Hexagon head screw DIN 933 ISO 4017, full thread, M 8x20, AF 13, plain steel 12.9

Hexagon head screws M 8x20 join flanges, profiles and housings wherever the wrench has to reach the head from outside. This variant is made of plain steel of property class 12.9 and has a width across flats of 13 mm to DIN 933.

Benefits

• Thread almost up to the head to DIN 933 and ISO 4017, load bearing thread over the full length of 20 mm
• Hexagon head with 13 mm across the flats for open end, ring and socket wrenches
• Property class 12.9 as the highest class offered in this series
• Plain surface without an added layer, so the dimensions match DIN 933 directly
• Head height of 5.3 mm limits the build height of the joint
• Metric coarse thread M 8, matching nuts and tapped holes are standardised and widely available

Applications

Internal bolted joints in machine building, test rigs and fixtures, mounting of drive components, repair and spare part stock.

Standards and conformity

Dimensions and thread version follow DIN 933 and ISO 4017. The width across flats is 13 mm to DIN and 13 mm to ISO. The material is plain steel (black finish) of property class 12.9.