
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 | 1.4 | 0 | 0.9 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | |
6 | 0 | 2.4 | 0 | 1.9 | 0 | 1.0 | 0 | 0.4 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | |
7 | * | 0 | 3.4 | 0 | 2.9 | 0 | 2.0 | 0 | 1.4 | 0 | 0.7 | x | x | x | x | x | x | x | x | x | x | x | x |
8 | 0.8 | 4.4 | 0 | 3.9 | 0 | 3.0 | 0 | 2.4 | 0 | 1.7 | 0 | 0.1 | x | x | x | x | x | x | x | x | x | x | |
9 | * | 1.8 | 5.4 | 0.7 | 4.9 | 0 | 4.0 | 0 | 3.4 | 0 | 2.7 | 0 | 1.1 | x | x | x | x | x | x | x | x | x | x |
10 | 2.8 | 6.4 | 1.7 | 5.9 | 0.2 | 5.0 | 0 | 4.4 | 0 | 3.7 | 0 | 2.1 | x | x | x | x | x | x | x | x | x | x | |
11 | * | 3.8 | 7.4 | 2.7 | 6.9 | 1.2 | 6.0 | 0.0 | 5.4 | 0 | 4.7 | 0 | 3.1 | 0 | 1.0 | x | x | x | x | x | x | x | x |
12 | 4.8 | 8.4 | 3.7 | 7.9 | 2.2 | 7.0 | 1.0 | 6.4 | 0 | 5.7 | 0 | 4.1 | 0 | 2.0 | x | x | x | x | x | x | x | x | |
14 | 6.8 | 10.4 | 5.7 | 9.9 | 4.2 | 9.0 | 3.0 | 8.4 | 1.7 | 7.7 | 0 | 6.1 | 0 | 4.0 | 0 | 1.5 | x | x | x | x | x | x | |
16 | 8.8 | 12.4 | 7.7 | 11.9 | 6.2 | 11.0 | 5.0 | 10.4 | 3.7 | 9.7 | 0.9 | 8.1 | 0 | 6.0 | 0 | 3.5 | x | x | x | x | x | x | |
18 | * | 10.8 | 14.4 | 9.7 | 13.9 | 8.2 | 13.0 | 7.0 | 12.4 | 5.7 | 11.7 | 2.9 | 10.1 | 0 | 8.0 | 0 | 5.5 | 0 | 2.9 | x | x | x | x |
20 | 12.8 | 16.4 | 11.7 | 15.9 | 10.2 | 15.0 | 9.0 | 14.4 | 7.7 | 13.7 | 4.9 | 12.1 | 0.4 | 10.0 | 0 | 7.5 | 0 | 4.9 | 0 | 2.8 | x | x | |
22 | * | 14.8 | 18.4 | 13.7 | 17.9 | 12.2 | 17.0 | 11.0 | 16.4 | 9.7 | 15.7 | 6.9 | 14.1 | 2.4 | 12.0 | 0 | 9.5 | 0 | 6.9 | 0 | 4.8 | 0 | 2.2 |
25 | 17.8 | 21.4 | 16.7 | 20.9 | 15.2 | 20.0 | 14.0 | 19.4 | 12.7 | 18.7 | 9.9 | 17.1 | 5.4 | 15.0 | 0.5 | 12.5 | 0 | 9.9 | 0 | 7.8 | 0 | 5.2 | |
28 | * | 20.8 | 24.4 | 19.7 | 23.9 | 18.2 | 23.0 | 17.0 | 22.4 | 15.7 | 21.7 | 12.9 | 20.1 | 8.4 | 18.0 | 3.5 | 15.5 | 0 | 12.9 | 0 | 10.8 | 0 | 8.2 |
30 | 22.8 | 26.4 | 21.7 | 25.9 | 20.2 | 25.0 | 19.0 | 24.4 | 17.7 | 23.7 | 14.9 | 22.1 | 10.4 | 20.0 | 5.5 | 17.5 | 0.5 | 14.9 | 0 | 12.8 | 0 | 10.2 | |
32 | * | 24.8 | 28.4 | 23.7 | 27.9 | 22.2 | 27.0 | 21.0 | 26.4 | 19.7 | 25.7 | 16.9 | 24.1 | 12.4 | 22.0 | 7.5 | 19.5 | 2.5 | 16.9 | 0 | 14.8 | 0 | 12.2 |
35 | x | x | x | x | 25.2 | 30.0 | 24.0 | 29.4 | 22.7 | 28.7 | 19.9 | 27.1 | 15.4 | 25.0 | 10.5 | 22.5 | 5.5 | 19.9 | 1.0 | 17.8 | 0 | 15.2 | |
