2001-03-06
Recently while doing some spring cleaning around my office, I came across a
technical data sheet from a company called Panel Components. You may visit
their website at http://www.panelcomponents.com.
Of interest was the catalogue on Strain Reliefs; Data Sheet 148, 4/1999.
Note the following from page 2:
NPT and PG thread types Compared
Interpower(TM) strain reliefs are available in two different types of
mounting threads: NPT and PG. NPT (National Pipe Thread) is the American
standard. PG (Panzer Gewinde) is an European standard. PG threads are
sometimes referred to as metric threading; however, these threads are not
truly metric. There is a metric system of threading that is slowly
replacing PG threads, but very few people have actually started using metric
threads at this time.
Seeing that this catalogue is two years old, I wonder how far this true
metric thread series has advanced. Has anybody heard of it? If you have,
please post it here.
BTW, for those who don't know German, Panzer Gewinde means armoured thread.
John
Keiner ist hoffnungsloser versklavt als derjenige, der irrtümlich glaubt
frei zu sein.
There are none more hopelessly enslaved then those who falsely believe they
re free!
Johann Wolfgang von Goethe (1749-1832)
