ISO 4161FlangeExternal hexagon
ISO 4161 M16 Flange
ISO 4161 M16 is a flange nut, on a M16 × 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.
Diameter16 mm
Pitch1.5 mm
Socket size s24 mm
Height m16 mm
Flange Ø dc31.9 mm
HeadFlange
DriveExternal hexagon
Dimensions
- Standard
- ISO 4161
- Type
- Flange nut
- Size
- M16
- Thread
- M16 × 1.5
- Socket size s
- 24 mm
- Height m
- 16 mm
- Flange diameter dc
- 31.9 mm
- Drive
- External hexagon
- Head
- Flange
Nominal values in millimetres as published in ISO 4161. Estimated weight 21.735 g per piece in steel (21.874 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M16 thread pageDesignationM16 × 1.5 fine
Pitch1.5 mm
Major Ø16 mm
Pitch Ø15.03 mm
Minor Ø ext14.16 mm
Tap drillØ 14.5 mm