THREAD
DATA CHART:
ELECTRICAL THREAD -- BRITISH ET (Conduit to BS 31)
Imperial
Conduit (ET) to BS 31
Thread
Nominal
Major
Threads
Designation
Size
Diameter
per
mm
inch
ET
ET
d=D
tpi
ET 5/8
5/8
15.88
18
ET 3/4
3/4
19.05
16
ET 1
1
25.40
16
ET 1 1/4
1 1/4
31.75
16
ET 1 1/2
1 1/2
38.10
14
ET 2
2
50.80
14
ET 2 1/2
2 1/2
63.50
14
ET 3
3
76.20
14
Disclaimer
This data is provided for general information only. The intention is to provide accurate information; regardless; errors may exist in the supplied information. If accuracy is critical, base your final decisions on the data provided in the root document: BS 31; which is a copyrighted document. To purchase a copy visit an Authorized Reseller.
Comments:
Original Posting: 2/28/2008
Last Revision: 2/12/2013
Error corrections in, or comments about, the above data can be sent to: office@gagecrib.com
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