Socket head cap screw DIN 912 / ISO 4762, hex socket AF 17, M 20x40, steel 10.9 plain (black)

This version in steel 10.9 plain (black) covers the M 20 thread at 40 mm length. The cylindrical head with 30.0 mm diameter and 20.0 mm height takes an AF 17 hex socket, so no wrench flats are needed on the head.

Benefits

• The AF 17 hex socket transmits the tightening torque without wrench flats on the head.
• Head diameter 30.0 mm at 20.0 mm head height to DIN 912, matching a cylindrical counterbore.
• The thread running nearly up to the head uses the full length of 40 mm for engagement.
• Property class 10.9 allows higher preload than 8.8 at the same size M 20.

Applications

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

Standards and conformity

The dimensions comply with DIN 912 and ISO 4762. Material and class are specified as steel 10.9 plain (black).