M6 (8mm) x 90mm Socket Cap Shoulder Screws, Self-Colour, Grade 12.9, ISO 7379

Precision Alignment - High Strength

The M6 x 90mm socket shoulder screw is a precision fastener designed for accurate positioning, smooth rotation, and high-load applications.

Consisting of a socket cap head, an enlarged unthreaded shoulder section, and a threaded lower section. The shoulder can function as a dowel, pivot, or axle, allowing movement to occur around it. 

Manufactured from grade 12.9 high tensile steel, this shoulder screw delivers exceptional strength and durability, making it ideal for engineering, mechanical, and industrial use.

Widely used by engineers, machinists and manufacturers where precision and strength are needed. Part of a larger range of shoulder screws from Fusion Fixings.

M6 Socket Shoulder Screw Technical Specifications

• Thread diameter (TD): M6 - 6mm
• Shoulder diameter (SD): 8mm max
• Shoulder length (SL): 90mm
• Thread length (TL): 11.25mm
• Thread pitch: 1mm
• Head diameter (H): 13mm max
• Head height (HH): 5.5mm max
• Drive type (DT): Socket 4mm
• Material: Self-colour, grade 12.9 steel
• Conformity: ISO 7379 standards

M6 Socket Shoulder Screw Key Features & Benefits

• Precision Ground Shoulder
  Provides accurate alignment and acts as a pivot, axle or locating pin in assemblies. 

• High Tensile Steel (Grade 12.9)
  Engineered to withstand high stress and load-bearing applications. 

• ISO 7379 Standard
  Ensures consistent dimensions, tight tolerances and reliable performance across applications. 

• Socket Head (Hex Drive)
  Allows for secure tightening with a hex key or drive. 

Shoulder screws Frequently Asked Questions

What is a shoulder screw used for?

Shoulder screws are used as pivot points, axles or guides in assemblies where precise alignment and movement are required. 

What does 12.9 grade mean?

Grade 12.9 indicates high tensile strength steel, suitable for demanding applications with high loads and stress. 

What’s the difference between a shoulder screw and a standard bolt?

A shoulder screw has a smooth, unthreaded section (shoulder) below the head that is wider than the threaded section for alignment or rotation, while a standard bolt is fully threaded or with a shank of a consistent width.

Can this be used as a pivot or axle?

Yes, this is one of its primary uses as the precision shoulder provides smooth rotation and consistent positioning.

Are these suitable for high-load applications?

Yes, thanks to the 12.9 high tensile steel, they are designed for high-strength, load-bearing uses.

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