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Technical Information

INDEX of THREAD DATA CHARTS

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: gageguy@gagecrib.com

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Gage Crib Worldwide, Inc.
6701 Old 28th St SE, Suite B
Grand Rapids, MI 49546-6937
Phone: 001-616-954-6581 • Fax: 001-616-954-6583
Email: gageguy@gagecrib.com

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