Conduit Fittings

ldoodle · 2026-04-01T10:35:48+0100

I can't tell 100% if this fitting has a locknut to be used with standard backbox knockouts, or if its designed to be used with threaded holes.

https://www.screwfix.com/p/deta-male-corrugated-conduit-adaptors-20mm-black-5-pack/212pv#product_additional_details_container

(I have the matching Delta 20mm corrugated/flexible conduit.)

Thanks

Harry Bloomfield · 2026-04-01T12:35:39+0100

ldoodle said:
I can't tell 100% if this fitting has a locknut to be used with standard backbox knockouts, or if its designed to be used with threaded holes.

I think they will work with either a 20mm knockout, or a 20mm threaded steel coupling.

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Conduit Fittings

ldoodle

Harry Bloomfield

DIYnot Local

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