DIN 7984Low socket headHexagon socket
DIN 7984 M3 × 20 Low socket head
DIN 7984 M3 × 20 is a low head socket cap screw with a 20 mm nominal length, on a M3 × 0.5 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.
Diameter3 mm
Length20 mm
Pitch0.5 mm
Socket size s2 mm
Head Ø dk5.5 mm
HeadLow socket head
DriveHexagon socket
Dimensions
- Standard
- DIN 7984
- Type
- Low head socket cap screw
- Size
- M3 × 20
- Thread
- M3 × 0.5
- Length L
- 20 mm
- Socket size s
- 2 mm
- Head diameter dk
- 5.5 mm
- Head height k
- 2 mm
- Drive
- Hexagon socket
- Head
- Low socket head
Nominal values in millimetres as published in DIN 7984. Estimated weight 1.483 g per piece in steel (1.492 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M3 thread pageDesignationM3 × 0.5
Pitch0.5 mm
Major Ø3 mm
Pitch Ø2.68 mm
Minor Ø ext2.39 mm
Tap drillØ 2.5 mm