ISO/TR 11364:2019

Gas cylinders — Compilation of national and international valve stem/gas cylinder neck threads and their identification and marking system

This document lists the different valve stem to gas cylinder connection threads currently and historically existing worldwide and provides official coded designations for them. These coded designations will then be available for identification and marking purposes. It also gives guidance concerning which threads are dimensionally identical and which are interchangeable. Furthermore, this document provides guidance for valving procedures when fitting valves to gas cylinders.

Bouteilles à gaz — Compilation des filetages nationaux et internationaux des queues de robinets/goulots de bouteilles et leurs systèmes d'identification et de marquage

General Information

• Status: Published
• Publication Date: 27-May-2019
• ICS: 23.020.30 - Pressure vessels, gas cylinders
• ICS: 23.020.35 - Gas cylinders
• Technical Committee: ISO/TC 58 - Gas cylinders
• Drafting Committee: ISO/TC 58/WG 10 - Fitting of valves to gas cylinders
• Current Stage: 6060 - International Standard published
• Completion Date: 28-May-2019

Relations

• Revises: ISO/TR 11364:2012 - Gas cylinders — Compilation of national and international valve stem/gas cylinder neck threads and their identification and marking system
• Effective Date: 13-Feb-2016

Standards Content (Sample)

TECHNICAL ISO/TR
REPORT 11364
Second edition
2019-05
Gas cylinders — Compilation of
national and international valve stem/
gas cylinder neck threads and their
identification and marking system
Bouteilles à gaz — Compilation des filetages nationaux et
internationaux des queues de robinets/goulots de
bouteilles et leurs systèmes d'identification et de marquage
Reference number
ISO/TR 11364:2019(E)
©
ISO 2019

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ISO/TR 11364:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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Phone: [phone]
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Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

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ISO/TR 11364:2019(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Interchangeability of valve/cylinder threads . 1
5 List of threads . 2
5.1 General . 2
5.2 List of threads . 2
5.3 Tables of threads listed by country .12
Bibliography .32
© ISO 2019 – All rights reserved iii

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ISO/TR 11364:2019(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see: www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 58, Gas cylinders.
This second edition cancels and replaces the first edition (ISO/TR 11364:2012), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— Tables 1 to 17 have been corrected;
— Tables for Denmark threads, Indian threads and USA threads have been introduced.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved

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ISO/TR 11364:2019(E)

Introduction
There is a huge variety of valve to gas cylinder neck thread connections worldwide and cylinders are
free to be equipped with any thread according to a recognized thread standard. ISO standards for
cylinders and valves require the marking of an identification of the thread on valve and cylinder but
there is presently no harmonized marking system.
The purpose of this document is to list all known cylinder/valve threads currently used and also
threads used in the past and to specify a harmonized identification code and marking system for both
cylinders and valves. The aim is to reduce the risk of mismatches when valves are fitted to gas cylinders
and avoid related safety incidents.
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TECHNICAL REPORT ISO/TR 11364:2019(E)
Gas cylinders — Compilation of national and international
valve stem/gas cylinder neck threads and their
identification and marking system
1 Scope
This document lists the different valve stem to gas cylinder connection threads currently and
historically existing worldwide and provides official coded designations for them. These coded
designations will then be available for identification and marking purposes.
It also gives guidance concerning which threads are dimensionally identical and which are
interchangeable.
Furthermore, this document provides guidance for valving procedures when fitting valves to gas
cylinders.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Interchangeability of valve/cylinder threads
Threads of recognized standards which are dimensionally identical but have historically been named
differently are fully interchangeable.
Experience has shown that the following combination of threads can be safely used in service: 25E
valve with T8, T23 and T26 cylinder threads. However, for small steel (less than 5 l water capacity) and
aluminium alloy cylinders, users should examine the suitability of the resulting combination for each
application in order for them to be interchangeable.

