ISO 7380Button head (low dome)Hexagon socket
ISO 7380 M5 × 20 Button head (low dome)
ISO 7380 M5 × 20 is a button head socket screw with a 20 mm nominal length, on a M5 × 0.8 mm metric thread. A low dome head with internal hex drive. Chosen when you want a finished look without machining a countersink.
Diameter5 mm
Length20 mm
Pitch0.8 mm
Socket size s3 mm
Head Ø dk9.5 mm
HeadButton head (low dome)
DriveHexagon socket
Dimensions
- Standard
- ISO 7380
- Type
- Button head socket screw
- Size
- M5 × 20
- Thread
- M5 × 0.8
- Length L
- 20 mm
- Socket size s
- 3 mm
- Head diameter dk
- 9.5 mm
- Head height k
- 2.75 mm
- Drive
- Hexagon socket
- Head
- Button head (low dome)
Nominal values in millimetres as published in ISO 7380. Estimated weight 4.613 g per piece in steel (4.642 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