ISO 4161FlangeExternal hexagon
ISO 4161 M12 Flange
ISO 4161 M12 is a flange nut, on a M12 × 1.5 mm metric thread. A hex nut with a wide circular flange that spreads the clamping load and behaves like an integrated washer. Speeds up assembly versus nut + washer.
Diameter12 mm
Pitch1.5 mm
Socket size s16 mm
Height m12 mm
Flange Ø dc26 mm
HeadFlange
DriveExternal hexagon
Dimensions
- Standard
- ISO 4161
- Type
- Flange nut
- Size
- M12
- Thread
- M12 × 1.5
- Socket size s
- 16 mm
- Height m
- 12 mm
- Flange diameter dc
- 26 mm
- Drive
- External hexagon
- Head
- Flange
Nominal values in millimetres as published in ISO 4161. Estimated weight 5.009 g per piece in steel (5.041 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M12 thread pageDesignationM12 × 1.5 fine
Pitch1.5 mm
Major Ø12 mm
Pitch Ø11.03 mm
Minor Ø ext10.16 mm
Tap drillØ 10.5 mm