© ISO 2019 – All rights reserved 1

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ISO/TR 11364:2019(E)

5 List of threads
5.1 General
The lists of taper and parallel threads are given in Table 1. The columns in the tables have the following
meaning:
Column 1 — Ref. No.
Reference number of the thread starting with a “T” for taper threads and “P” for parallel threads;
followed by a consecutive number in the order as they are listed.
Column 2 — Origin
Country or region of origin of the thread.
Column 3 — Nominal designation of thread
Nominal dimensional identification or designation of the thread given in its originating standard or
specification.
Column 4 — Specification or standard
Specification or standard from which the thread originated and last version (see also the bibliography).
Column 5 — Identification and marking
This column indicates an identification code for the relevant thread assigned under this document
which will in future be used for marking purposes.
NOTE This simplified marking code covers for parallel threads the thread size only and not the geometry of
the sealing area or surface.
Column 6 — Note
This column indicates specific equivalency or interchangeability with other threads listed.
Column 7 — Recommended valving procedure
This column indicates the recommendations for fitting valves to gas cylinders, in particular the
recommended torque values to be used, which normally follow the requirements of ISO 13341.
5.2 List of threads
See Table 1.
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ISO/TR 11364:2019(E)

© ISO 2019 – All rights reserved 3
Table 1 — List of national and international valve/gas cylinder threads
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
T1, T2, T3, T39, T57, T58, T60 and T64
T1 International 17E ISO 11363-1 17E See ISO 13341
are fully interchangeable threads
T1, T2, T3, T39, T57, T58, T60 and T64
T2 EU E17 con EN 144-1 17E
are fully interchangeable threads
W19,8 × 1/14 keg T1, T2, T3, T39, T57, T58, T60 and T64
T3 Germany DIN 477-1 —
6°52′ (3:25) taper are fully interchangeable threads
T4, T5, T6, T38, T59 and T61 are fully
interchangeable threads
T4 International 25E ISO 11363-1 25E See ISO 13341
While the 25E and V2 threads are sim-
ilar, they are not identical, and should
not be used interchangeably
T4, T5, T6, T38, T59 and T61 are fully
T5 Germany W28,8 × 1/14 keg DIN 477-1 —
interchangeable threads
W1,000” × 1,814 mm T4, T5, T6, T38, T59 and T61 are fully
T6 UK BS 341-1:1991 25T
3:25 incl. taper interchangeable threads
Special taper stem thread,
1,0 inch Nominal, 14 threads T7, T8 and T8a are fully interchangea-
T7 Australia AS2473.2-2015 25AU AS 2337.1-2004
per inch, 1 in 8 taper on ble threads
diameter
ISO 13341 may be
1 inch Nominal. 14 threads
Cylinders with this thread can accept used for guidance
T8 UK per inch. 1 in 8 taper on BS 341-1:1962 1 inch
valves with T4, T5, T6, T7 and T38 (torque values as
diameter
for 25E)
T7, T8 andT8a are fully interchangea-
T8a India Type 4, size 2 IS 3224 25AU
ble threads
W31,3 × 1/14 keg T9, T10, T11, T12, T62 and T63 are fully ISO 13341 may be
T9 Germany DIN 477-1 28E
6°52′ (3:25) taper interchangeable threads used for guidance
W31,3 × 1/14” T9, T10 T11, T12, T62 and T63 are fully
T10 Denmark DS 729 28E
(3:25) taper interchangeable threads
T9, T10 T11, T12, T62 and T63 are fully
T11 Italy W28,3 × 1/14” UNI 11144 —
interchangeable threads
28,3 × 1/14” T9, T10, T11, T12, T62 and T63 are fully
T12 France NF E 29-676 28E
taper angle 6°52′ interchangeable threads

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ISO/TR 11364:2019(E)