38 | * | x | x | x | x | 28.2 | 33.0 | 27.0 | 32.4 | 25.7 | 31.7 | 22.9 | 30.1 | 18.4 | 28.0 | 13.5 | 25.5 | 8.5 | 22.9 | 4.0 | 20.8 | 0 | 18.2 |
40 | x | x | x | x | 30.2 | 35.0 | 29.0 | 34.4 | 27.7 | 33.7 | 24.9 | 32.1 | 20.4 | 30.0 | 15.5 | 27.5 | 10.5 | 24.9 | 6.0 | 22.8 | 1.0 | 20.2 | |
45 | x | x | x | x | x | x | x | x | 32.7 | 38.7 | 29.9 | 37.1 | 25.4 | 35.0 | 20.5 | 32.5 | 15.5 | 29.9 | 11.0 | 27.8 | 6.0 | 25.2 | |
50 | x | x | x | x | x | x | x | x | 37.7 | 43.7 | 34.9 | 42.1 | 30.4 | 40.0 | 25.5 | 37.5 | 20.5 | 34.9 | 16.0 | 32.8 | 11.0 | 30.2 | |
55 | x | x | x | x | x | x | x | x | x | x | 39.9 | 47.1 | 35.4 | 45.0 | 30.5 | 42.5 | 25.5 | 39.9 | 21.0 | 37.8 | 16.0 | 35.2 | |
60 | x | x | x | x | x | x | x | x | x | x | 44.9 | 52.1 | 40.4 | 50.0 | 35.5 | 47.5 | 30.5 | 44.9 | 26.0 | 42.8 | 21.0 | 40.2 | |
65 | x | x | x | x | x | x | x | x | x | x | 49.9 | 57.1 | 45.4 | 55.0 | 40.5 | 52.5 | 35.5 | 49.9 | 31.0 | 47.8 | 26.0 | 45.2 | |
70 | x | x | x | x | x | x | x | x | x | x | 54.9 | 62.1 | 50.4 | 60.0 | 45.5 | 57.5 | 40.5 | 54.9 | 36.0 | 52.8 | 31.0 | 50.2 | |
75 | x | x | x | x | x | x | x | x | x | x | x | x | 55.4 | 65.0 | 50.5 | 62.5 | 45.5 | 59.9 | 41.0 | 57.8 | 36.0 | 55.2 | |
80 | x | x | x | x | x | x | x | x | x | x | x | x | 60.4 | 70.0 | 55.5 | 67.5 | 50.5 | 64.9 | 46.0 | 62.8 | 41.0 | 60.2 | |
85 | x | x | x | x | x | x | x | x | x | x | x | x | 65.4 | 75.0 | 60.5 | 72.5 | 55.5 | 69.9 | 51.0 | 67.8 | 46.0 | 65.2 | |
90 | x | x | x | x | x | x | x | x | x | x | x | x | 70.4 | 80.0 | 65.5 | 77.5 | 60.5 | 74.9 | 56.0 | 72.8 | 51.0 | 70.2 | |
95 | * | x | x | x | x | x | x | x | x | x | x | x | x | 75.4 | 85.0 | 70.5 | 82.5 | 65.5 | 79.9 | 61.0 | 77.8 | 56.0 | 75.2 |
100 | x | x | x | x | x | x | x | x | x | x | x | x | 80.4 | 90.0 | 75.5 | 87.5 | 70.5 | 84.9 | 66.0 | 82.8 | 61.0 | 80.2 | |
105 | * | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 75.5 | 89.9 | 71.0 | 87.8 | 66.0 | 85.2 |
110 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 80.5 | 94.9 | 76.0 | 92.8 | 71.0 | 90.2 | |
115 | * | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 85.5 | 99.9 | 81.0 | 97.8 | 76.0 | 95.2 |
120 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 90.5 | 104.9 | 86.0 | 102.8 | 81.0 | 100.2 | |
