普通螺纹基本尺寸【GB/T 196-2025】- 易紧通

1 基本尺寸

普通螺纹基本尺寸位置见图 1，基本尺寸值应符合表 1 的规定。

表 1 内 D₂、d₂、D₁ 和 d₃ 数值按下列公式计算，计算结果修约至小数点后第三位。

D₂ = D - 2 × (3H / 8) = D - 0.649519 P

d₂ = d - 2 × (3H / 8) = d - 0.649519 P

D₁ = d - 2 × H₁ = d - 1.082532 P

d₃ = d - 2 × h₃ = d - 1.226869 P

图 1 设计牙型上的基本尺寸

注：1 — 内螺纹；2 — 外螺纹。

表 1 普通螺纹基本尺寸

单位为毫米

公称直径 (大径) D、d	螺距 P	中径 D₂、d₂	小径
公称直径 (大径) D、d	螺距 P	中径 D₂、d₂	内螺纹 (平牙顶) D₁	外螺纹 (圆弧牙底) d₃
1	0.2	0.870	0.783	0.755
1	0.25	0.838	0.729	0.693
1.1	0.2	0.970	0.883	0.855
1.1	0.25	0.938	0.829	0.793
1.2	0.2	1.070	0.983	0.955
1.2	0.25	1.038	0.929	0.893
1.4	0.2	1.270	1.183	1.155
1.4	0.3	1.205	1.075	1.032
1.6	0.2	1.470	1.383	1.355
1.6	0.35	1.373	1.221	1.171
1.8	0.2	1.670	1.583	1.555
1.8	0.35	1.573	1.421	1.371
2	0.25	1.838	1.729	1.693
2	0.4	1.740	1.567	1.509
2.2	0.25	2.038	1.929	1.893
2.2	0.45	1.908	1.713	1.648
2.5	0.35	2.273	2.121	2.071
2.5	0.45	2.208	2.013	1.948
3	0.35	2.773	2.621	2.571
3	0.5	2.675	2.459	2.387
3.5	0.35	3.273	3.121	3.071
3.5	0.6	3.110	2.850	2.764
4	0.5	3.675	3.459	3.387
4	0.7	3.545	3.242	3.141
4.5	0.5	4.175	3.959	3.887
4.5	0.75	4.013	3.688	3.580
5	0.5	4.675	4.459	4.387
5	0.8	4.480	4.134	4.019
5.5	0.5	5.175	4.959	4.887
6	0.75	5.513	5.188	5.080
6	1	5.350	4.917	4.773
7	0.75	6.513	6.188	6.080
7	1	6.350	5.917	5.773
8	0.75	7.513	7.188	7.080
	1	7.350	6.917	6.773
	1.25	7.188	6.647	6.466
9	0.75	8.513	8.188	8.080
	1	8.350	7.917	7.773
	1.25	8.188	7.647	7.466
10	0.75	9.513	9.188	9.080
	1	9.350	8.917	8.773
	1.25	9.188	8.647	8.466
	1.5	9.026	8.376	8.160
11	0.75	10.513	10.188	10.080
	1	10.350	9.917	9.773
	1.5	10.026	9.376	9.160
12	1	11.350	10.917	10.773
	1.25	11.188	10.647	10.466
	1.5	11.026	10.376	10.160
	1.75	10.863	10.106	9.853
14	1	13.350	12.917	12.773
	1.5	13.026	12.376	12.160
	2	12.701	11.835	11.546
15	1	14.350	13.917	13.773
15	1.5	14.026	13.376	13.160
16	1	15.350	14.917	14.773
	1.5	15.026	14.376	14.160
	2	14.701	13.835	13.546
17	1	16.350	15.917	15.773
17	1.5	16.026	15.376	15.160
18	1	17.350	16.917	16.773
	1.5	17.026	16.376	16.160
	2	16.701	15.835	15.546
	2.5	16.376	15.294	14.933
20	1	19.350	18.917	18.773
	1.5	19.026	18.376	18.160
	2	18.701	17.835	17.546
	2.5	18.376	17.294	16.933
22	1	21.350	20.917	20.773
	1.5	21.026	20.376	20.160
	2	20.701	19.835	19.546
	2.5	20.376	19.294	18.933
24	1	23.350	22.917	22.773
	1.5	23.026	22.376	22.160
	2	22.701	21.835	21.546
	3	22.051	20.752	20.319
25	1	24.350	23.917	23.773
	1.5	24.026	23.376	23.160
	2	23.701	22.835	22.546
26	1.5	25.026	24.376	24.160
27	1	26.350	25.917	25.773
	1.5	26.026	25.376	25.160
	2	25.701	24.835	24.546
	3	25.051	23.752	23.319
28	1	27.350	26.917	26.773
	1.5	27.026	26.376	26.160
	2	26.701	25.835	25.546
30	1	29.350	28.917	28.773
	1.5	29.026	28.376	28.160
	2	28.701	27.835	27.546
	3	28.051	26.752	26.319
	3.5	27.727	26.211	25.706
32	1.5	31.026	30.376	30.160
32	2	30.701	29.835	29.546
33	1.5	32.026	31.376	31.160
	2	31.701	30.835	30.546
	3	31.051	29.752	29.319
	3.5	30.727	29.211	28.706
36	1.5	35.026	34.376	34.160
	2	34.701	33.835	33.546
	3	34.051	32.752	32.319
	4	33.402	31.670	31.093
38	1.5	37.026	36.376	36.160
39	1.5	38.026	37.376	37.160
	2	37.701	36.835	36.546
	3	37.051	35.752	35.319
	4	36.402	34.670	34.093
40	1.5	39.026	38.376	38.160
	2	38.701	37.835	37.546
	3	38.051	36.752	36.319
