
図内の記号
記号 | 単位 | 説明 |
---|---|---|
d | mm | ボルトのねじの呼び径 |
p | mm | ボルトのねじのピッチ |
L | mm | ボルトの長さ |
Xmin | mm | めねじ挿入長さ0.8d超2d以下の被締結体の最小厚さ |
Xmax | mm | めねじ挿入長さ0.8dのときの被締結体の厚さ |
表の説明
項目 | 説明 |
---|---|
列L | ボルトの長さL |
列(L) | *付きのLは非推奨長さ |
列M# | ボルトのねじの呼びM#、長さLのときの Xmin | Xmax |
M3からM16まで
L | (L) | M3x0.5 | M3.5×0.6 | M4x0.7 | M4.5×0.75 | M5x0.8 | M6x1 | M8x1.25 | M10x1.5 | M12x1.75 | M14x2 | M16x2 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
5 | 0 | 2.1 | 0 | 1.7 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | |
6 | 0 | 3.1 | 0 | 2.7 | 0 | 2.0 | 0 | 1.6 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | |
7 | * | 0.5 | 4.1 | 0 | 3.7 | 0 | 3.0 | 0 | 2.6 | 0 | 2.2 | 0 | 1.2 | x | x | x | x | x | x | x | x | x | x |
8 | 1.5 | 5.1 | 0.5 | 4.7 | 0 | 4.0 | 0 | 3.6 | 0 | 3.2 | 0 | 2.2 | x | x | x | x | x | x | x | x | x | x | |
9 | * | 2.5 | 6.1 | 1.5 | 5.7 | 0.2 | 5.0 | 0 | 4.6 | 0 | 4.2 | 0 | 3.2 | x | x | x | x | x | x | x | x | x | x |
10 | 3.5 | 7.1 | 2.5 | 6.7 | 1.2 | 6.0 | 0.2 | 5.6 | 0 | 5.2 | 0 | 4.2 | x | x | x | x | x | x | x | x | x | x | |
11 | * | 4.5 | 8.1 | 3.5 | 7.7 | 2.2 | 7.0 | 1.2 | 6.6 | 0.2 | 6.2 | 0 | 5.2 | 0 | 3.0 | x | x | x | x | x | x | x | x |
12 | 5.5 | 9.1 | 4.5 | 8.7 | 3.2 | 8.0 | 2.2 | 7.6 | 1.2 | 7.2 | 0 | 6.2 | 0 | 4.0 | x | x | x | x | x | x | x | x | |
14 | 7.5 | 11.1 | 6.5 | 10.7 | 5.2 | 10.0 | 4.2 | 9.6 | 3.2 | 9.2 | 1.0 | 8.2 | 0 | 6.0 | 0 | 4.4 | x | x | x | x | x | x | |
16 | 9.5 | 13.1 | 8.5 | 12.7 | 7.2 | 12.0 | 6.2 | 11.6 | 5.2 | 11.2 | 3.0 | 10.2 | 0 | 8.0 | 0 | 6.4 | x | x | x | x | x | x | |
18 | * | 11.5 | 15.1 | 10.5 | 14.7 | 9.2 | 14.0 | 8.2 | 13.6 | 7.2 | 13.2 | 5.0 | 12.2 | 0.4 | 10.0 | 0 | 8.4 | 0 | 6.1 | x | x | x | x |
20 | 13.5 | 17.1 | 12.5 | 16.7 | 11.2 | 16.0 | 10.2 | 15.6 | 9.2 | 15.2 | 7.0 | 14.2 | 2.4 | 12.0 | 0 | 10.4 | 0 | 8.1 | 0 | 6.2 | x | x | |
22 | * | 15.5 | 19.1 | 14.5 | 18.7 | 13.2 | 18.0 | 12.2 | 17.6 | 11.2 | 17.2 | 9.0 | 16.2 | 4.4 | 14.0 | 0.4 | 12.4 | 0 | 10.1 | 0 | 8.2 | 0 | 6.6 |
25 | 18.5 | 22.1 | 17.5 | 21.7 | 16.2 | 21.0 | 15.2 | 20.6 | 14.2 | 20.2 | 12.0 | 19.2 | 7.4 | 17.0 | 3.4 | 15.4 | 0 | 13.1 | 0 | 11.2 | 0 | 9.6 | |
