螺纹 - 概述

Screw threads General plan

ICS 21.040.01

Supersedes January 1988 edition.

Gewinde – Übersicht

In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker.

Foreword

This standard has been prepared by Technical Committee Gewinde of the Normenausschuss Technische Grundlagen (Fundamentals in Technology Standards Committee).

Amendments

This standard differs from the January 1988 edition as follows:

a) Table 1 has been amended taking into account the specifications of DIN 13-52, DIN 8141-1, DIN EN 144-1, and DIN ISO 6698.

b) Table 1 now also includes DIN 55525 buttress threads; DIN 4930 taper knuckle threads and DIN 4941 tapered drill pipe threads have been dropped.

c) Table 2 has been extended to include ISO metric screw threads complying with ISO 965-4 and ISO 965-5.

Previous editions

DIN 202: 1923-02, 1924, 1926-04, 1938x-07, 1974-08, 1981-12, 1988-01.

1 Scope

This standard gives an overview of screw threads used either for general purposes or in special applications, threads complying with DIN Standards being given in table 1 and those complying with ISO Standards in table 2.

2 Normative references

This standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies.

See tables 1 and 2.

3 Designation

The thread designation is generally to comprise the symbol denoting the type of thread and the value of the nominal diameter or nominal size, followed, where required, by the value of the pitch or number of threads, tolerance, number of starts, taper and whether the thread is a left-hand thread. In the case of a number of screw threads conforming to DIN Standards, the designation is preceded by the DIN number.

It should be noted that, when using tables 1 and 2, only the latest edition of each standard referred to shall apply.

Continued on pages 2 to 8.

Translation by DIN-Sprachendienst.

In case of doubt, the German-language original should be consulted as the authoritative text.

1

Table 1: DIN screw threads

Type of thread	Profile (diagram)	Symbol	Designation1) (example)	Range of nominal sizes	As specified in	Application
ISO metric screw thread (single-start or multi-start)		M	M 0,8	0,3 mm to 0,9 mm	DIN 14-1 to DIN 14-4	Watches and precision engineering
M 82)			1 mm to 68 mm	DIN 13-1	General purpose screw threads (coarse pitch)
M 24 × 4 P 2				DIN 13-52
M 6 × 0,752) M 8 × 1 – LH2)			1 mm to 1 000 mm	DIN 13-2 to DIN 13-11	To be used where pitch of coarse thread is too large.
M 24 × 4 P 2				DIN 13-52
M 64 × 4			64 mm and 76 mm	DIN 6630	External barrel threads
M 30 × 2 – 4H5H			1,4 mm to 355 mm	LN 9163-1 to LN 9163-7 LN 9163-10 and LN 9163-11	Aerospace
ISO metric screw thread with transition tolerance			M 10 Sn 4 M 10 Sk 6	3 mm to 150 mm	DIN 13-51	For stud ends	Non-sealing
M 10 Sn 4 sealing			3 mm to 150 mm	Sealing
Metric screw thread with large clearance			M 36	12 mm to 180 mm	DIN 2510-2	Bolted connections involving bolts with waisted shank
ISO metric screw thread (helical coil thread for inserts)	EG M	EG M 20	2 mm to 52 mm	DIN 8140-2	Helical coil threads (coarse and fine pitch) for wire thread inserts
ISO metric screw thread for interference fits	MFS	MFS 12 × 1,5	5 mm to 16 mm	DIN 8141-1	For interference fits in aluminium cast alloys (coarse and fine pitch)
Metric tapered external screw thread		M	M 30 × 3 keg	6 mm to 60 mm	DIN 158-1	Screw plugs and lubricating nipples
M 30 × 2 keg (short)
Tapping taper external screw thread		S	S 8 × 1	6 mm to 10 mm	DIN 71412	Taper lubricating nipples

1) The complete designations are given in the relevant standards.

2) Designation to be found in DIN ISO 965-1.

(continued)

2

Table 1 (continued)

Type of thread	Profile (diagram)	Symbol	Designation1) (example)	Range of nominal sizes	As specified in	Application
MJ thread		MJ	MJ 6 × 1 – 4h6h	1,6 mm to 39 mm	DIN ISO 5855-1 and DIN ISO 5855-2	Aerospace
			MJ 6 × 1 – 4H5H
Parallel pipe thread where pressure-tight joints are not made on the threads		G	G 1 1/2 A G 1 1/2 B	1/16 to 6	DIN ISO 228-1	External screw threads for pipes, pipe joint assemblies and valves
			G 1 1/2			Internal screw threads for pipes, pipe joint assemblies and valves
			G 3/4	3/4, 1, 2	DIN 6630	External barrel threads
		–	5 1/2	5 1/2	DIN 6602	External screw threads for tank waggons
Parallel pipe thread where pressure-tight joints are made on the threads		Rp	Rp 1/2	1/16 to 6	DIN 2999-1	Internal screw threads for threaded pipes and fittings
			Rp 1/8	1/8 to 1 1/2	DIN 3858	Internal screw threads for compression couplings
Tapered pipe thread where pressure-tight joints are made on the threads		R	Rp 1/2	1/16 to 6	DIN 2999-1	External screw threads for threaded pipes and fittings
			R 1/8-1	1/8 to 1 1/2	DIN 3858	External screw threads for compression couplings
ISO metric (single-start or multi-start) trapezoidal screw thread		Tr	Tr 40 × 7	8 mm to 300 mm	DIN 103-1 to DIN 103-8	General purpose screw threads
			Tr 40 × 14 P 7
Flat metric (single-start or multi-start) trapezoidal screw thread			Tr 40 × 7		DIN 380-1 and DIN 380-2
			Tr 40 × 14 P 7
Trapezoidal (single-start or multi-start) screw thread with clearance			Tr 48 × 12	48 mm	DIN 263-1 and DIN 263-2	Rail vehicles
			Tr 40 × 16 P 8	40 mm
			Tr 32 × 1,5	10 mm to 56 mm	DIN 6341-2	Drawback collets
Rounded trapezoidal screw thread			Tr 40 × 5	26 mm to 80 mm	DIN 30295-1 and DIN 30295-2	Rail vehicles
1) The complete designations are given in the relevant standards.
(continued)