42	1.5	41.026	40.376	40.160
	2	40.701	39.835	39.546
	3	40.051	38.752	38.319
	4	39.402	37.670	37.093
	4.5	39.077	37.129	36.479
45	1.5	44.026	43.376	43.160
	2	43.701	42.835	42.546
	3	43.051	41.752	41.319
	4	42.402	40.670	40.093
	4.5	42.077	40.129	39.479
48	1.5	47.026	46.376	46.160
	2	46.701	45.835	45.546
	3	46.051	44.752	44.319
	4	45.402	43.670	43.093
	5	44.752	42.587	41.866
50	1.5	49.026	48.376	48.160
	2	48.701	47.835	47.546
	3	48.051	46.752	46.319
52	1.5	51.026	50.376	50.160
	2	50.701	49.835	49.546
	3	50.051	48.752	48.319
	4	49.402	47.670	47.093
	5	48.752	46.587	45.866
55	1.5	54.026	53.376	53.160
	2	53.701	52.835	52.546
	3	53.051	51.752	51.319
	4	52.402	50.670	50.093
56	1.5	55.026	54.376	54.160
	2	54.701	53.835	53.546
	3	54.051	52.752	52.319
	4	53.402	51.670	51.093
	5.5	52.428	50.046	49.252
58	1.5	57.026	56.376	56.160
	2	56.701	55.835	55.546
	3	56.051	54.752	54.319
	4	55.402	53.670	53.093
60	1.5	59.026	58.376	58.160
	2	58.701	57.835	57.546
	3	58.051	56.752	56.319
	4	57.402	55.670	55.093
	5.5	56.428	54.046	53.252
62	1.5	61.026	60.376	60.160
	2	60.701	59.835	59.546
	3	60.051	58.752	58.319
	4	59.402	57.670	57.093
64	1.5	63.026	62.376	62.160
	2	62.701	61.835	61.546
	3	62.051	60.752	60.319
	4	61.402	59.670	59.093
	6	60.103	57.505	56.639
65	1.5	64.026	63.376	63.160
	2	63.701	62.835	62.546
	3	63.051	61.752	61.319
	4	62.402	60.670	60.093
68	1.5	67.026	66.376	66.160
	2	66.701	65.835	65.546
	3	66.051	64.752	64.319
	4	65.402	63.670	63.093
	6	64.103	61.505	60.639
70	1.5	69.026	68.376	68.160
	2	68.701	67.835	67.546
	3	68.051	66.752	66.319
	4	67.402	65.670	65.093
	6	66.103	63.505	62.639
72	1.5	71.026	70.376	70.160
	2	70.701	69.835	69.546
	3	70.051	68.752	68.319
	4	69.402	67.670	67.093
	6	68.103	65.505	64.639
75	1.5	74.026	73.376	73.160
	2	73.701	72.835	72.546
	3	73.051	71.752	71.319
	4	72.402	70.670	70.093
76	1.5	75.026	74.376	74.160
	2	74.701	73.835	73.546
	3	74.051	72.752	72.319
	4	73.402	71.670	71.093
	6	72.103	69.505	68.639
78	2	76.701	75.835	75.546
80	1.5	79.026	78.376	78.160
	2	78.701	77.835	77.546
	3	78.051	76.752	76.319
	4	77.402	75.670	75.093
	6	76.103	73.505	72.639
82	2	80.701	79.835	79.546
85	2	83.701	82.835	82.546
	3	83.051	81.752	81.319
	4	82.402	80.670	80.093
	6	81.103	78.505	77.639
90	2	88.701	87.835	87.546
	3	88.051	86.752	86.319
	4	87.402	85.670	85.093
	6	86.103	83.505	82.639
95	2	93.701	92.835	92.546
	3	93.051	91.752	91.319
	4	92.402	90.670	90.093
	6	91.103	88.505	87.639
100	2	98.701	97.835	97.546
	3	98.051	96.752	96.319
	4	97.402	95.670	95.093
	6	96.103	93.505	92.639
105	2	103.701	102.835	102.546
	3	103.051	101.752	101.319
	4	102.402	100.670	100.093
	6	101.103	98.505	97.639
110	2	108.701	107.835	107.546
	3	108.051	106.752	106.319
	4	107.402	105.670	105.093
	6	106.103	103.505	102.639
115	2	113.701	112.835	112.546
	3	113.051	111.752	111.319
	4	112.402	110.670	110.093
	6	111.103	108.505	107.639
120	2	118.701	117.835	117.546
	3	118.051	116.752	116.319
	4	117.402	115.670	115.093
	6	116.103	113.505	112.639
125	2	123.701	122.835	122.546
	3	123.051	121.752	121.319
	4	122.402	120.670	120.093
	6	121.103	118.505	117.639
	8	119.804	116.340	115.185
130	2	128.701	127.835	127.546
	3	128.051	126.752	126.319
	4	127.402	125.670	125.093
	6	126.103	123.505	122.639
