DIN 937 Thin Castle and Slotted Nuts

DIN 937 Slotted and Castle Nuts

Across Flat Overall
Thickness		 Unslotted
Thickness		 Slot
Width		 Castle
Diameter		 Countersink
Diameter		 Bearing
Diameter		 Across
Corner

s m w n de da dw e

max min max min max min max min max min max min min min
M6 10 9.78 6 5.7 3.5 3.2 2.25 2

6.75 6 8.8 11.05
(M7) 11 10.73 7 6.64 4 3.7 2.25 2

7.75 7 9.5 12.12
M8 13 12.73 8 7.64 4.5 4.2 2.75 2.5

8.75 8 11.3 14.38
M10 17 16.73 9 8.64 5 4.7 3.05 2.8

10.8 10 15.3 18.9
M12 19 18.67 10 9.64 6 5.7 3.8 3.5 17 16.57 13 12 17.2 20.1
(M14) 22 21.67 11 10.57 7 6.64 3.8 3.5 19 18.48 15.1 14 20.2 24.49
M16 24 23.67 12 11.57 7 6.64 4.8 4.5 22 21.48 17.3 16 22.2 26.75
(M18) 27 26.16 13 12.3 8 7.64 4.8 4.5 25 24.3 19.5 18 24.8 29.56
M20 30 29.16 13 12.3 8 7.64 4.8 4.5 28 27.3 21.6 20 27.7 32.95
(M22) 32 31 15 14.3 9 8.64 5.8 5.5 30 29.3 23.8 22 29.5 35.03
M24 36 35 15 14.3 9 8.64 5.8 5.5 34 33 25.9 24 33.3 39.55
(M27) 41 40 17 16.3 11 10.57 5.8 5.5 38 37 29.2 27 38 45.2
M30 46 45 18 17.3 11 10.57 7.36 7 42 41 32.4 30 42.8 50.85
(M33) 50 49 20 19.16 13 12.57 7.36 7 46 45 35.6 33 46.6 55.37
M36 55 53.8 20 19.16 13 12.57 7.36 7 50 49 38.9 36 51.1 60.79
(M39) 60 58.8 22 21.16 13 12.57 7.36 7 55 53.8 42.1 39 55.9 66.44
M42 65 63.1 23 22.16 14 13.57 9.36 9 58 56.8 45.4 42 60 71.3
(M45) 70 68.1 25 24.16 16 15.57 9.36 9 62 60.8 48.6 45 64.7 76.95
M48 75 73.1 25 24.16 16 15.57 9.36 9 65 63.8 51.8 48 69.5 82.6
M52 80 78.1 27 26.16 18 17.57 9.36 9 70 68.8 56.2 52 74.2 88.25

Sizes in Brackets shall be avoided as much as possible.

6 slots in nuts up to and including M39
8 slots in nuts above and including M39

It is at our discretion if the bottom of the slots are rounded or flat.