125 | * | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 95.5 | 109.9 | 91.0 | 107.8 | 86.0 | 105.2 |
130 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 100.5 | 114.9 | 96.0 | 112.8 | 91.0 | 110.2 | |
140 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | 110.5 | 124.9 | 106.0 | 122.8 | 101.0 | 120.2 | |
L | (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 | 3.0 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | |
28 | * | 0 | 6.0 | 0 | 3.9 | 0 | 1.8 | x | x | x | x | x | x | x | x | x | x | x | x |
30 | 0 | 8.0 | 0 | 5.9 | 0 | 3.8 | 0 | 0.9 | x | x | x | x | x | x | x | x | x | x | |
32 | * | 0 | 10.0 | 0 | 7.9 | 0 | 5.8 | 0 | 2.9 | x | x | x | x | x | x | x | x | x | x |
35 | 0 | 13.0 | 0 | 10.9 | 0 | 8.8 | 0 | 5.9 | 0 | 2.6 | x | x | x | x | x | x | x | x | |
38 | * | 0 | 16.0 | 0 | 13.9 | 0 | 11.8 | 0 | 8.9 | 0 | 5.6 | x | x | x | x | x | x | x | x |
40 | 0 | 18.0 | 0 | 15.9 | 0 | 13.8 | 0 | 10.9 | 0 | 7.6 | 0 | 4.5 | x | x | x | x | x | x | |
45 | 1.4 | 23.0 | 0 | 20.9 | 0 | 18.8 | 0 | 15.9 | 0 | 12.6 | 0 | 9.5 | 0 | 5.4 | x | x | x | x | |
50 | 6.4 | 28.0 | 1.9 | 25.9 | 0 | 23.8 | 0 | 20.9 | 0 | 17.6 | 0 | 14.5 | 0 | 10.4 | 0 | 7.2 | 0 | 3.3 | |
55 | 11.4 | 33.0 | 6.9 | 30.9 | 2.4 | 28.8 | 0 | 25.9 | 0 | 22.6 | 0 | 19.5 | 0 | 15.4 | 0 | 12.2 | 0 | 8.3 | |
60 | 16.4 | 38.0 | 11.9 | 35.9 | 7.4 | 33.8 | 2.1 | 30.9 | 0 | 27.6 | 0 | 24.5 | 0 | 20.4 | 0 | 17.2 | 0 | 13.3 | |
65 | 21.4 | 43.0 | 16.9 | 40.9 | 12.4 | 38.8 | 7.1 | 35.9 | 0.2 | 32.6 | 0 | 29.5 | 0 | 25.4 | 0 | 22.2 | 0 | 18.3 | |
70 | 26.4 | 48.0 | 21.9 | 45.9 | 17.4 | 43.8 | 12.1 | 40.9 | 5.2 | 37.6 | 0 | 34.5 | 0 | 30.4 | 0 | 27.2 | 0 | 23.3 | |
75 | 31.4 | 53.0 | 26.9 | 50.9 | 22.4 | 48.8 | 17.1 | 45.9 | 10.2 | 42.6 | 3.5 | 39.5 | 0 | 35.4 | 0 | 32.2 | 0 | 28.3 | |
80 | 36.4 | 58.0 | 31.9 | 55.9 | 27.4 | 53.8 | 22.1 | 50.9 | 15.2 | 47.6 | 8.5 | 44.5 | 0.8 | 40.4 | 0 | 37.2 | 0 | 33.3 | |
85 | 41.4 | 63.0 | 36.9 | 60.9 | 32.4 | 58.8 | 27.1 | 55.9 | 20.2 | 52.6 | 13.5 | 49.5 | 5.8 | 45.4 | 0 | 42.2 | 0 | 38.3 | |
90 | 46.4 | 68.0 | 41.9 | 65.9 | 37.4 | 63.8 | 32.1 | 60.9 | 25.2 | 57.6 | 18.5 | 54.5 | 10.8 | 50.4 | 4.0 | 47.2 | 0 | 43.3 | |
95 | * | 51.4 | 73.0 | 46.9 | 70.9 | 42.4 | 68.8 | 37.1 | 65.9 | 30.2 | 62.6 | 23.5 | 59.5 | 15.8 | 55.4 | 9.0 | 52.2 | 1.5 | 48.3 |
