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。

GB /T 37462 - 2019

Locking threads with 30 degree wedge ramp

GB /T 15054.1 - 2018

Miniature screw threads : Profiles , general plan and basic dimensions

GB /T 197 - 2018

General purpose metric screw threads - Tolerances

GB /T 18685 - 2017

The blank diameters for rolling general purpose metric screw threads

GB /T 12716 - 2011

GB /T 27944 - 2011

Dryseal pipe threads with the thread angle of 60 degrees

GB /T 24425.5 - 2009

Internal thread for wire thread inserts

GB /T 13576.1 - 2008

Buttress Thread with the Flank Angles of 3 and 30 Degrees - Part 1: Profiles

GB /T 1415 - 2008

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

GB /T 15756 - 2008

General purpose metric screw threads - Limits of sizes

GB /T 20670 - 2006

Unified screw threads - General plan

GB /T 5796.1 - 2005

Trapezoidal screw threads - Part 1: Profiles

GB /T 1414 - 2003

General purpose metric screw threads - The plan for pipe systems

GB /T 192 - 2003

General purpose metric screw threads-Basic profile（ISO 68-1:1998, MOD）

GB /T 196 - 2003

General purpose metric screw threads - Basic dimenslons

GB /T 2516 - 2003

General purpose metric screw threads - Limit deviations

GB /T 9144 - 2003

General purpose metric screw threads - Preferable plan

GB /T 9145 - 2003

General purpose metric screw threads - Limits of sizes for the screw threads of medium quality and preferable plan

GB /T 9146 - 2003

General purpose metric screw threads - Limits of sizes for the screw threads of coarse quality and preferable plan

GB /T 5280 - 2002

Tapping screws thread

GB /T 7307 - 2001

Pipe Threads with 55 Degree Thread Angle where Pressure-Tight Joints are not Made on the Threads

GB /T 7306.1 - 2000

Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads一 Parallel internal and taper external threads（eqv ISO 7-1:1994）

GB /T 7306.2 - 2000

Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads一 Taper internal and external threads（eqv ISO 7-1:1994）

GB /T 1181 - 1998

The interference-fit threads

GB /T 3 - 1997

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

GB 1167 - 1996

The threads for transition fit

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

Specification for wood screws

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

Bolted Connections with Reduced Shank; Metric Thread with Large Clearence, Nominal Dimensions and Limits

ISO 3353-1 - 2020

Aerospace - Lead and runout threads - Part 1: Rolled external threads

ISO 2901 - 2016

ISO metric trapezoidal screw threads - Basic and design profiles

ISO 965-1 - 2013

ISO general purpose metric screw threads - Tolerances - Part 1: Principles and basic data

ISO 725 - 2009

ISO inch screw threads─Basic dimensions

ISO 228-1 - 2000

Pipe threads where pressure-tight joints are not made on the threads

ISO 1478 - 1999

Tapping Screws Thread

ISO 261 - 1998

ISO general purpose metric screw threads - General plan

ISO 262 - 1998

ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts

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

ISO general-purpose metric screw threads─Basic dimensions

JIS B 1125 (1) - 2015

Tapping Screw Threads and Ends

JIS B 0251 - 2008

Limit gauges for metric screw threads

JIS B 1125 (1) - 2003

Tapping screw threads and ends

JIS B 0209 - 1997

Limits of sizes and tolerances for metric coarse screw threads

JIS B 1125 (1) - 1995

Tapping Screw Threads and Ends

JB /T 10971 - 2010

Locking Thread with 30° wedge ramp

ASME/ANSI B 18.6.3 (T40) - 2013

Dimensions of Threads and Points for Type AB and Type ABR Thread-forming Screws

ASME/ANSI B 18.6.3 (T41) - 2013

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

ASME/ANSI B 18.6.3 (T42) - 2013

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

ASME/ANSI B 18.6.3 (T46) - 2013

Thread Lengths for Type A, AB, B, BF, BP and BT Tapping Screws

ASME/ANSI B 18.6.3 (T47) - 2013

Thread Lengths for Type C, D, F, G, T and TRS Tapping Screws

ASME/ANSI B 18.2.1 - 2010

Lag screw threads

ASME/ANSI B 18.6.3 - 2010

AB self-tapping teeth

ASME/ANSI B 18.6.3 - 2010

self-tapping teeth-B

ASME/ANSI B 18.6.3 - 2010

Self-tapping teeth-BF

ASME/ANSI B 18.6.3 - 2010

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

ASME/ANSI B 18.6.3 - 2010

ASME/ANSI B 18.31.3 - 2009

Threaded rods(inch series) (A307, F1554, A193, CRES,F593,F468)

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

EN 10226-1 - 2004

Pipe threads where pressure tight joints are made on the threads - Part 1 : Taper external threads and parallel internal threads - Dimensions, tolerances and designation