The MP296C is an adapter from 1” 14 TPI to 1”¼.

Due to the separated adapter tube and nut, the antenna does not turn when installed.
Therefore the wire of the antenna does not spin around when the adapter is fitted.

Set contains: 1 x mounting nut, 1 x adapter tube, 1 x teflon ring.
Thread mounting nut: 1” ¼ inch female
Thread adapter tube: 1” 14 TPI male