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1级标准系列统一螺纹的容隙和公差 in |
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|
公称直径 |
牙数 n |
系列代号 |
外螺纹容隙 es |
外螺纹 大径公差 |
中径公差 |
内螺纹 小径公差 |
|
|
1A |
1B |
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|
1/4 |
20 |
UNC |
0.0011 |
0.0122 |
0.0056 |
0.0073 |
0.0115 |
|
1/4 |
28 |
UNF |
0.0010 |
0.0098 |
0.0050 |
0.0065 |
0.0084 |
|
5/16 |
18 |
UNC |
0.0012 |
0.0131 |
0.0061 |
0.0079 |
0.0127 |
|
5/16 |
24 |
UNF |
0.0011 |
0.0108 |
0.0055 |
0.0071 |
0.0097 |
|
3/8 |
16 |
UNC |
0.0013 |
0.0142 |
0.0065 |
0.0085 |
0.0141 |
|
3/8 |
24 |
UNF |
0.0011 |
0.0108 |
0.0057 |
0.0074 |
0.0097 |
|
7/16 |
14 |
UNC |
0.0014 |
0.0155 |
0.0071 |
0.0092 |
0.0158 |
|
7/16 |
20 |
UNF |
0.0013 |
0.0122 |
0.0063 |
0.0081 |
0.0115 |
|
1/2 |
13 |
UNC |
0.0015 |
0.0163 |
0.0074 |
0.0097 |
0.0169 |
|
1/2 |
20 |
UNF |
0.0013 |
0.0122 |
0.0064 |
0.0084 |
0.0115 |
|
9/16 |
12 |
UNC |
0.0016 |
0.0172 |
0.0078 |
0.0102 |
0.0181 |
|
9/16 |
18 |
UNF |
0.0014 |
0.0131 |
0.0068 |
0.0089 |
0.0127 |
|
5/8 |
11 |
UNC |
0.0017 |
0.0182 |
0.0083 |
0.0107 |
0.0194 |
|
5/8 |
18 |
UNF |
0.0014 |
0.0131 |
0.0070 |
0.0091 |
0.0127 |
|
3/4 |
10 |
UNC |
0.0018 |
0.0194 |
0.0088 |
0.0115 |
0.0210 |
|
3/4 |
16 |
UNF |
0.0015 |
0.0142 |
0.0075 |
0.0098 |
0.0141 |
|
7/8 |
9 |
UNC |
0.0019 |
0.0208 |
0.0095 |
0.0123 |
0.0228 |
|
7/8 |
14 |
UNF |
0.0016 |
0.0155 |
0.0081 |
0.0106 |
0.0158 |
|
1 |
8 |
UNC |
0.0020 |
0.0225 |
0.0101 |
0.0132 |
0.0250 |
|
1 |
12 |
UNF |
0.0018 |
0.0172 |
0.0088 |
0.0114 |
0.0181 |
|
11/8 |
7 |
UNC |
0.0022 |
0.0246 |
0.0109 |
0.0141 |
0.0276 |
|
11/8 |
12 |
UNF |
0.0018 |
0.0172 |
0.0090 |
0.0117 |
0.0181 |
|
11/4 |
7 |
UNC |
0.0022 |
0.0246 |
0.0111 |
0.0144 |
0.0276 |
|
11/4 |
12 |
UNF |
0.0018 |
0.0172 |
0.0092 |
0.0120 |
0.0181 |
|
13/8 |
6 |
UNC |
0.0024 |
0.0273 |
0.0120 |
0.0155 |
0.0306 |
|
13/8 |
12 |
UNF |
0.0019 |
0.0172 |
0.0094 |
0.0123 |
0.0181 |
|
11/2 |
6 |
UNC |
0.0024 |
0.0273 |
0.0121 |
0.0158 |
0.0306 |
|
11/2 |
12 |
UNF |
0.0019 |
0.0172 |
0.0096 |
0.0125 |
0.0181 |
|
13/4 |
5 |
UNC |
0.0027 |
0.0308 |
0.0134 |
0.0174 |
0.0340 |
|
2 |
41/2 |
UNC |
0.0029 |
0.0330 |
0.0143 |
0.0186 |
0.0358 |
|
21/4 |
41/2 |
UNC |
0.0029 |
0.0330 |
0.0146 |
0.0190 |
0.0358 |
|
21/2 |
4 |
UNC |
0.0031 |
0.0357 |
0.0155 |
0.0202 |
0.0375 |
|
23/4 |
4 |
UNC |
0.0032 |
0.0357 |
0.0158 |
0.0206 |
0.0375 |
|
3 |
4 |
UNC |
0.0032 |
0.0357 |
0.0161 |
0.0209 |
0.0375 |
|
31/4 |
4 |
UNC |
0.0033 |
0.0357 |
0.0163 |
0.0212 |
0.0375 |
|
31/2 |
4 |
UNC |
0.0033 |
0.0357 |
0.0166 |
0.0215 |
0.0375 |
|
33/4 |
4 |
UNC |
0.0034 |
0.0357 |
0.0168 |
0.0218 |
0.0375 |
|
4 |
4 |
UNC |
0.0034 |
0.0357 |
0.0170 |
0.0221 |
0.0375 |
|
注：1.内螺纹大径最大可延伸至H/24削平高度处； 2.外螺纹小径最小可延伸至H/8削平高度处。 |
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