DIN 7984Low socket headHexagon socket
DIN 7984 M8 × 20 Low socket head
DIN 7984 M8 × 20 is a low head socket cap screw with a 20 mm nominal length, on a M8 × 1 mm metric thread. Same cylindrical hex socket head as DIN 912 but with roughly half the head height, for assemblies with limited vertical clearance. Lower head means lower permissible preload than a standard DIN 912 of the same size.
Diameter8 mm
Length20 mm
Pitch1 mm
Socket size s5 mm
Head Ø dk13 mm
HeadLow socket head
DriveHexagon socket
Dimensions
- Standard
- DIN 7984
- Type
- Low head socket cap screw
- Size
- M8 × 20
- Thread
- M8 × 1
- Length L
- 20 mm
- Socket size s
- 5 mm
- Head diameter dk
- 13 mm
- Head height k
- 5 mm
- Drive
- Hexagon socket
- Head
- Low socket head
Nominal values in millimetres as published in DIN 7984. Estimated weight 13.101 g per piece in steel (13.185 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M8 thread pageDesignationM8 × 1 fine
Pitch1 mm
Major Ø8 mm
Pitch Ø7.35 mm
Minor Ø ext6.77 mm
Tap drillØ 7 mm