How it connects
Cut end of corrugated ENT is pushed straight into the socket until the retaining fingers snap into a corrugation valley; mechanical hold only, not watertight unless the fitting is rated/gasketed for concrete-tight use.
Male and female halves
Female: the fitting socket. The male is simply the corrugated ENT tube itself; there is no separate male snap-in fitting end.
Usually connects to
- Plain-cut corrugated ENT tubing of the same nominal trade size
Common sizes
- ENT trade sizes include 1/2, 3/4, 1, 1-1/4, 1-1/2 and 2 in; the trade name is not the measured socket diameter.
- Carlon quick-connect couplings and threaded adapters are offered in 1/2, 3/4 and 1 in sizes.
Where it is used
Residential/commercial building electrical racewaysConcrete-embedded conduit systems
Variations
- One-piece quick-connect
- Two-piece snap fitting, including eight-tab types
- Snap coupling, both ends
- Snap-to-male-thread adapter
- Snap box connector
- Concrete-tight version
How to recognise it
Short plastic (PVC or polycarbonate, often grey/blue) collar with slotted flexible fingers or tabs around the open end; part listings say 'ENT snap-in'; other end may be another snap-in, a male NPS/NPT thread, or a box-knockout snap.
Often confused with
| Confused with | How to tell them apart |
|---|---|
| PVC conduit slip (solvent-weld) socket | Slip sockets are smooth bores for rigid smooth PVC conduit and are glued; ENT snap-in sockets have flex fingers/latches for corrugated tube. |
| Liquidtight flexible nonmetallic conduit (LFNC) fitting | LFNC fittings use a compression nut and ferrule; ENT snap-in fittings have no nut. |
| Smooth conduit solvent-weld socket | The ENT snap socket has flexible retention features for corrugations, rather than relying solely on a smooth cemented socket. |
| Male NPT adapter end | External screw threads belong to the opposite interface; the ENT receiving socket retains tubing by tabs. |
Also called
ENT snap-in coupling endSmurf tube snap-in fittingENT quick-connect socketENT snap-in tubing connection
Good to know
ENT box connectors and snap-in × male adapters can both use this finger-style conduit socket.
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