28 | * | 21.5 | 25.1 | 20.5 | 24.7 | 19.2 | 24.0 | 18.2 | 23.6 | 17.2 | 23.2 | 15.0 | 22.2 | 10.4 | 20.0 | 6.4 | 18.4 | 1.7 | 16.1 | 0 | 14.2 | 0 | 12.6 |
30 | 23.5 | 27.1 | 22.5 | 26.7 | 21.2 | 26.0 | 20.2 | 25.6 | 19.2 | 25.2 | 17.0 | 24.2 | 12.4 | 22.0 | 8.4 | 20.4 | 3.7 | 18.1 | 0 | 16.2 | 0 | 14.6 | |
32 | * | 25.5 | 29.1 | 24.5 | 28.7 | 23.2 | 28.0 | 22.2 | 27.6 | 21.2 | 27.2 | 19.0 | 26.2 | 14.4 | 24.0 | 10.4 | 22.4 | 5.7 | 20.1 | 1.4 | 18.2 | 0 | 16.6 |
35 | x | x | x | x | 26.2 | 31.0 | 25.2 | 30.6 | 24.2 | 30.2 | 22.0 | 29.2 | 17.4 | 27.0 | 13.4 | 25.4 | 8.7 | 23.1 | 4.4 | 21.2 | 0.4 | 19.6 | |
38 | * | x | x | x | x | 29.2 | 34.0 | 28.2 | 33.6 | 27.2 | 33.2 | 25.0 | 32.2 | 20.4 | 30.0 | 16.4 | 28.4 | 11.7 | 26.1 | 7.4 | 24.2 | 3.4 | 22.6 |
40 | x | x | x | x | 31.2 | 36.0 | 30.2 | 35.6 | 29.2 | 35.2 | 27.0 | 34.2 | 22.4 | 32.0 | 18.4 | 30.4 | 13.7 | 28.1 | 9.4 | 26.2 | 5.4 | 24.6 | |
45 | x | x | x | x | x | x | x | x | 34.2 | 40.2 | 32.0 | 39.2 | 27.4 | 37.0 | 23.4 | 35.4 | 18.7 | 33.1 | 14.4 | 31.2 | 10.4 | 29.6 | |
50 | x | x | x | x | x | x | x | x | 39.2 | 45.2 | 37.0 | 44.2 | 32.4 | 42.0 | 28.4 | 40.4 | 23.7 | 38.1 | 19.4 | 36.2 | 15.4 | 34.6 | |
55 | x | x | x | x | x | x | x | x | x | x | 42.0 | 49.2 | 37.4 | 47.0 | 33.4 | 45.4 | 28.7 | 43.1 | 24.4 | 41.2 | 20.4 | 39.6 | |
60 | x | x | x | x | x | x | x | x | x | x | 47.0 | 54.2 | 42.4 | 52.0 | 38.4 | 50.4 | 33.7 | 48.1 | 29.4 | 46.2 | 25.4 | 44.6 | |
65 | x | x | x | x | x | x | x | x | x | x | 52.0 | 59.2 | 47.4 | 57.0 | 43.4 | 55.4 | 38.7 | 53.1 | 34.4 | 51.2 | 30.4 | 49.6 | |
70 | x | x | x | x | x | x | x | x | x | x | 57.0 | 64.2 | 52.4 | 62.0 | 48.4 | 60.4 | 43.7 | 58.1 | 39.4 | 56.2 | 35.4 | 54.6 | |
75 | x | x | x | x | x | x | x | x | x | x | x | x | 57.4 | 67.0 | 53.4 | 65.4 | 48.7 | 63.1 | 44.4 | 61.2 | 40.4 | 59.6 | |
80 | x | x | x | x | x | x | x | x | x | x | x | x | 62.4 | 72.0 | 58.4 | 70.4 | 53.7 | 68.1 | 49.4 | 66.2 | 45.4 | 64.6 | |
85 | x | x | x | x | x | x | x | x | x | x | x | x | 67.4 | 77.0 | 63.4 | 75.4 | 58.7 | 73.1 | 54.4 | 71.2 | 50.4 | 69.6 | |
