ISO 888 - 2012 Fasteners─Bolts,screws and studs─Nominal lengths and thread lengths

螺纹公称直径 d
Thread Diameter d

1.6 mm

2 mm

2.5 mm

3 mm

4 mm

5 mm

6 mm

8 mm

10 mm

12 mm

14 mm

16 mm

18 mm

20 mm

22 mm

L ≤ 125 mm	螺纹长度 b (mm)
125 < L ≤ 200 mm
L > 200 mm

9	10	11	12	14	16	18	22	26	30	34	38	42	46	50
/	/	/	/	/	/	/	28	32	36	40	44	48	52	56
/	/	/	/	/	/	/	/	/	/	/	57	61	65	69

螺纹公称直径 d
Thread Diameter d

24 mm

27 mm

30 mm

33 mm

36 mm

39 mm

42 mm

45 mm

48 mm

52 mm

56 mm

60 mm

64 mm

68 mm

72 mm

L ≤ 125 mm	螺纹长度 b (mm)
125 < L ≤ 200 mm
L > 200 mm

54	60	66	72	78	84	90	96	102	/	/	/	/	/	/
60	66	72	78	84	90	96	102	108	116	124	132	140	148	156
73	79	85	91	97	103	109	115	121	129	137	145	153	161	169

螺纹公称直径 d
Thread Diameter d

76 mm

80 mm

85 mm

90 mm

95 mm

100 mm

105 mm

110 mm

115 mm

120 mm

125 mm

130 mm

140 mm

150 mm

160 mm

L ≤ 125 mm	螺纹长度 b (mm)
125 < L ≤ 200 mm
L > 200 mm

/	/	/	/	/	/	/	/	/	/	/	/	/	/	/
164	172	182	192	/	/	/	/	/	/	/	/	/	/	/
177	185	195	205	215	225	235	245	255	265	275	285	305	325	345

①, 除产品标准另有规定外，螺纹长度尺寸 b （见表2）按以下公式计算：
—— L < 125 mm：b = 2d + 6 mm;
—— 125 mm < L ≤ 200 mm，b = 2d + 12 mm;
—— L > 200 mm，b = 2d + 25 mm。
计算时，杆部长度（无螺纹部分）≤ 0.5d 较短的螺栓，应制成全螺纹。
②, 开槽或凹槽螺钉和类似的螺钉（如按GB/T 5276 【ISO 225】的盘头、圆柱头、沉头）和螺柱，b 的公差为0 ~ +2b。

公称长度 L / mm
Norminal Length L / mm

(2.5)

(7)

(9)

(11)

(14)

最小值	A级
最大值
最小值	B级
最大值
最小值	C级
最大值

1.80	2.30	2.80	3.76	4.76	5.76	6.71	7.71	8.71	9.71	10.65	11.65	13.65
2.20	2.70	3.20	4.24	5.24	6.24	7.29	8.29	9.29	10.29	11.35	12.35	14.35
-	-	-	-	-	-	-	-	-	9.25	10.10	11.10	13.10
-	-	-	-	-	-	-	-	-	10.75	11.90	12.90	14.90
-	-	-	-	-	-	-	-	-	9.25	10.10	11.10	13.10
-	-	-	-	-	-	-	-	-	10.75	11.90	12.90	14.90

公称长度 L / mm
Norminal Length L / mm

(18)

(22)

(28)

(32)

(38)

最小值	A级
最大值
最小值	B级
最大值
最小值	C级
最大值

15.65	17.65	19.58	21.58	24.58	27.58	29.58	31.50	34.50	37.50	39.50	44.50	49.50
16.35	18.35	20.42	22.42	25.42	28.42	30.42	32.50	35.50	38.50	40.50	45.50	50.50
15.10	17.10	18.95	20.95	23.95	26.95	28.95	30.75	33.75	36.75	38.75	43.75	48.75
16.90	18.90	21.05	23.05	26.05	29.05	31.05	33.25	36.25	39.25	41.25	46.25	51.25
15.10	17.10	18.95	20.95	23.95	26.95	28.95	30.75	33.75	36.75	38.75	43.75	48.75
16.90	18.90	21.05	23.05	26.05	29.05	31.05	33.25	36.25	39.25	41.25	46.25	51.25

公称长度 L / mm
Norminal Length L / mm

(75)

(85)

(95)

100

(105)

110

(115)

最小值	A级
最大值
最小值	B级
最大值
最小值	C级
最大值

54.40	59.40	64.40	69.40	74.40	79.40	84.30	89.30	94.30	99.30	104.30	109.30	114.30
55.60	60.60	65.60	70.60	75.60	80.60	85.70	90.70	95.70	100.70	105.70	110.70	115.70
53.50	58.50	63.50	68.50	73.50	78.50	83.25	88.25	93.25	98.25	103.25	108.25	113.25
56.50	61.50	66.50	71.50	76.50	81.50	86.75	91.75	96.75	101.75	106.75	111.75	116.75
53.50	58.50	63.50	68.50	73.50	78.50	83.25	88.25	93.25	98.25	103.25	108.25	113.25
56.50	61.50	66.50	71.50	76.50	81.50	86.75	91.75	96.75	101.75	106.75	111.75	116.75

公称长度 L / mm
Norminal Length L / mm

120

(125)

130

140

150

160

(170)

