Socket head cap screw DIN 912 / ISO 4762, hex socket AF 3, M 4x20, steel 12.9 plain (black)

This version in steel 12.9 plain (black) covers the M 4 thread at 20 mm length. The cylindrical head with 7.0 mm diameter and 4.0 mm height takes an AF 3 hex socket, so no wrench flats are needed on the head.

Benefits

• Size M 4 with only 7.0 mm head diameter saves space on tight hole patterns.
• Property class 12.9 offers the highest strength in this range at the same size M 4.
• The AF 3 hex socket transmits the tightening torque without wrench flats on the head.
• The thread running nearly up to the head uses the full length of 20 mm for engagement.
• Dimensions to DIN 912 and ISO 4762, therefore interchangeable with existing M 4 joints.

Applications

• Drive and gearbox engineering
• Clamping fixtures in tool making
• Hydraulic and pneumatic power units
• Highly loaded flange joints

Standards and conformity

Head, AF 3 hex socket and M 4 thread follow DIN 912 in conjunction with ISO 4762. The material is documented as steel 12.9 plain (black).