90 | x | x | x | x | x | x | x | x | x | x | x | x | 72.4 | 82.0 | 68.4 | 80.4 | 63.7 | 78.1 | 59.4 | 76.2 | 55.4 | 74.6 | |
95 | * | x | x | x | x | x | x | x | x | x | x | x | x | 77.4 | 87.0 | 73.4 | 85.4 | 68.7 | 83.1 | 64.4 | 81.2 | 60.4 | 79.6 |
100 | x | x | x | x | x | x | x | x | x | x | x | x | 82.4 | 92.0 | 78.4 | 90.4 | 73.7 | 88.1 | 69.4 | 86.2 | 65.4 | 84.6 | |
105 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 78.7 | 93.1 | 74.4 | 91.2 | 70.4 | 89.6 | |
110 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 83.7 | 98.1 | 79.4 | 96.2 | 75.4 | 94.6 | |
115 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 88.7 | 103.1 | 84.4 | 101.2 | 80.4 | 99.6 | |
120 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 93.7 | 108.1 | 89.4 | 106.2 | 85.4 | 104.6 | |
125 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 98.7 | 113.1 | 94.4 | 111.2 | 90.4 | 109.6 | |
130 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 103.7 | 118.1 | 99.4 | 116.2 | 95.4 | 114.6 | |
140 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 113.7 | 128.1 | 109.4 | 126.2 | 105.4 | 124.6 | |
L | M3 | M3.5 | M4 | M4.5 | M5 | M6 | M8 | M10 | M12 | M14 | M16 |
M18からM39まで
L | (L) | M18x2.5 | M20x2.5 | M22x2.5 | M24x3 | M27x3 | M30x3.5 | M33x3.5 | M36x4 | M39x4 |
---|---|---|---|---|---|---|---|---|---|---|
25 | 0 | 8.0 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | |
28 | * | 0 | 11.0 | 0 | 8.8 | 0 | 7.2 | x | x | x | x | x | x | x | x | x | x | x | x |
30 | 0 | 13.0 | 0 | 10.8 | 0 | 9.2 | 0 | 6.8 | x | x | x | x | x | x | x | x | x | x | |
32 | * | 0 | 15.0 | 0 | 12.8 | 0 | 11.2 | 0 | 8.8 | x | x | x | x | x | x | x | x | x | x |
35 | 0 | 18.0 | 0 | 15.8 | 0 | 14.2 | 0 | 11.8 | 0 | 9.4 | x | x | x | x | x | x | x | x | |
38 | * | 0 | 21.0 | 0 | 18.8 | 0 | 17.2 | 0 | 14.8 | 0 | 12.4 | x | x | x | x | x | x | x | x |
40 | 1.4 | 23.0 | 0 | 20.8 | 0 | 19.2 | 0 | 16.8 | 0 | 14.4 | 0 | 11.5 | x | x | x | x | x | x | |
45 | 6.4 | 28.0 | 1.8 | 25.8 | 0 | 24.2 | 0 | 21.8 | 0 | 19.4 | 0 | 16.5 | 0 | 14.1 | x | x | x | x | |
