The 477 is fitted from the inside of the enclosure.
M16 to M75 as standard.
Other thread options available on request, including BSPP, PG, NPT and ET.
Metric entry threads are 1.5mm pitch as standard.
Manufactured in Brass, Nickel Plated Brass, Steel, Nickel Plated Steel and Stainless Steel. (Aluminium for Group II use only).
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