Technical Information

THREAD DATA CHARTS

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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

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Gage Crib Worldwide, Inc.
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