100 | 56.4 | 78.0 | 51.9 | 75.9 | 47.4 | 73.8 | 42.1 | 70.9 | 35.2 | 67.6 | 28.5 | 64.5 | 20.8 | 60.4 | 14.0 | 57.2 | 6.5 | 53.3 | |
105 | * | 61.4 | 83.0 | 56.9 | 80.9 | 52.4 | 78.8 | 47.1 | 75.9 | 40.2 | 72.6 | 33.5 | 69.5 | 25.8 | 65.4 | 19.0 | 62.2 | 11.5 | 58.3 |
110 | 66.4 | 88.0 | 61.9 | 85.9 | 57.4 | 83.8 | 52.1 | 80.9 | 45.2 | 77.6 | 38.5 | 74.5 | 30.8 | 70.4 | 24.0 | 67.2 | 16.5 | 63.3 | |
115 | * | 71.4 | 93.0 | 66.9 | 90.9 | 62.4 | 88.8 | 57.1 | 85.9 | 50.2 | 82.6 | 43.5 | 79.5 | 35.8 | 75.4 | 29.0 | 72.2 | 21.5 | 68.3 |
120 | 76.4 | 98.0 | 71.9 | 95.9 | 67.4 | 93.8 | 62.1 | 90.9 | 55.2 | 87.6 | 48.5 | 84.5 | 40.8 | 80.4 | 34.0 | 77.2 | 26.5 | 73.3 | |
125 | * | 81.4 | 103.0 | 76.9 | 100.9 | 72.4 | 98.8 | 67.1 | 95.9 | 60.2 | 92.6 | 53.5 | 89.5 | 45.8 | 85.4 | 39.0 | 82.2 | 31.5 | 78.3 |
130 | 86.4 | 108.0 | 81.9 | 105.9 | 77.4 | 103.8 | 72.1 | 100.9 | 65.2 | 97.6 | 58.5 | 94.5 | 50.8 | 90.4 | 44.0 | 87.2 | 36.5 | 83.3 | |
140 | 96.4 | 118.0 | 91.9 | 115.9 | 87.4 | 113.8 | 82.1 | 110.9 | 75.2 | 107.6 | 68.5 | 104.5 | 60.8 | 100.4 | 54.0 | 97.2 | 46.5 | 93.3 | |
150 | 106.4 | 128.0 | 101.9 | 125.9 | 97.4 | 123.8 | 92.1 | 120.9 | 85.2 | 117.6 | 78.5 | 114.5 | 70.8 | 110.4 | 64.0 | 107.2 | 56.5 | 103.3 | |
160 | 116.4 | 138.0 | 111.9 | 135.9 | 107.4 | 133.8 | 102.1 | 130.9 | 95.2 | 127.6 | 88.5 | 124.5 | 80.8 | 120.4 | 74.0 | 117.2 | 66.5 | 113.3 | |
170 | 126.4 | 148.0 | 121.9 | 145.9 | 117.4 | 143.8 | 112.1 | 140.9 | 105.2 | 137.6 | 98.5 | 134.5 | 90.8 | 130.4 | 84.0 | 127.2 | 76.5 | 123.3 | |
180 | 136.4 | 158.0 | 131.9 | 155.9 | 127.4 | 153.8 | 122.1 | 150.9 | 115.2 | 147.6 | 108.5 | 144.5 | 100.8 | 140.4 | 94.0 | 137.2 | 86.5 | 133.3 | |
190 | 146.4 | 168.0 | 141.9 | 165.9 | 137.4 | 163.8 | 132.1 | 160.9 | 125.2 | 157.6 | 118.5 | 154.5 | 110.8 | 150.4 | 104.0 | 147.2 | 96.5 | 143.3 | |
200 | 156.4 | 178.0 | 151.9 | 175.9 | 147.4 | 173.8 | 142.1 | 170.9 | 135.2 | 167.6 | 128.5 | 164.5 | 120.8 | 160.4 | 114.0 | 157.2 | 106.5 | 153.3 | |
220 | x | x | x | x | x | x | x | x | 155.2 | 187.6 | 148.5 | 184.5 | 140.8 | 180.4 | 134.0 | 177.2 | 126.5 | 173.3 | |
240 | x | x | x | x | x | x | x | x | 175.2 | 207.6 | 168.5 | 204.5 | 160.8 | 200.4 | 154.0 | 197.2 | 146.5 | 193.3 | |
L | (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(1970年版、通称ISO大ワッシャー)1枚とばね座金2号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 |