4 © ISO 2019 – All rights reserved
Table 1 (continued)
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
ISO 13341 may be
W0,6” × 14 threads per inch T13 and T14 are fully interchangeable used for guidance
T13 UK BS 341-2:1963 15T
1:5,625 taper threads (torque values as
for 17E)
T13 and T14 are fully interchangeable
T14 Australia 06-15AU (1/14”) AS 2473.2-2015 15AU AS 2337.1-2015
threads
ISO 13341 may be
W0,635” × 1,411 mm used for guidance
T15 UK BS 341-1:1962 16T
8° incl. taper (torque values as
for 17E)
UKLPG Industry
Information Sheet
SI 0,694” × 1,814 mm 36 — Cylinder
T16 UK 17T For propane
6° incl. taper Valve — 17T
Thread Require-
ments
ISO 13341 may be
W0,715” × 1,814 mm T17, T18 and T19 are fully interchange- used for guidance
T17 UK Ireland BS 341-1:1991 18T
1:8 incl. taper able threads (torque values as
for 17E)
Special taper stem thread,
0,715 inch nominal, 14 T17, T18 and T19 are fully interchange-
T18 Australia AS 2473.2-2015 18AU AS 2337.1-2004
threads per inch, 1 in 8 taper able threads
on diameter
T17, T18 and T19 are fully interchange-
T19 India Type 4 size 1 IS 3224 18AU
able threads
ISO 13341 may be
W0,735” × 1,814 mm used for guidance
T20 UK BS 341-1:1991 19T
1:8 incl. taper (torque values as
for 17E)
ISO 13341 may be
W1,025” × 1,814 mm used for guidance
T21 UK BS 341-1:1991 26T
10 degrees incl. taper angle (torque values as
for 25E)
W1,250” × 2,309 mm T22 and T22a are fully interchangea- ISO 13341 may be
T22 UK BS 341-1:1991 32T
1:8 incl. taper ble threads used for guidance

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ISO/TR 11364:2019(E)

© ISO 2019 – All rights reserved 5
Table 1 (continued)
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
T22 and T22a are fully interchangea-
T22a India Type 4 size 3 IS 3224 32T
ble threads
ISO 13341 may be
Cylinders with this thread can accept used for guidance
T23 Sweden W28, taper 3:24,5 SMS2235: 1968 25S
valves with T4, T5, T6 and T38 (torque values as
for 25E)
Has been
changed in P54
T24 but the following —
T numbers have
not yet changed
16,4 × 1/14”
T25 France NF E 29-678 16F
taper angle 8°40′
ISO 13341 may be
25,8 × 1/14” Cylinders with this thread can accept used for guidance
T26 France NF E 29 680 25F
taper angle 6°38′ valves with T4, T5, T6, T38, T59 and T61 (torque values as
for 25E)
34 × 2 mm T27 and T28 are fully interchangeable
T27 France NF E 29-682 34F
taper angle 5° threads
T27 and T28 are fully interchangeable
T28 Italy M34 × 2 UNI 11144 34F
threads
26 × 1/14” Thread similar to T42 (3/4” NGT) but
T29 France NF E 29-684:2015 26F3
taper angle 3°34′ (1:16) not equivalent
RC1H” 11TPI
T30 France NF E 03-004 — Not used
taper 3°34′ (1:16)
W39-12TPI, taper 3:26,
T31 Japan JIS B 8244 39J For acetylene
profile-to-surface
W20-14TPI, taper 3:26,
T32 Japan JIS B 8245 V1 JV1A For LPG
profile-to-axis
W20-14TPI taper 3:26,
T33 Japan JIS B 8246 V1 V1
profile-to-surface
W28-14TPI taper 3:26,
T34 Japan JIS B 8245 V2 JV2A For LPG
profile-to-axis

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ISO/TR 11364:2019(E)