50 | 11.4 | 33.0 | 6.8 | 30.8 | 2.8 | 29.2 | 0 | 26.8 | 0 | 24.4 | 0 | 21.5 | 0 | 19.1 | 0 | 16.2 | 0 | 13.8 | |
55 | 16.4 | 38.0 | 11.8 | 35.8 | 7.8 | 34.2 | 3.0 | 31.8 | 0 | 29.4 | 0 | 26.5 | 0 | 24.1 | 0 | 21.2 | 0 | 18.8 | |
60 | 21.4 | 43.0 | 16.8 | 40.8 | 12.8 | 39.2 | 8.0 | 36.8 | 2.0 | 34.4 | 0 | 31.5 | 0 | 29.1 | 0 | 26.2 | 0 | 23.8 | |
65 | 26.4 | 48.0 | 21.8 | 45.8 | 17.8 | 44.2 | 13.0 | 41.8 | 7.0 | 39.4 | 0.5 | 36.5 | 0 | 34.1 | 0 | 31.2 | 0 | 28.8 | |
70 | 31.4 | 53.0 | 26.8 | 50.8 | 22.8 | 49.2 | 18.0 | 46.8 | 12.0 | 44.4 | 5.5 | 41.5 | 0 | 39.1 | 0 | 36.2 | 0 | 33.8 | |
75 | 36.4 | 58.0 | 31.8 | 55.8 | 27.8 | 54.2 | 23.0 | 51.8 | 17.0 | 49.4 | 10.5 | 46.5 | 4.5 | 44.1 | 0 | 41.2 | 0 | 38.8 | |
80 | 41.4 | 63.0 | 36.8 | 60.8 | 32.8 | 59.2 | 28.0 | 56.8 | 22.0 | 54.4 | 15.5 | 51.5 | 9.5 | 49.1 | 3.0 | 46.2 | 0 | 43.8 | |
85 | 46.4 | 68.0 | 41.8 | 65.8 | 37.8 | 64.2 | 33.0 | 61.8 | 27.0 | 59.4 | 20.5 | 56.5 | 14.5 | 54.1 | 8.0 | 51.2 | 2.0 | 48.8 | |
90 | 51.4 | 73.0 | 46.8 | 70.8 | 42.8 | 69.2 | 38.0 | 66.8 | 32.0 | 64.4 | 25.5 | 61.5 | 19.5 | 59.1 | 13.0 | 56.2 | 7.0 | 53.8 | |
95 | * | 56.4 | 78.0 | 51.8 | 75.8 | 47.8 | 74.2 | 43.0 | 71.8 | 37.0 | 69.4 | 30.5 | 66.5 | 24.5 | 64.1 | 18.0 | 61.2 | 12.0 | 58.8 |
100 | 61.4 | 83.0 | 56.8 | 80.8 | 52.8 | 79.2 | 48.0 | 76.8 | 42.0 | 74.4 | 35.5 | 71.5 | 29.5 | 69.1 | 23.0 | 66.2 | 17.0 | 63.8 | |
105 | * | 66.4 | 88.0 | 61.8 | 85.8 | 57.8 | 84.2 | 53.0 | 81.8 | 47.0 | 79.4 | 40.5 | 76.5 | 34.5 | 74.1 | 28.0 | 71.2 | 22.0 | 68.8 |
110 | 71.4 | 93.0 | 66.8 | 90.8 | 62.8 | 89.2 | 58.0 | 86.8 | 52.0 | 84.4 | 45.5 | 81.5 | 39.5 | 79.1 | 33.0 | 76.2 | 27.0 | 73.8 | |
115 | * | 76.4 | 98.0 | 71.8 | 95.8 | 67.8 | 94.2 | 63.0 | 91.8 | 57.0 | 89.4 | 50.5 | 86.5 | 44.5 | 84.1 | 38.0 | 81.2 | 32.0 | 78.8 |
120 | 81.4 | 103.0 | 76.8 | 100.8 | 72.8 | 99.2 | 68.0 | 96.8 | 62.0 | 94.4 | 55.5 | 91.5 | 49.5 | 89.1 | 43.0 | 86.2 | 37.0 | 83.8 | |
125 | * | 86.4 | 108.0 | 81.8 | 105.8 | 77.8 | 104.2 | 73.0 | 101.8 | 67.0 | 99.4 | 60.5 | 96.5 | 54.5 | 94.1 | 48.0 | 91.2 | 42.0 | 88.8 |
130 | 91.4 | 113.0 | 86.8 | 110.8 | 82.8 | 109.2 | 78.0 | 106.8 | 72.0 | 104.4 | 65.5 | 101.5 | 59.5 | 99.1 | 53.0 | 96.2 | 47.0 | 93.8 | |
