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Unit:mm

Foundation Plain Washers

JIS B 1220 - 2010

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日标JIS B1220 - 2010 JIS1220 1220JIS Foundation Plain Washers
For Nominal Thread Diameter
M16 M20 M22 M24 M27 M30 M33 M36 M39 M42 M45 M48
d min=nominal size
max
dc max=nominal size
min
h Nominal Size
max
min
18 22 24 26 30 33 36 39 42 45 48 52
18.8 22.8 24.8 26.8 30.8 34 37 40 43 46 49 53.2
32 40 44 48 56 60 63 66 72 78 85 92
31 39 43 47 55 58.8 61.8 64.8 70.8 76.8 83.6 90.6
4.5 (5) 4.5 (5) 6 6 6 8 8 8 8 8 8 8
5 (5.5) 5 (5.5) 6.7 6.7 6.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7
4 (4.5) 4 (4.5) 5.3 5.3 5.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3
For Nominal Thread Diameter
M52 M56 M60 M64 M68 M72 M76 M80 M85 M90 M95 M100
d min=nominal size
max
dc max=nominal size
min
h Nominal Size
max
min
56 60 64 68 72 76 80 84 89 94 99 104
57.2 63 67 71 75 79 83 87 92 97 102 107
98 105 110 115 120 125 135 140 145 160 165 175
96.6 102 107 112 117 122 132 137 142 157 162 172
8 9 9 9 12 12 12 12 12 12 12 16
8.7 10 10 10 13.4 13.4 13.4 13.4 13.4 13.4 13.4 17.4
7.3 8 8 8 10.6 10.6 10.6 10.6 10.6 10.6 10.6 14.6

Alternative history

JIS B 1220 - 2010 JIS B 1220 - 2015
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