Socket head cap screw DIN 912 / ISO 4762, hex socket AF 17, M 20x55, steel zinc plated 8.8

This version in steel zinc plated 8.8 covers the M 20 thread at 55 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.
• Size M 20 transmits high clamping forces, and the AF 17 hex socket takes the required tightening torque.
• Property class 8.8 with electroplated zinc coating as surface protection.
• 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 55 mm for engagement.

Applications

• General assembly in equipment building
• Bolting of covers and sheet metal
• Machine frames and stands
• Conveying technology and plant construction

Standards and conformity

Head, AF 17 hex socket and M 20 thread follow DIN 912 in conjunction with ISO 4762. The material is documented as steel zinc plated 8.8.