M8 x 190mm Socket Cap Head Screw, Self Colour, Grade 12.9 high tensile steel, DIN 912

Socket head cap screw

Socket cap head screw with a deep internal socket recess allowing you to apply the required torque for a secure hold.

A self-colour machine screw also known as Allen key bolts, cap head bolts, or socket screws and manufactured from grade 12.9 high tensile steel for reliability. 

Ideally suited for situations where space is tight and where a high clamping force is needed. Installed with an Allen wrench or hex key which sees them widely used.

Available in a large number of sizes and lengths, these screws are used by both DIY enthusiasts and professionals across many diverse sectors. These include automotive, aerospace, machinery, electronics, and construction.

M8 socket cap head screw specification:

• Diameter (TD): M8 - 8mm
• Length (L): 190mm
• Thread length (TL): 28mm min
• Head width (HW): 13mm max
• Head height (HH): 8mm max
• Head type: Cap Head
• Drive type (DT): Internal hex drive (Size 6mm)
• Pitch: 1.25mm
• Material: Grade 12.9 high tensile steel
• Finish: Self-colour
• Conformity: DIN 912
  

A self-colour screw part of an extensive range of socket head cap screws available from Fusion Fixings with bulk discounts.

FAQs about self-colour cap head socket screws

What does “Grade 12.9” mean with socket cap head screw?

Grade 12.9 refers to a high-tensile steel strength class. It means the screw has an ultimate tensile strength of 1200 MPa (or approximately 175,000 psi) making it one of the strongest metric fasteners available.

Grade 12.9 is typically used in engineering, automotive, machinery and heavy-duty applications where maximum strength is required.

What is a “self-colour” finish?

“Self-colour” means the screw is supplied in its natural steel finish after heat treatment. The screws are sometimes lightly oiled or treated with a black oxide.

Are grade 12.9 socket cap screws corrosion-resistant?

No, these cap head screws are not corrosion resistant and the self-colour or black oxide finish gives limited resistance, making them not suitable for external conditions.

How is the length of the cap head screw measured?

The length of these screws is measured from under the head to the end of the thread, not including the head height.

Can I use grade 12.9 screws in high-temperature or vibrating applications?

Yes, these grade 12.9 screws are suitable for high operating temperatures and perform well in vibration-prone environments such as engines or machinery where they are widely used.

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