Countersunk screw ISO 10642 / DIN 7991, M 4x6, head 8 mm, hex socket 2.5 mm, steel 10.9, plain

The countersunk screw to ISO 10642 and DIN 7991 draws components together in such a way that the head, 8 mm across, disappears completely into the counterbore. Thread M 4 and shank length 6 mm set the depth of engagement, tightening is done through the hexagon socket with a width across flats of 2.5 mm. The stated material is plain steel (black), property class 10.9.

Benefits

• head diameter 8 mm and head height 2.5 mm to ISO 10642, matching the standard counterbore
• hexagon socket with 2.5 mm width across flats for a high tightening torque in a tight space
• thread M 4 over 6 mm of shank length
• thread up to approximately the head, the full depth of engagement can be used
• property class 10.9 for high preload forces
• a flush finish, at 2.5 mm head height no edge is left standing above the joint

Applications

Its place is in furniture and shopfitting, on fittings and hinges that have to sit flush.

Standards and conformity

The screw is made to ISO 10642 and DIN 7991. The material is stated as property class 10.9.