ISO 10642Countersunk head (90°)Hexagon socket
ISO 10642 M5 × 8 Countersunk head (90°)
ISO 10642 M5 × 8 is a socket countersunk head screw with a 8 mm nominal length, on a M5 × 0.8 mm metric thread. ISO equivalent of DIN 7991. Both use the same 90° countersink angle, so mating holes are interchangeable.
Diameter5 mm
Length8 mm
Pitch0.8 mm
Socket size s3 mm
Head Ø dk10 mm
HeadCountersunk head (90°)
DriveHexagon socket
Dimensions
- Standard
- ISO 10642
- Type
- Socket countersunk head screw
- Size
- M5 × 8
- Thread
- M5 × 0.8
- Length L
- 8 mm
- Socket size s
- 3 mm
- Head diameter dk
- 10 mm
- Head height k
- 3.1 mm
- Thread length b
- 22 mm
- Drive
- Hexagon socket
- Head
- Countersunk head (90°)
Nominal values in millimetres as published in ISO 10642. Estimated weight 2.348 g per piece in steel (2.363 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M5 thread pageDesignationM5 × 0.8
Pitch0.8 mm
Major Ø5 mm
Pitch Ø4.48 mm
Minor Ø ext4.02 mm
Tap drillØ 4.2 mm
Other lengthsISO 10642 M5
All M5 specificationsInterchangeability
ISO 10642 is catalogued with DIN 7991 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.