Strain Reliefs and Accessories
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What does "PG" mean ?
The abbreviation "PG" stands for Stahl Panzerrohr-Gewinde.
The american translation would be "Steel Conduit Thread".
PG-Threads are standardized in Germany per DIN 40430 as shown in the drawing...
	Formula:
			25.4
	P	=	--------------
			Z
	r	=	0.107P
	H	=	0.595875P
	H1	=	0.8H = 0.4767P
	Nominal Dimensions (in millimeters)
	PG	Outside	Pitch	Inside	Pitch	Threads	Depth of	Radius
	Thread	diameter	diameter	diameter	P	per in.	Threads	r
		d-D	d2-D2	d1-D1		Z	H1
	PG 7	12.5	11.89	11.28	1.27	20	0.61	0.14
	PG 9	15.2	14.53	13.86	1.41	18	0.67	0.15
	PG 11	18.6	17.93	17.26	1.41	18	0.67	0.15
	PG 13.5	20.4	19.73	19.06	1.41	18	0.67	0.15
	PG 16	22.5	21.83	21.16	1.41	18	0.67	0.15
	PG 21	28.3	27.54	26.78	1.588	16	0.76	0.17
	PG 29	37	36.24	35.48	1.588	16	0.76	0.17
	PG 36	47	46.24	45.48	1.588	16	0.76	0.17
	PG 42	54	53.24	52.48	1.588	16	0.76	0.17
	PG 48	59.3	58.54	57.78	1.588	16	0.76	0.17