3

Table 1 (continued)

Type of thread	Profile (diagram)	Symbol	Designation1) (example)	Range of nominal sizes	As specified in	Application
Trapezoidal screw thread		KT	KT 22	10 mm to 50 mm	DIN 6063-2	Plastic containers
Metric (single-start or multi-start) buttress thread		S	S 48 × 8	10 mm to 640 mm	DIN 513-1 to DIN 513-3	Used to withstand unilateral loading
	S 40 × 14 P 7
45° buttress thread			S 630 × 20	100 mm to 1 250 mm	DIN 2781	Hydraulic presses
Buttress thread			S 25 × 1,5	6 mm to 40 mm	DIN 2040-1 and DIN 20401-2	Mining
			S 22	10 mm to 50 mm	DIN 55525	Packaging glass and plastic containers
	GS	GS 22
	KS	KS 22
			KS 22	10 mm to 50 mm	DIN 6063-1	Packaging plastic containers
Parallel (single-start or multi-start) knuckle thread		Rd	Rd 40 × 1/6 Rd 40 × 1/3 P 1/6	8 mm to 200 mm	DIN 405-1 and DIN 405-2	General purpose screw threads
Parallel knuckle thread			Rd 40 × 5	10 mm to 300 mm	DIN 20400	Mining
	Rd 80 × 10		50 mm to 320 mm	DIN 15403	Lifting hooks
	Rd 70		20 mm to 100 mm	DIN 7273-1	Steel sheet components and associated couplings
1) The complete designations are given in the relevant standards.
(continued)

4

Table 1 (continued)

Type of thread	Profile (diagram)	Symbol	Designation1) (example)	Range of nominal sizes	As specified in	Application
Parallel knuckle thread with clearance		Rd	Rd 59 × 7	34 mm to 79 mm	DIN 262-1 and DIN 262-2	Rail vehicles
			Rd 59 × 7, left-hand
Parallel knuckle thread with clearance			Rd 50 × 7	50 mm	DIN 264-1 and DIN 264-2	Rail vehicles
			Rd 50 × 7, left-hand
Parallel knuckle thread			Rd 40 × 1/7	40 mm, 80 mm and 110 mm	DIN 3182-1	Respiratory equipment
		GL	GL 25 × 3	8 mm to 45 mm	DIN 168-1	Glass containers
Edison thread		E	E 27	14 mm 16 mm 18 mm 27 mm 33 mm	DIN 40400	D-type fuses; E 14 and E 27 screw threads also for lamp caps and holders
			E 5	5 mm	DIN EN 60061-1	Lamp caps
			E 10	10 mm
			E 40	40 mm
		—	28 × 2	28 mm and 40 mm	DIN EN 60399	External screw threads for lamp holders and internal screw threads for lamp shade carrier rings
Parallel Whitworth thread		W	W 3/16	3/16	DIN 49301	Electrical engineering: screw-in gauge rings D II and D III
Glass screw thread		Glasg	Glasg 74,5	74,5 mm 84,5 mm 99 mm 123,5 mm 158 mm 188 mm	DIN 40450	Electrical engineering: cover glasses and caps
1) The complete designations are given in the relevant standards.
(continued)

5

Table 1 (concluded)

Type of thread	Profile (diagram)	Symbol	Designation1) (example)	Range of nominal sizes	As specified in	Application
Steel conduit screw thread		Pg	Pg 21	7 mm to 48 mm	DIN 40430	Electrical engineering
Tapping screw thread		ST	ST 3,5	1,5 mm to 9,5 mm	DIN EN ISO 1478	Tapping screws
Wood screw thread		—	4	1,6 mm to 20 mm	DIN 7998	Wood screws
Cycle thread		FG	FG 9,5	2 mm to 34,8 mm	DIN 79012	Bicycles and motor-bicycles
		—	1,375 – 24 6H/6g	1,375	DIN ISO 6698	Used to assemble free wheels on bicycle hubs
Valve screw thread		Vg	Vg 12	5 mm to 12 mm	DIN 7756	Tyre valves
Taper Whitworth thread		E	E 17 con	19,8 mm	DIN EN 144-1	Screwed sockets of gas cylinder valves
		W	W 28,8 × 1/14 keg	19,8 mm 28,8 mm 31,3 mm	DIN 477-1
Parallel Whitworth thread			W 21,8 × 1/14	21,8 mm 24,32 mm 24,4 mm		Connections of gas cylinder valves
			W 80	80 mm	DIN EN 962	Protective caps for gas cylinder valves
RMS thread		RMS	RMS	20,32 mm	DIN 58888	Microscope objectives
Tapered drill pipe thread		Gg	Gg 4 1/2	3 1/2 4 1/2 5 1/2	DIN 20314	Deep drilling and mining
Screw thread for bone screws and nuts		HA	HA 4,5	1,5 mm 2 mm 2,7 mm 3,5 mm and 4,5 mm	DIN 58810	Bone screws and nuts for surgical implants
		HB	HB 4,5	4 mm and 6,5 mm

1) The complete designations are given in the relevant standards.

6