M4 x 20 Socket Cap Screws Black Grade High Tensile Steel 10.9 Pack of 12

They have cylindrical heads and are tightened using a hexagon wrench. Grade 10.9 socket cap screws provide the highest level of strength, Clamping and fatigue resistance when tightened to the recommended torque figure. The fit of the thread form of these products is 5g 6g as standard which is the maximum cross-section possible to allow smooth assembly and assure better mating of assembled parts. Socket Cap Screws have a safe working temperature range of -50 to +300 degrees Celcius, the length of a socket cap screw is measured from under the head separating them from other screw types such as thumb screws.

• Applications industrial applications where maximum strength is required
• Corrosion resistant not suitable for a marine environment
• ideal for strong fixing together many specs of metal plastic or wood,
• Designed for use with wrench or sockets and offers maximum torque
• Surface treatment is black oxide finish self colour