6 © ISO 2019 – All rights reserved
Table 1 (continued)
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
While the 25E and V2 threads are sim-
W28-14TPI taper 3:26,
T35 Japan JIS B 8246 V2 V2 ilar, they are not identical, and should
profile-to-surface
not be used interchangeably
W28-14TPI taper 3:26,
T36 Japan JIS B 8246 V3 V3 Short length
profile-to-surface
W39-12TPI taper 3:25,
T37 China GB 8335-1998 39C
profile-to-surface
W27,8-14TPI taper 3:25, T4, T5, T6, T38, T59 and T61 are fully
T38 China GB 8335-1998 25E See ISO 13341
profile-to-surface interchangeable threads
W19,2-14TPI taper 3:25, T1, T2, T3, T39, T57, T58, T60 and T64
T39 China GB 8335-1998 17E See ISO 13341
profile-to-surface are fully interchangeable threads
T40 USA 3/8—18NGT ANSI/CGA V-1 06N See CGA V-1
T41 USA 1/2—14NGT ANSI/CGA V-1 08N See CGA V-1
T42 USA 3/4—14NGT ANSI/CGA V-1 12N See CGA V-1
T43 USA 1-11 1/2-NGT ANSI/CGA V-1 16N See CGA V-1
T44 USA 1-1/4-11 1/2-NGT ANSI/CGA V-1 20N See CGA V-1
T44a USA 1-1/2-11 1/2-NGT ANSI/CGA V-1 24N See CGA V-1
T45 USA 3/4-14SGT ANSI/CGA V-1 12S See CGA V-1
T46 France Ø19,3 × 1,814 10, 5 % ± 0,5 % 19F(P) For LPG
Ø23,2 or 23,7 × 2,00,
T47 France 23F(P) For LPG
10 % ± 0,5 %
T48 France Ø28,8 × 1,814 11, 2 % ± 0,5 % 29F(P) For LPG
T49 Korea W20-14 taper 3/26 KS B 6212 V1 —
T50 Korea W28-14 taper 3/26 KS B 6212 V2 —
T51 Korea W28-14 taper 3/26 KS B 6212 V1 —
T52 Korea W28-14 taper 3/26 KS B 6212 V2 —
T53 Korea W28-14 taper 3/26 KS B 6212 V3 —
T54 Korea W39-12 taper 3/26 KS B 6215 — For acetylene only
T55 Korea W38-12 taper 3/26 KS B 6219 N3-S — Profile perpendicular to surface
T56 Korea W38-12 taper 3/26 KS B 6219 N3-A — Profile perpendicular to axis

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ISO/TR 11364:2019(E)

© ISO 2019 – All rights reserved 7
Table 1 (continued)
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
Breathing apparatus
T57 Austria E17 con (W19,8) EN 144-1:1992 17E
T1, T2, T3, T39, T57, T58, T60 and T64
are fully interchangeable threads
Breathing apparatus
T58 Austria E17 con (W19,8) EN 144-1:2005 17E
T1, T2, T3, T39, T57, T58, T60 and T64
are fully interchangeable threads
T4, T5, T6, T38, T59 and T61 are fully
T59 Austria 25E (W28,8) EN 629-1:1996 25E
interchangeable threads
ÖNORM M 7390- T1, T2, T3, T39, T57, T58, T60 and T64
T60 Austria W19,8 × 1/14 keg 17E
2:1985 are fully interchangeable threads
ÖNORM M 7390- T4, T5, T6, T38, T59 and T61 are fully
T61 Austria W28,8 × 1/14 keg 25E
2:1985 interchangeable threads
Acetylene only
ÖNORM M 7390-
T62 Austria W31,3 × 1/14 keg 28E
T9, T11, T12, T62 and T63 are fully
2:1985
interchangeable threads
Acetylene only
W31,3 × 1/14 keg ÖNORM M 7390-
T63 Austria 28E
T9, T11, T12, T62 and T63 are fully
(28E) 7:2009
interchangeable threads
T1, T2, T3, T39, T57, T58, T60 and T64
T64 Austria 17E (W19,8) ISO 11116-1:1999 17E
are fully interchangeable threads
P1, P2, P42, P45, P47, P49 and P52 have
P1 International M18 × 1,5 ISO 15245-1:2001 18P See ISO 13341
fully interchangeable thread size
P1, P2, P42, P45, P47, P49 and P52 have
P2 EU M18 × 1,5 EN 144-1:2005 M18
fully interchangeable thread size
P3, P4, P5, P43, P46, P48, P50 and P53
P3 International M25 × 2 ISO 15245-1:2001 25P See ISO 13341
have fully interchangeable thread size
P3, P4, P5, P43, P46, P48, P50 and P53
P4 EU M25 × 2 EN 144-1:2005 M25
have fully interchangeable thread size
P3, P4, P5, P43, P46, P48, P50 and P53
P5 Germany M25 × 2 DIN 477-6 M25
have fully interchangeable thread size
P6, P44 and P51 have fully interchange-
P6 International M30 × 2 ISO 15245-1:2001 30P See ISO 13341
able thread size

