requirement.

Socket cap screw length is measured from directly beneath the head to the end of the screw. The cylindrical head is not included in the stated length.

Please note: DIN 912 is the traditional designation used on the product page. ISO 4762 is the current international dimensional reference, with BS EN ISO 4762 being the corresponding British adoption. The dimensional table currently shows rows up to 12mm, while the selector also offers 14mm, 16mm, 18mm and 20mm lengths. The same nominal head, drive and thread dimensions have been applied to all listed lengths. Specifications are intended as a guide only; please check where fit or mechanical performance is critical.

Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.