Countersunk screw ISO 10642 / DIN 7991, M 8x20, head 16 mm, hex socket 5 mm, steel 8.8, zinc-plated

This screw to ISO 10642 and DIN 7991 sits recessed in the hole with its countersunk head of 16 mm diameter and 5.0 mm height and leaves no edge in the way. Thread M 8, length 20 mm and socket width 5 mm govern the choice. The material is zinc-plated steel, property class 8.8.

Benefits

• head diameter 16 mm and head height 5.0 mm to ISO 10642, matching the standard counterbore
• hexagon socket with 5 mm width across flats for a high tightening torque in a tight space
• thread M 8 over 20 mm of shank length
• thread up to approximately the head, the full depth of engagement can be used
• zinc-plated surface at property class 8.8
• a flush finish, at 5.0 mm head height no edge is left standing above the joint

Applications

It is fitted in steel and vessel construction, on clamping strips and brackets with a countersunk hole.

Standards and conformity

The screw is made to ISO 10642 and DIN 7991. The material is stated as property class 8.8.