螺栓中心孔的各种类型

Type R,radius form, without protective chamfer

d1 0.5 0.8 1 1.25 1.6 2 2.5 3.15 4 5 6.3 8 10 12.5
d2 1.06 1.7 2.12 2.65 3.35 4.25 5.3 6.7 8.5 10.6 13.2 17 21.2 26.5
t min 1.4 1.5 1.9 2.3 2.9 3.7 4.6 5.8 7.4 9.2 11.4 14.7 18.3 23.6
a 2 2.5 3 4 5 6 7 9 11 14 18 22 28 36

Type A,straight form, without protective chamf

d1 0.5 0.8 1 1.25 1.6 2 2.5 3.15 4 5 6.3 8 10 12.5 16 20 25 31.5 40 50
d2 1.06 1.7 2.12 2.65 3.35 4.25 5.3 6.7 8.5 10.6 13.2 17 21.2 26.5 33.5 42.5 53 67 85 106
t max / / / / / / / / / / / / / / 37.5 47.5 60 75 95 118
min 1 1.5 1.9 2.3 2.9 3.7 4.6 5.9 7.4 9.2 11.5 14.8 18.4 23.6 30 37.5 47.5 60 75 95
伪1 / / / / / / / / / / / / / / 120掳
伪2 (0, -1掳) / / / / / / / / / / / / / / 60掳
a 2 2.5 3 4 5 6 7 9 11 14 18 22 28 36 45 56 71 90 112 140

Type B,straight form, with conical protective chamfer

d1 1 1.25 1.6 2 2.5 3.15 4 5 6.3 8 10 12.5 16 20 25 31.5 40 50
d2 2.12 2.65 3.35 4.25 5.3 6.7 8.5 10.6 13.2 17 21.2 26.5 33.5 42.5 53 67 85 106
b 0.3 0.4 0.5 0.6 0.8 0.9 1.2 1.6 1.4 1.6 2 2 2.6 3 2.9 3.8 4.3 5.5
d3 3.15 4 5 6.3 8 10 12.5 16 18 22.4 28 33.5 42.5 53 63 80 100 125
t max / / / / / / / / / / / 32.1 40.1 50.5 62.9 73.8 99.3 123.5
min 2.2 2.7 3.4 4.3 5.4 6.8 8.6 10.8 12.9 16.4 20.4 25.6 32.6 40.5 50.4 63.8 79.3 100.5
a 3.5 4.5 5.5 6.6 8.3 10 12.7 15.6 20 25 31 38 48 60 75 95 118 150
伪1 / / / / / / / / / / / 120掳
伪2 (0, -1掳) / / / / / / / / / / / 60掳
伪3聽 / / / / / / / / / / / 120掳

Type C,straight form, with truncated protective chamfer (left unspecified in ISO Standard)

d1 1 1.25 1.6 2 2.5 3.15 4 5 6.3 8 10 12.5 16 20 25 31.5 40 50
d2 2.12 2.65 3.35 4.25 5.3 6.7 8.5 10.6 13.2 17 21.2 26.5 33.5 42.5 53 67 85 106
b 0.4 0.6 0.7 0.9 0.9 1.1 1.7 1.7 2.3 3 3.9 4.3 6.1 7.8 8.7 11.3 17.3 17.3
d4 4.5 5.3 6.3 7.5 9 11.2 14 18 22.4 28 35.5 45 56 71 90 112 140 180
d5 5 6 7.1 8.5 10 12.5 16 20 25 31.5 40 50 63 80 100 125 160 200
t max / / / / / / / / / / / / 37.5 47.5 60 75 95 118
min 1.9 2.3 2.9 3.7 4.6 5.9 7.4 9.2 11.5 14.8 18.4 23.6 30 37.5 47.5 60 75 95
a 3.5 4.5 5.5 6.6 8.3 10 12.7 15.6 20 25 31 42.5 53 67 85 106 132 170