M4, Low Cap Head, Socket Screw (10.9).
M4, Low Cap Head, Bolt/ Socket Screw/ Allen Bolt, High Tensile (10.9)), DIN 7984.
Fixaball.co.uk sells all lengths of M4, high tensile (10.9), low cap head, socket screws at the best internet prices with free delivery.
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Socket Screw is also known as a, 'Socket Set Screw.' The, ‘Socket Screw,’ term is used to describe a fastener that is fully threaded in lengths up to and around 1 inch (from the underside of the head. Over 1 inch in length the fastener will have a, 'shoulder,' or unthreaded area under the head. This space of unthreaded area confirms that the fastener is now a bolt. A little confusing, no? Some engineers may call them screws if the person only uses the shorter length range of sizes, under an inch. Some people might simply call them Allen or, 'Allan,' if they've never seen it written down in association with the Allen, Hexagonal Key. So, ‘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.
Low Cap, refers to a shorter head and is available for those applications that require a shallow profile either in tight installations or visual discretion.
Socket screws are also available in the following head types:
- Cap Head
- Countersink Head
- Button Head
- Flange Button Head
- Socket Set/ Grub
- Shoulder, Cap Head
Metric Coarse Thread (mm)
Metric coarse is the technical term given to the most common thread available, today. The mm/ millimetre 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.
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