	8	124.804	121.340	120.185
135	2	133.701	132.835	132.546
	3	133.051	131.752	131.319
	4	132.402	130.670	130.093
	6	131.103	128.505	127.639
140	2	138.701	137.835	137.546
	3	138.051	136.752	136.319
	4	137.402	135.670	135.093
	6	136.103	133.505	132.639
	8	134.804	131.340	130.185
145	2	143.701	142.835	142.546
	3	143.051	141.752	141.319
	4	142.402	140.670	140.093
	6	141.103	138.505	137.639
150	2	148.701	147.835	147.546
	3	148.051	146.752	146.319
	4	147.402	145.670	145.093
	6	146.103	143.505	142.639
	8	144.804	141.340	140.185
155	3	153.051	151.752	151.319
	4	152.402	150.670	150.093
	6	151.103	148.505	147.639
160	3	158.051	156.752	156.319
	4	157.402	155.670	155.093
	6	156.103	153.505	152.639
	8	154.804	151.340	150.185
165	3	163.051	161.752	161.319
	4	162.402	160.670	160.093
	6	161.103	158.505	157.639
170	3	168.051	166.752	166.319
	4	167.402	165.670	165.093
	6	166.103	163.505	162.639
	8	164.804	161.340	160.185
175	3	173.051	171.752	171.319
	4	172.402	170.670	170.093
	6	171.103	168.505	167.639
180	3	178.051	176.752	176.319
	4	177.402	175.670	175.093
	6	176.103	173.505	172.639
	8	174.804	171.340	170.185
185	3	183.051	181.752	181.319
	4	182.402	180.670	180.093
	6	181.103	178.505	177.639
190	3	188.051	186.752	186.319
	4	187.402	185.670	185.093
	6	186.103	183.505	182.639
	8	184.804	181.340	180.185
195	3	193.051	191.752	191.319
	4	192.402	190.670	190.093
	6	191.103	188.505	187.639
200	3	198.051	196.752	196.319
	4	197.402	195.670	195.093
	6	196.103	193.505	192.639
	8	194.804	191.340	190.185
205	3	203.051	201.752	201.319
	4	202.402	200.670	200.093
	6	201.103	198.505	197.639
210	3	208.051	206.752	206.319
	4	207.402	205.670	205.093
	6	206.103	203.505	202.639
	8	204.804	201.340	200.185
215	3	213.051	211.752	211.319
	4	212.402	210.670	210.093
	6	211.103	208.505	207.639
220	3	218.051	216.752	216.319
	4	217.402	215.670	215.093
	6	216.103	213.505	212.639
	8	214.804	211.340	210.185
225	3	223.051	221.752	221.319
	4	222.402	220.670	220.093
	6	221.103	218.505	217.639
230	3	228.051	226.752	226.319
	4	227.402	225.670	225.093
	6	226.103	223.505	222.639
	8	224.804	221.340	220.185
235	3	233.051	231.752	231.319
	4	232.402	230.670	230.093
	6	231.103	228.505	227.639
240	3	238.051	236.752	236.319
	4	237.402	235.670	235.093
	6	236.103	233.505	232.639
	8	234.804	231.340	230.185
245	3	243.051	241.752	241.319
	4	242.402	240.670	240.093
	6	241.103	238.505	237.639
250	3	248.051	246.752	246.319
	4	247.402	245.670	245.093
	6	246.103	243.505	242.639
	8	244.804	241.340	240.185
255	4	252.402	250.670	250.093
255	6	251.103	248.505	247.639
260	4	257.402	255.670	255.093
	6	256.103	253.505	252.639
	8	254.804	251.340	250.185
265	4	262.402	260.670	260.093
265	6	261.103	258.505	257.639
270	4	267.402	265.670	265.093
	6	266.103	263.505	262.639
	8	264.804	261.340	260.185
275	4	272.402	270.670	270.093
275	6	271.103	268.505	267.639
280	4	277.402	275.670	275.093
	6	276.103	273.505	272.639
	8	274.804	271.340	270.185
285	4	282.402	280.670	280.093
285	6	281.103	278.505	277.639
290	4	287.402	285.670	285.093
	6	286.103	283.505	282.639
	8	284.804	281.340	280.185
295	4	292.402	290.670	290.093
295	6	291.103	288.505	287.639
300	4	297.402	295.670	295.093
	6	296.103	293.505	292.639
	8	294.804	291.340	290.185

