<s>
An	O
SR	B-Protocol
connector	I-Protocol
,	O
or	O
CP	O
connector	O
(	O
from	O
Russian	O
:	O
Соединитель	O
Радиочастотный	O
,	O
radio	B-Protocol
frequency	I-Protocol
connector	I-Protocol
)	O
is	O
a	O
type	O
of	O
Russian	O
made	O
RF	B-Protocol
connector	I-Protocol
for	O
coaxial	O
cables	O
.	O
</s>
<s>
Based	O
on	O
the	O
American	O
BNC	B-Protocol
connector	I-Protocol
,	O
the	O
SR	B-Protocol
connector	I-Protocol
differs	O
slightly	O
in	O
dimensions	O
due	O
to	O
discrepancies	O
in	O
imperial	O
to	O
metric	O
conversion	O
,	O
though	O
with	O
some	O
force	O
they	O
can	O
still	O
be	O
mated	O
.	O
</s>
<s>
There	O
are	O
however	O
types	O
of	O
SR	B-Protocol
connectors	I-Protocol
that	O
do	O
not	O
resemble	O
their	O
American	O
counterpart	O
.	O
</s>
<s>
Most	O
SR	B-Protocol
connectors	I-Protocol
are	O
variants	O
of	O
SR-50	O
(	O
50	O
Ω	O
)	O
or	O
SR-75	O
(	O
75	O
Ω	O
)	O
versions	O
,	O
with	O
the	O
SR-75	O
typically	O
having	O
a	O
thinner	O
center	O
pin	O
.	O
</s>
<s>
They	O
often	O
resemble	O
C	B-Protocol
connectors	I-Protocol
in	O
shape	O
,	O
and	O
have	O
threaded	O
inserts	O
similar	O
to	O
N	B-Protocol
connectors	I-Protocol
.	O
</s>