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8 © ISO 2019 – All rights reserved
Table 1 (continued)
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
JIS B8246
(JIS B0208, P7 and P8 have fully interchangeable
P7 Japan 1/2–20UNF U8
ISO 263, thread size
ANSI B1.1)
P7 and P8 have fully interchangeable
P8 USA 1/2–20UNF ANSI/ASME B1.1 U8
thread size
JIS B8246
(JIS B0208, P9, P10 and P11 have fully interchange-
P9 Japan 5/8–18UNF U10
ISO 263, able thread size
ANSI B1.1)
P9, P10 and P11 have fully interchange-
P10 USA 5/8–18UNF ANSI/ASME B1.1 U10
able thread size
P9, P10 and P11 have fully interchange-
P11 UK 5/8–18UNF BS 1580:1962 —
able thread size
JIS B8246
(JIS B0208, P12, P13 and P14 have fully inter-
P12 Japan 3/4–16UNF UNF12
ISO 263, changeable thread size
ANSI B1.1)
P12, P13 and P14 have fully inter-
P13 UK 3/4–16UNF BS 1580:1962 —
changeable thread size
P12, P13 and P14 have fully inter-
P14 USA 3/4–16UNF ANSI/ASME B1.1 U12
changeable thread size
JIS B8246
(JIS B0208, P15 and P16 have fully interchangeable
P15 Japan 7/8–14UNF UNF14
ISO 263, thread size
ANSI B1.1)
P15 and P16 have fully interchangeable
P16 USA 7/8–14UNF ANSI/ASME B1.1 0
thread size
JIS B8246
(JIS B0208, P17 and P18 have fully interchangeable
P17 Japan 1 1/8–12UNF UNF18
ISO 263, thread size
ANSI B1.1)
P17 and P18 have fully interchangeable
P18 USA 1 1/8–12UNF ANSI/ASME B1.1 0
thread size

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© ISO 2019 – All rights reserved 9
Table 1 (continued)
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
JIS B8246 P19 and P20 have fully interchangeable
P19 Japan 3/4–14NPSM SP12
(ANSI B1.20.1) thread size
ANSI/ASME P19 and P20 have fully interchangeable
P20 USA 3/4–14NPSM SP12
B1.20.1 thread size
P21 UK 1/4” BSP BS 2779:1986 BSP04
P22 UK M14 × 1,5 ISO BS 3643:1981 M14
P23 UK 1 7/8”−12 UNS 2B BS 1580:1962 UNS30
P24 UK 1 5/8”−12UNS BS 1580:1962 UNS26
P25 USA 2−12UN−2B ANSI/ASME B1.1 UN32
P26 USA 3−12UN-2B ANSI/ASME B1.1 UN48
P27 USA 3 1/2"−12UN-2B ANSI/ASME B1.1 UN56
Special ISO 228 (external
P28 G3/4” G¾
Application or internal)
Special ISO 228 (external
P29 G1” G1
Application or internal)
Special ISO 228 (external
P30 G1 1/4” G20
Application or internal)
Special ISO 228 (external
P31 G1 1/2” G24
Application or internal)
Special ISO 228 (external
P32 G2” G32
Application or internal)
Special
P33 1 5/8”−12UNJ-3B ISO 3161 UNJ26
Application
Special
P34 2 1/2−12UN-2A (or 2B) ANSI/ASME B1.1 UN40
Application
Special
P35 M50 × 2 ext. DIN 13 M50 Thread size fully interchangeable to P39
Application
Special
P36 3 1/4” × 8UN−2B BS 1580 UN52
Application
Special
P37 4 1/2” × 8UN−2B BS 1580 UN72
Application

