Countersunk screw ISO 10642 / DIN 7991, M 3x20, head 6 mm, hex socket 2 mm, steel 8.8, plain

Where a bolted joint has to stay flat, the countersunk screw to ISO 10642 and DIN 7991 works with thread M 3 and 20 mm length. The head measures 6 mm across and 1.9 mm in height, the hexagon socket has a width across flats of 2 mm. It is supplied in plain steel (black), property class 8.8.

Benefits

• head diameter 6 mm and head height 1.9 mm to ISO 10642, matching the standard counterbore
• hexagon socket with 2 mm width across flats for a high tightening torque in a tight space
• thread M 3 over 20 mm of shank length
• thread up to approximately the head, the full depth of engagement can be used
• property class 8.8 for general mechanical engineering
• a flush finish, at 1.9 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.