RAM Mount Knob w/Keyed Lock & 1/4" - 20 Brass Hole [RAM-KNOB3LU] Communication | VHF - Fixed Mount is threaded to approximately 3/8

is threaded to approximately 3/8 inch from flange

Unique Integrated Handset:

Pole/Throw: SPDT - Single Pole/ Double Throw

Axiom RV Adapter Cable (25-pin to 7-pin)

Rated @ 100

RAM Mount Knob w/Keyed Lock & 1/4" - 20 Brass Hole [RAM-KNOB3LU] Communication | VHF - Fixed Mount is threaded to approximately 3/8The RAM Locking Knob includes a brass 1 4" 20 thread, for 1" (B size) socket arms; this allowing you to disengage the screwing of the knob. Once you have set your mount in the location you need, you can lock it in place and feel safe that your mounted device will stay right where you left it. Material: Powder coated marine grade aluminum Note: The "U" in the part number reflects product packaged in poly bag.