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  Name: Prevailing Torque Type Hexagon Thin Nuts With Nonmetallic Insert
Serial number: DIN985-1987
Thread size D M20 M22 M24 M27 M30 M33 M36 M39 M42 M45 M48
M20
*2
M22
*2
M24
*2
M27
*2
M30
*2
M33
*2
M36
*2
M39
*2
M42
*2
M45
*2
M48
*2
M20
*1.5
M22
*2
-- -- -- -- -- -- -- -- --
P1 2.5 2.5 3 3 3.5 3.5 4 4 4.5 4.5 5
da min 20 22 24 27 30 33 36 39 42 45 48
max 21.6 23.7 25.9 29.1 32.4 35.6 38.9 42.1 45.4 48.6 51.8
dw min 27.7 29.5 33.2 38 42.7 46.6 51.1 55.9 60.6 64.7 69.4
e   32.95 35.03 39.55 45.2 50.85 55.37 60.79 66.44 72.09 76.95 82.6
h min 20 22 24 27 30 33 36 39 42 45 48
max 18.7 20.7 22.7 25.7 28.7 31.4 34.4 37.4 40.4 43.4 46.4
m2   14 15 15 17 19 22 25 27 29 32 36
m3   11 12.2 13.2 14.8 16.5 18.2 19.8 21.5 23.1 24.8 26.5
s min 30 32 36 41 46 50 55 60 65 70 75
max 29.16 31 35 40 45 49 53.8 58.8 63.8 68.1 73.1
1.DIN 13第12部分规定的粗牙螺距
2.也是最小螺纹长度
3.m'=055d.
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