ISO Metric Gauges are the most commonly used Gauges in the Industry.
ISO standard
Basic dimensions: ISO 724 - 1993(E) & ISO 965/1 - 1998(E)
Gauging practice: ISO-1502 - 1996
DIN standard
Basic dimensions & gauging practice: DIN 13
JIS standard
Basic dimensions: JIS B 0205 & JIS B 0209
Gauging practice: JIS B 0251-1998
ANSI & BS standards use unilateral tolerances for gauges. These gauges are manufactured only against specific customer orders and require minimum order quantity.
ANSI standard
Basic dimensions: ANSI/ASME B 1.13 M
Gauging practice: ANSI/ASME B 1.16 M 1984
For inquiries please specify:
diameter and pitch of the thread
thread type (right or left-handed)
gauge type (plug or ring)
tolerance class
Recommended tolerance classes for internal threads (thread plugs)
FineMedium Coarse
Tolerance position 'G'
Tolerance position 'H'
S
N
L
S
N
L
-
-
-
4H
5H
6H
(5G)
6G
(7G)
5H
6H
7H
-
(7G)
(8G)
-
7H
8H
Recommended tolerance classes for external threads (thread rings)
Tolerance position 'e'
Tolerance position 'f'
Tolerance position 'g'
Tolerance position 'h'
Fine Medium Coarse
S
N
L
S
N
L
S
N
L
S
N
L
-
-
-
-
-
-
-
(4g)
(5g4g)
(3h4h)
4h
(5h4h)
-
6e
(7e6e)
-
6f
-
(5g6g)
6g
(7g6g)
(5h6h)
6h
(7h6h)
-
(8e)
(9e8e)
-
-
-
-
8g
(9g8g)
-
-
-
ISO standard : Basic Dimensions : ISO 965 Part 1,2,3 - 1998,Gauging Practice: ISO 1502-1996.
Indian standard : Basic Dimensions: IS 14962 Part 1,2,3 - 2001,Gauging Practice: IS 2334 - 2001.