Table 29. American National Standard Prevailing-Torque Metric Hex Nuts— Property Classes 5, 9, and 10 ANSI/ASME B18.16M-2004 (R2016)
S
M
M 1
Countersink
E
D w
Note: Size, Shape and Location of the Prevailing-Torque Element Optional
15–30°
Property Classes 5 and 10 Nuts
Property Class 9 Nuts
Property Class
5 and 10 Nuts
9 Nuts
Width Across Flats, S
Width Across Corners, E
Bearing Face Dia., D w
All Metal a Type
Top Insert Type
All Metal Type
Top Insert Type
Wrenching Height, M 1
Nominal Nut Dia. and Thread Pitch M3 × 0.5 M3.5 × 0.6 M4 × 0.7 M5 × 0.8 M6 × 1 M8 × 1.25 b M10 × 1.5 M10 × 1.5 M12 × 1.75 M14 × 2 M16 × 2 M20 × 2.5 M24 × 3 M30 × 3.5 M36 × 4
Thickness, M
Max.
Min. 5.32 5.82 6.78 7.78 9.78 12.73 14.73 15.73 17.73 20.67 23.67 29.16 35.00 45.00 53.80
Max. 6.35 6.93 8.08 9.24 11.55 15.01 17.32 18.48 20.78 24.25 27.71 34.64 41.57 53.12 63.51
Min. 6.01 6.58 7.66 8.79 11.05 14.38 16.64 17.77 20.03 23.35 26.75 32.95 39.55 50.85 60.79
Max.
Min.
Max. 4.50 5.00 6.00 6.80 8.00 9.50 12.50 11.90 14.90 17.00 19.10 22.80 27.10 32.60 38.90
Min. 3.90 4.30 5.30 6.00 7.20 8.50 11.50 10.90 13.90 15.80 17.90 21.50 25.60 30.60 36.90
Max. 3.10 3.50 4.00 5.30 6.70 8.00 11.20 10.50 13.30 15.40 17.90 21.80 26.40 31.80 38.50
Min.
Max. 4.50 5.00 6.00 7.20 8.50 10.20 13.50 12.80 16.10 18.30 20.70 25.10 29.50 35.60 42.60
Min. 3.90 4.30 5.30 6.40 7.70 9.20 12.50 11.80 15.10 17.10 19.50 23.80 28.00 33.60 40.60
Min.
Min.
Min.
5.50 6.00 7.00 8.00 10.00 13.00 15.00 16.00 18.00 21.00 24.00 30.00 36.00 46.00 55.00
3.10 3.50 4.00 5.30 5.90 7.10 9.70 9.00
2.65 3.00 3.50 4.80 5.40 6.44 8.70 8.04
2.65 3.00 3.50 4.80 5.40 7.14 9.60 8.94
1.4 1.7 1.9 2.7 3.0 3.7 5.6 4.8 6.7 7.8 9.1
1.4 1.7 1.9 2.7 3.0 4.3 6.2 5.6
4.6 5.1 5.9 6.9
8.9 11.6 13.6 14.6 16.6 19.6 22.5 27.7 33.2 42.7 51.1
11.60 13.20 15.20 19.00 23.00 26.90 32.50
10.37 12.10 14.10 16.90 20.20 24.30 29.40
11.57 13.40 15.70 19.00 22.60 27.30 33.10
7.7 8.9 10.5 12.7 15.1 18.2 22.1
10.9 13.0 15.7 19.0
a Also includes metal nuts with non-metallic inserts, plugs, or patches in their threads. b This size with width across flats of 15 mm is not standard. Unless specifically ordered, M10 slotted hex nuts with 16 mm width across flats will be furnished. All dimensions are in millimeters.
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