	锯齿形（3°、30°）螺纹第1部分：牙型
	米制AB型 B型自攻螺纹及末端 [ASME B 18.6.5M]
	米制D型 F型 T型自攻切削锁紧螺纹及末端 [ASME B 18.6.5M]
	普通螺纹基本牙型（GB/T 192-2003）
	普通螺纹 - 直径与螺距 (GB/T 193 - 2003, 修改采用 ISO 261-1998）
	55°密封管螺纹 - 圆柱內螺纹与圆锥外螺纹 (GB/T 7306.1-2000)
	55°密封管螺纹 - 圆锥内螺纹与圆锥外螺纹（GB/T 7306.2-2000）
	60°米制密封螺纹（GB/T 1415-2008）
	60°干密封管螺纹 (GB/T 27944-2011)
	米制BF型 BT型自攻切削锁紧螺纹及末端 [ASME B 18.6.5M]
	普通螺纹粗糙精度优选系列的极限尺寸（GB/T 9146-2003）
	普通螺纹中等精度、优选系列的极限尺寸（GB/T 9145 - 2003）
	30°楔形防松螺纹
	普通螺纹基本尺寸 GB/T 196-2003
	普通螺纹公差 GB 197-2018
	普通螺纹极限偏差 GB/T 2516-2003
	普通螺纹牙型【GB/T 192-2025】
	普通螺纹基本尺寸【GB/T 196-2025】
	[BS 4174 TABLE 23] 英制A型自攻螺纹
	梯形螺纹 - 基本牙型
	梯形螺纹 - 设计牙型
	小螺纹 - 直径与螺距系列和基本尺寸
	小螺纹：牙型尺寸
	小螺纹 - 3G5 3G6 内螺纹极限尺寸
	小螺纹 - 4H5 4H6 内螺纹极限尺寸
	小螺纹 - 5h3 外螺纹极限尺寸
	木螺钉技术条件
	SAE J81 自挤自攻螺钉的尺寸要求
	[BS 4174 TABLE 5] 英制自攻螺纹AB型, B型末端以及BT型切削螺纹
	[BS 4174 TABLE 6] 英制Y型切削螺纹
	[BS 4174 TABLE 7] 英制T型和D型切削螺纹(统一螺纹)
	ST 自攻螺纹
	NPT 圆锥管螺纹的基本尺寸
	NST 塑料(尼龙)用自攻螺钉螺纹
	55°非密封管螺纹