M2.5, Countersink (CSK), Socket Screw (12.9).
M2.5, Countersink (CSK), Socket Screw/ Allen Bolt, High Tensile (10.9), DIN 7991.
Here at Fixaball, we stock all sizes and lengths at the best internet prices and free delivery
Orders placed before 2pm are usually dispatched same day (Mon-Fri).
The, ‘Socket Screw/ Allen Bolt,’ term is used to describe a fastener that is partially threaded in lengths over 1 inch. This space of unthreaded area confirms that the fastener is a bolt. Some engineers may call them screws if the person only uses the shorter length range of sizes, under an inch. ‘Socket,’ refers to the hexagon shaped indentation found on the top of the fasteners’ head. Here, you can use a hexagon key (Allen Key) to tighten and loosen the fastener.
Metric Coarse and Metric Fine
Are in Millimetre (mm) units and were developed to simplify the imperial systems. Europe moved to this system but the Americans choose Imperial as their default. A coarse thread has less helical coils per mm and a fine one has more. Coarse is used for heavier loads and fine is used for lighter loads prone to vibrations.
Our socket screws are available in the following materials:
|
Material/ Finish |
Appearance |
Level of Corrosion Resistance |
Typical Application |
|
High Tensile Steel |
Self-Colour (black with no surface treatment) |
Low, without further surface treatment |
|
|
High Tensile Steel - Zinc |
Bright Shine – Blue to Yellow |
Internal |
|
|
High Tensile Steel -Galvanised |
Textured, several dull, metallic tones |
External |
|
|
A2 Stainless Steel |
Dull Shine |
External |
|
|
A4 Stainless Steel |
Dull Shine |
External |
|
Please choose from the following for technical and/ or sales enquiries.
- Fill out the website enquiry form
- Click on the CHAT icon on the website
- Call: 01242 522244
- Email: sam@fixaball.co.uk
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