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10 © ISO 2019 – All rights reserved
Table 1 (continued)
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
Special
P38 6 1/2” × 8UN−2B BS 1580 UN104
Application
Special
P39 M50 × 2 ISO 965 M50 Thread size fully interchangeable to P35
Application
Special
P40 M86 × 3 ISO 965 M86
Application
Special
P41 M68 × 2 ISO 965 M68
Application
P1, P2, P42, P45, P47, P49 and P52 have
P42 UK M18 × 1,5−6H BS 341:1991 18P
fully interchangeable thread size
P3, P4, P5, P43, P46, P48, P50 and P53
P43 UK M25 × 2,0−6H BS 341-1:1991 25P
have fully interchangeable thread size
P6, P44 and P51 have fully interchange-
P44 UK M30 × 2,0−6H BS 341-1:1991 30P
able thread size
Breathing apparatus
P45 Austria M18 × 1,5 EN 144-1:1992 18P
P1, P2, P42, P45, P47, P49 and P52 have
fully interchangeable thread size
Breathing apparatus
P46 Austria M25 × 2 EN 144-1:1992 25P
P3, P4, P5, P43, P46, P48, P50 and P53
have fully interchangeable thread size
Breathing apparatus
P47 Austria M18 × 1,5 EN 144-1:2005 18P
P1, P2, P42, P45, P47, P49 and P52 have
fully interchangeable thread size
Breathing apparatus
P48 Austria M25 × 2 EN 144-1:2005 M25
P3, P4, P5, P43, P46, P48, P50 and P53
have fully interchangeable thread size
P1, P2, P42, P45, P47, P49 and P52 have
P49 Austria M18 × 1,5 ISO 15245-1:2001 18P
fully interchangeable thread size
P3, P4, P5, P43, P46, P48, P50 and P53
P50 Austria M25 × 2 ISO 15245-1:2001 25P
have fully interchangeable thread size
P6, P44 and P51 have fully interchange-
P51 Austria M30 × 2 ISO 15245-1:2001 30P
able thread size

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© ISO 2019 – All rights reserved 11
Table 1 (continued)
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
Breathing apparatus
ÖNORM M 7390-
P52 Austria M18 × 1,5 18P
P1, P2, P42, P45, P47, P49 and P52 have
5:1987
fully interchangeable thread size
Breathing apparatus
ÖNORM M 7390-
P53 Austria M25 × 2 25P
P3, P4, P5, P43, P46, P48, P50 and P53
5:1987
have fully interchangeable thread size
Special parallel stem thread,
P54 Australia AS 2473.2-2015 ¾ NGS AS 2337-1-2004
Nominal thread size 3/4” NGS

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ISO/TR 11364:2019(E)

5.3 Tables of threads listed by country
See Tables 2 to 17
12 © ISO 2019 – All rights reserved

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© ISO 2019 – All rights reserved 13
Table 2 — Australian threads
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
Special taper stem thread,
1,0 inch Nominal, 14 threads T7, T8 and T8a are fully interchangea-
T7 Australia AS 2473.2-2015 25AU AS 2337.1-2004
per inch, 1 in 8 taper on ble threads
diameter
T13 and T14 are fully interchangeable
T14 Australia 06-15AU (1/14) (1:5,625) AS 2473.2-2015 15AU AS 2337.1-2004
threads
Special taper stem thread,
0,715 inch Nominal, 14 T17 , T18 and T19 are fully interchange-
T18 Australia AS 2473.2-2015 18AU AS 2337.1-2004
threads per inch, 1 in 8 taper able threads
on diameter
Has been
changed in P54
T24 but the following —
T numbers have
not yet changed
Special parallel stem thread,
P54 Australia AS 2473.2-2015 ¾ NGS AS 2337-1-2004
Nominal thread size 3/4” NGS