180

(190)

200

220

240

260

最小值	A级
最大值
最小值	B级
最大值
最小值	C级
最大值

119.30	124.20	129.20	139.20	149.20	159.20	169.20	179.20	189.08	199.08	219.08	239.08	-
120.70	125.80	130.80	140.80	150.80	160.80	170.80	180.80	190.93	200.93	220.93	240.93	-
118.25	123.00	128.00	138.00	148.00	158.00	168.00	178.00	187.70	197.70	217.70	237.70	257.40
121.75	127.00	132.00	142.00	152.00	162.00	172.00	182.00	192.30	202.30	222.30	242.30	262.60
118.25	123.00	128.00	138.00	148.00	156.00	166.00	176.00	185.40	195.40	215.40	235.40	254.80
121.75	127.00	132.00	142.00	152.00	164.00	174.00	184.00	194.60	204.60	224.60	244.60	265.20

公称长度 L / mm
Norminal Length L / mm

280

300

320

340

360

380

400

420

440

460

480

500

最小值	A级
最大值
最小值	B级
最大值
最小值	C级
最大值

-	-	-	-	-	-	-	-	-	-	-	-
-	-	-	-	-	-	-	-	-	-	-	-
277.40	297.40	317.15	337.15	357.15	377.15	397.15	416.85	436.85	456.85	476.85	496.85
282.60	302.60	322.85	342.85	362.85	382.85	402.85	423.15	443.15	463.15	483.15	503.15
274.80	294.80	314.30	334.30	354.30	374.30	394.30	413.70	433.70	453.70	473.70	493.70
285.20	305.20	325.70	345.70	365.70	385.70	405.70	426.30	446.30	466.30	486.30	506.30

尽量不采用括号内的公称长度。长度公差按 ISO 4759-1 计算。

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GB /T 192 - 2003

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GB /T 7307 - 2001

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GB /T 7306.1 - 2000

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GB /T 7306.2 - 2000

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GB /T 1181 - 1998

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GB /T 3 - 1997

Run-outs, undercuts and chamfers for general purpose metric screw threads (ISO 3508:1976 / ISO 4755:1983)

GB 1167 - 1996

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GB 7306 - 1987

Pipe threads where pressure-tight joints are made on the threads

GB /T 6559 - 1986

Screws thread shanks for thread forming screw-Metric coarse thread series

GB /T 922 - 1986

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IFI 502 - 1982

Metric triangle lock with thread end

IFI 502 - 1982

Metric Self-tapping Thread End

DIN 3858 - 2005

Whitworth pipe threads for pipe unions

DIN 7505 - 1986

Plastic threads

DIN 7970 - 1984

Threads and thread ends for tapping screws

DIN 103 - 1 - 1977

ISO - Metric Trapezoidal Screw Threads

DIN 7998 - 1975

Thread and thread ends for wood screws

DIN 2510-2 - 1971

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ISO 261 - 1998

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ISO 262 - 1998

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ISO 965-2 - 1998

Limits of sizes for general purpose external and internal screw threads

ISO 965-3 - 1998

Deviations for constructional screw threads

ISO 724 - 1993

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JIS B 1125 (1) - 2003

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JIS B 0209 - 1997

Limits of sizes and tolerances for metric coarse screw threads

JIS B 1125 (1) - 1995

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JB /T 10971 - 2010

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ASME/ANSI B 18.6.3 (T47) - 2013

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ASME/ANSI B 18.6.3 - 2010

AB self-tapping teeth

ASME/ANSI B 18.6.3 - 2010

self-tapping teeth-B

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Self-tapping teeth-BF

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Triangle lock self-tapping teeth--D、F、G

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ASME/ANSI B 18.6.1 - 1997

Wood thread

ASME/ANSI B 18.6.1 - 1981

Wood thread

ASME/ANSI B 18.6.1 - 1981 (R2016)

Thread and body dimeters for wood screws

EN 60423 - 2007

UNI 9702 - 1990

YJT 1025 - 2012

US triangle lock thread-S type

YJT 1026 - 2012

Metric triangle lock thread-S type

YJT 1027 - 2012

Metric triangle lock thread-C type

YJT 1028 - 2012

Metric triangle lock thread-B type

YJT 1029 - 2012

Metric triangle lock thread-P type

BS 4174 - 1972

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BS 4174 - 1972

Thread and point details for Type A threads [TABLE 23]

SAE AS 8879 - 2001

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QC /T 713 - 2004

Tapping thread for nylon lock

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ASME B 18.6.3 (T4.1.1.1-1) - 2024

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ASME B 18.6.3 (T4.1.1.2-1) - 2024

Dimensions of Threads and Points for Type B and BP Thread-Forming Tapping Screws

ASME B 18.6.3 (T4.1.1.4-1) - 2024

Dimensions of Threads and Points for Type A Thread-Forming Tapping Screws

ASME B 18.6.4 (AB) - 1998

Type AB, Thread Forming Tapping Screws [Table 5]

ASME B 18.6.4 (B/BP) - 1998

Type B and BP, Thread Forming Tapping Screws [Table 6]

ASME B 18.6.4 (A) - 1998

Type A, Thread Forming Tapping Screws [Table E1]

ASME B 18.6.4 (C) - 1998

Typ C, Thread Forming Tapping Screws [Table V1]