|Mating Action Types
Connectors with threaded mating (screw-on types) employ a jack with
external threads and a rotating, internally-threaded coupling nut on
plugs. These types can be hand-tightened or, for optimal performance,
torqued to specified figures with a wrench. Coupling nuts of threaded
connectors may pull off if overtorqued, because the strength of their
retaining mechanism is generally less than the force required to strip
the mating threads. Some plugs are available with lockwire holes in
the plug coupling nut, for wiring mated pairs together after mating
in order to prevent loosening under vibration.
|Delta connector series with threaded
mating include 7/16, GHV,
HN, LC and LT, N,
SC, SMA, SMC,
SMK, SSMC, TNC, TW34,
Connectors with bayonet-type mating engage initially with a straight
push to insert the external studs of the jack into the lands inside
the plug coupling nut. The coupling nut is then rotated to seat the
studs into a retaining relief in the bottom of the lands. When unmating,
the coupling nut must be pushed slightly to unseat the studs from the
retaining relief, then rotated and pulled off the jack. Bayonet mating
is quick and convenient, and the connectors cannot be unmated accidentally.
Some rocking of mated pairs may occur under mechanical stress in series
that utilize two studs in the interface; TRB
and TPS connectors have a three-stud interface
design to prevent rocking.
|Delta connector series with bayonet
mating include: BNC, C,
MHV, TPS, TRB,
Mating: Connectors that mate with a straight push and unmate
with a straight pull fall into three categories:
|Positive-locking types, such
as QDS and MiniQDS, feature
a spring-loaded collar on the coupling nut which must be retracted to
mate or unmate the connectors. In mated condition, the collar prevents
the connectors from unmating accidentally.
|Snap-on types, such as SMB
series, use spring fingers in the plug which snap into a groove on the
jack. Snap-on types can be accidentally unmated by pulling on the cable
|Slide-on types, such as G874,
simply push together and mating is maintained by spring-finger friction.
These types are useful when connectors pairs must be mated and unmated
frequently. A version of SMB connectors with slide-on mating is also
|See our RF Connector
size comparison chart to see the plug and jack configuration in
each of our standard series.
| Back to RF -
Microwave - Millimeter wave Connector Terminology main page.