140 | 101.4 | 123.0 | 96.8 | 120.8 | 92.8 | 119.2 | 88.0 | 116.8 | 82.0 | 114.4 | 75.5 | 111.5 | 69.5 | 109.1 | 63.0 | 106.2 | 57.0 | 103.8 | |
150 | 111.4 | 133.0 | 106.8 | 130.8 | 102.8 | 129.2 | 98.0 | 126.8 | 92.0 | 124.4 | 85.5 | 121.5 | 79.5 | 119.1 | 73.0 | 116.2 | 67.0 | 113.8 | |
160 | 121.4 | 143.0 | 116.8 | 140.8 | 112.8 | 139.2 | 108.0 | 136.8 | 102.0 | 134.4 | 95.5 | 131.5 | 89.5 | 129.1 | 83.0 | 126.2 | 77.0 | 123.8 | |
170 | 131.4 | 153.0 | 126.8 | 150.8 | 122.8 | 149.2 | 118.0 | 146.8 | 112.0 | 144.4 | 105.5 | 141.5 | 99.5 | 139.1 | 93.0 | 136.2 | 87.0 | 133.8 | |
180 | 141.4 | 163.0 | 136.8 | 160.8 | 132.8 | 159.2 | 128.0 | 156.8 | 122.0 | 154.4 | 115.5 | 151.5 | 109.5 | 149.1 | 103.0 | 146.2 | 97.0 | 143.8 | |
190 | 151.4 | 173.0 | 146.8 | 170.8 | 142.8 | 169.2 | 138.0 | 166.8 | 132.0 | 164.4 | 125.5 | 161.5 | 119.5 | 159.1 | 113.0 | 156.2 | 107.0 | 153.8 | |
200 | 161.4 | 183.0 | 156.8 | 180.8 | 152.8 | 179.2 | 148.0 | 176.8 | 142.0 | 174.4 | 135.5 | 171.5 | 129.5 | 169.1 | 123.0 | 166.2 | 117.0 | 163.8 | |
220 | x | x | x | x | x | x | x | x | 162.0 | 194.4 | 155.5 | 191.5 | 149.5 | 189.1 | 143.0 | 186.2 | 137.0 | 183.8 | |
240 | x | x | x | x | x | x | x | x | 182.0 | 214.4 | 175.5 | 211.5 | 169.5 | 209.1 | 163.0 | 206.2 | 157.0 | 203.8 | |
L | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 |
上表は被締結体をボルトとタップ穴のようなめねじで挟んで固定する場合に、ボルトの呼び・長さと、被締結体の厚さの範囲の関係をまとめた表です。
この項では被締結体とボルトの間にみがき丸座金(1963年版、通称JIS大ワッシャー)1枚を挟むときの寸法を示しています。ボルトの長さLは附属書六角ボルトの長さを基準としています。被締結体の厚さの最大値Xmaxは、ボルトの先端がめねじに0.8d(ボルトの呼び径の0.8倍、概ね六角ナットの厚さ)だけ挿入するときの寸法です。最小値Xminは、ボルトの先端がめねじに最大2d(ボルトの呼び径の2倍)まで挿入するときの寸法です。挿入深さが0.8dを越え、2dに達するまでに被締結体の厚さが0となるときは0と表示しています。
上表では各部品の各寸法の公差は考慮していません。参考程度に、六角ボルト(附属書、仕上げ程度上・中)の長さには下表のような許容差が設けられています。座金や被締結体も含めた公差を考慮し、ちょどよい長さのボルトを選びましょう。実際市販されているボルトの長さは、規格表の推奨長さよりも種類が多いことがあります。しかし規格外の長さは常に在庫があるとは限りませんので、よほど特別な理由がなければ推奨長さから選びたいところです。
ボルトのL長さ mm | 呼びM3-M24 L寸法許容差 ±mm | 呼びM27-M80 L寸法許容差 ±mm |
---|---|---|
L <= 50 | 0.5 | 0.8 |
30 < L <= 50 | 0.7 | 1.1 |
120 < L <= 250 | 0.9 | 1.4 |
250 < L | 1.2 | 1.8 |