Socket head cap screw DIN 912 / ISO 4762, hex socket AF 2.5, M 3x20, steel plain (black) 8.8

This version in steel plain (black) 8.8 covers the M 3 thread at 20 mm length. The cylindrical head with 5.5 mm diameter and 3.0 mm height takes an AF 2.5 hex socket, so no wrench flats are needed on the head.

Benefits

• Head diameter 5.5 mm at 3.0 mm head height to DIN 912, matching a cylindrical counterbore.
• The AF 2.5 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.
• Property class 8.8 in plain finish for protected or oily installation points.
• Dimensions to DIN 912 and ISO 4762, therefore interchangeable with existing M 3 joints.

Applications

• Tool and mould making
• Machine and fixture building
• Bolting of flanges and covers
• Frame and profile structures

Standards and conformity

Head, AF 2.5 hex socket and M 3 thread follow DIN 912 in conjunction with ISO 4762. The material is documented as steel plain (black) 8.8.