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14 © ISO 2019 – All rights reserved
Table 3 — Austrian threads
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
Breathing apparatus
T57 Austria E17 con (W19,8) EN 144-1:1992 17E
T1, T2, T3, T39, T57, T58, T60 and T64
are fully interchangeable threads
Breathing apparatus
T58 Austria E17 con (W19,8) EN 144-1:2005 17E
T1, T2, T3, T39, T57, T58, T60 and T64
are fully interchangeable threads
T4, T5, T6, T38, T59 and T61 are fully
T59 Austria 25E (W28,8) EN 629-1:1996 25E
interchangeable threads
ÖNORM M 7390- T1, T2, T3, T39, T57, T58, T60 and T64
T60 Austria W19,8 × 1/14 keg. 17E
2:1985 are fully interchangeable threads
ÖNORM M 7390- T4, T5, T6, T38, T59 and T61 are fully
T61 Austria W28,8 × 1/14 keg. 25E
2:1985 interchangeable threads
Acetylene only
ÖNORM M 7390-
T62 Austria W31,3 × 1/14 keg. 28E
T9, T11, T12, T62 and T63 are fully
2:1985
interchangeable threads
Acetylene only
ÖNORM M 7390-
T63 Austria W31,3 × 1/14 keg. (28E) 28E
T9, T11, T12, T62 and T63 are fully
7:2009
interchangeable threads
T1, T2, T3, T39, T57, T58, T60 and T64
T64 Austria 17E (W19,8) ISO 11116-1:1999 17E
are fully interchangeable threads
Breathing apparatus
P45 Austria M18 × 1,5 EN 144-1:1992 18P
P1, P2, P42, P45, P47, P49 and P52 have
fully interchangeable thread size
Breathing apparatus
P46 Austria M25 × 2 EN 144-1:1992 25P
P3, P4, P5, P43, P46, P48, P50 and P53
have fully interchangeable thread size
Breathing apparatus
P47 Austria M18 × 1,5 EN 144-1:2005 18P
P1, P2, P42, P45, P47, P49 and P52 have
fully interchangeable thread size

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© ISO 2019 – All rights reserved 15
Table 3 (continued)
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
Breathing apparatus
P48 Austria M25 × 2 EN 144-1:2005 M25
P3, P4, P5, P43, P46, P48, P50 and P53
have fully interchangeable thread size
P1, P2, P42, P45, P47, P49 and P52 have
P49 Austria M18 × 1,5 ISO 15245-1:2001 18P
fully interchangeable thread size
P3, P4, P5, P43, P46, P48, P50 and P53
P50 Austria M25 × 2 ISO 15245-1:2001 25P
have fully interchangeable thread size
P6, P44 and P51 have fully interchange-
P51 Austria M30 × 2 ISO 15245-1:2001 30P
able thread size
Breathing apparatus
ÖNORM M 7390-
P52 Austria M18 × 1,5 18P
P1, P2, P42, P45, P47, P49 and P52 have
5:1987
fully interchangeable thread size
Breathing apparatus
ÖNORM M 7390-
P53 Austria M25 × 2 25P
P3, P4, P5, P43, P46, P48, P50 and P53
5:1987
have fully interchangeable thread size

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ISO/TR 11364:2019(E)

16 © ISO 2019 – All rights reserved
Table 4 — Chinese threads
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
W39-12TPI taper 3:25,
T37 China GB 8335-1998 39C
profile-to-surface
W27,8-14TPI taper 3:25, T4, T5, T6, T38, T59 and T61 are fully
T38 China GB 8335-1998 25E See ISO 13341
profile-to-surface interchangeable threads
W19,2-14TPI taper 3:25, T1, T2, T3, T39, T57, T58, T60 and T64
T39 China GB 8335-1998 17E See ISO 13341
profile-to-surface are fully interchangeable threads

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ISO/TR 11364:2019(E)

© ISO 2019 – All rights reserved 17
Table 5 — Denmark threads
Nominal designation Specification Identification Recommended
Ref. no. Origin Note
of thread or standard and marking valving procedure
W31,3 × 1/14 T9, T10 T11, T12, T62 and T63 are fully
T10 Denmark DS 729 28E
(3:25) taper interchangeable threads

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ISO/TR 11364:2019(E)

18 © ISO 2019 – All rights reserved
Table 6 — European threads
Nominal design
...