Hexagon head screw DIN 933 ISO 4017, full thread, M 4x20, AF 7, zinc plated steel 8.8

This hexagon head screw M 4x20 is 20 mm long and made of zinc plated steel of property class 8.8. The thread to DIN 933 and ISO 4017 also allows use where the clamping length amounts to only a few millimetres. Head height 2.8 mm and width across flats 7 mm define the space the joint requires.

Benefits

• Property class 8.8 as the characteristic value for the load capacity of the joint M 4x20
• Head height of 2.8 mm keeps the build height of the joint M 4x20 low
• Short clamping lengths are possible because at 20 mm length no plain shank has to be allowed for
• Hexagon head with 7 mm across flats to DIN and ISO for open end, ring and socket wrenches
• Zinc plated surface for assemblies exposed to moisture
• Thread M 4 almost up to the head to DIN 933 and ISO 4017, load bearing over the length of 20 mm

Applications

Bolted joints on machines with changing humidity, support frames and brackets, vehicle and trailer bodies, general assembly in maintenance.

Standards and conformity

Dimensions and thread design of size M 4x20 follow DIN 933 and ISO 4017. The width across flats amounts to 7 mm and is stated identically in DIN and ISO. The material is zinc plated steel, property class 8.8.